Of Temperature Or Pressure Patents (Class 203/2)
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Publication number: 20040079629Abstract: A distillation and recycling treatment device is disclosed.Type: ApplicationFiled: October 29, 2002Publication date: April 29, 2004Inventor: Jim Wu
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Publication number: 20040065538Abstract: A process for recovering crude 1,3-butadiene from a C4 fraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subregion (A), a second subregion (B) and a lower common column region (C) and which is preceded by an extractive scrubbing column (K) is proposed.Type: ApplicationFiled: August 8, 2003Publication date: April 8, 2004Inventors: Gerd Bohner, Klaus Kindler, Melanie Pahl, Gerd Kaibel
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Publication number: 20040060808Abstract: A solar still apparatus is described for the multi-effect distillation of a fluid such as water. A transparent condenser air duct overlies an evaporator air duct having a light-absorbing floor, both sharing a transparent plastic film wall. Air, blown by a fan, flows through the lower duct, where it progressively warms and evaporates a feedstock fluid. At the hot end of the lower duct, the air enters the upper duct where it flows in a reverse direction, progressively cooling and condensing its vapor, a portion of the heat of condensation being transferred through the shared wall to the lower duct. Thermal gradients established within the still facilitate the evaporation and condensation of the fluid with minimal heat loss to the environment and maximal recuperation of the heat of condensation for fluid evaporation. A working fluid may be used to extract useful power from the still's thermal gradients.Type: ApplicationFiled: August 4, 2003Publication date: April 1, 2004Inventor: Paul Alex LaViolette
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Patent number: 6706153Abstract: The invention relates to a process for the separation of a ketoxime or aldoxime from a ketoxime- or aldoxime-containing amide mixture in which the ketoxime or aldoxime is separated from the amide mixture by distillation. This has proved to be a very simple and direct method for separating the ketoxime and/or aldoxime from the desired amide.Type: GrantFiled: January 7, 1999Date of Patent: March 16, 2004Assignee: DSM N.V.Inventors: Yvonne H. Frentzen, Nicolaas F. Haasen, Henricus F. W. Wolters
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Publication number: 20040045804Abstract: A process for obtaining pure 1,3-butadiene from crude 1,3-butadiene by distillation is carried out in a dividing wall column in which a dividing wall is located in the longitudinal direction of the column to form an upper common column region, a lower common column region, a feed section and an offtake section.Type: ApplicationFiled: October 14, 2003Publication date: March 11, 2004Inventors: Gerd Bohner, Klaus Kindler, Melanie Pahl, Gerd Kaibel
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Publication number: 20040042949Abstract: The invention relates to a method and a device for separating aluminium from chlorosilanes, in particular for separating aluminium trichloride from silicon tetrachloride or trichlorosilane or from mixtures of silicon tetrachloride or trichlorosilane. According to the invention, aluminium chloride is removed from the chlorosilanes silicon tetrachloride and trichlorosilane in a continuous process, without the addition of admixtures, to obtain a residual content of aluminium that is as low as required, by separating the aluminium trichloride and the chlorosilane by distillation, at a temperature approximately greater than 160° C.Type: ApplicationFiled: May 12, 2003Publication date: March 4, 2004Inventors: Hans-Dieter Block, Rainer Weber, Gunter Olf, Hans-Joachim Leimkuhler, Johannes-Peter Schafer
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Publication number: 20040031674Abstract: A process for working up mixtures containing (meth)acrylic acid and/or (meth)acrylic ester in a column for distilling, rectifying and/or fractionally condensing in the presence of at least one polymerization inhibitor and an oxygen-containing gas, wherein the partial oxygen pressure p(O2) in the gas phase of the entire column is from 2 to 5 hPa.Type: ApplicationFiled: June 12, 2003Publication date: February 19, 2004Applicant: BASF AkiengesellschaftInventor: Jurgen Schroder
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Patent number: 6692616Abstract: A process is disclosed for the purification, by distillation, of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal, said process including the following steps: (a) reaction of n-butyraldehyde with formaldehyde in the presence of catalytic amounts of a tertiary amine, and hydrogenation of the resulting mixture to give a mixture containing trimethylolpropane; (b) separation of water, methanol, trialkylamine and/or trialkylammonium formate by distillation; (c) heating of the residue obtained in (b) under reduced pressure to a temperature at which TMP is volatile and compounds boiling above TMP are cleaved, in order to separate off, by distillation, TMP and compounds more volatile than TMP; (d) distillation of the distillate obtained in (c) in order to separate off the more volatile compounds and recover pure TMP; and (e) optional distillation of the TMP obtained in (d) in order to recover TMP with a low APHA color index.Type: GrantFiled: June 26, 2002Date of Patent: February 17, 2004Assignee: BASF AktiengesellschaftInventors: Matthias Dernbach, Detlef Kratz, Achim Stammer, Harald Rust, Gerhard Schulz
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Publication number: 20040026224Abstract: An object of the present invention is to provide a method for simulating a distillation apparatus having a coupling-type distillation column (10), the method speeding completion of simulation operation. The simulation for the distillation apparatus including a coupling-type distillation column (10) is performed by use of a simulation program for simulating a distillation apparatus including a main column (31) and a side column (32) in combination.Type: ApplicationFiled: April 28, 2003Publication date: February 12, 2004Inventors: Shizuo Midori, Yurie Ohkuma, Tamura Katsunori, Yoichi Harada
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Patent number: 6676808Abstract: A method for starting up a distilling column destined to handle an easily polymerizing compound-containing solution characterized by supplying at the start of the operation of the distilling column a polymerization inhibitor to the bottom liquid of the distilling column having a temperature of not higher than 80° C. Further, by supplying a reflux liquid through the top of the distilling column or the middle stage of the column prior to the start of the temperature elevation of the distilling column, thereby preventing the polymerization of the easily polymerizing compound more effectively.Type: GrantFiled: May 31, 2001Date of Patent: January 13, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Kei Hamamoto, Yukihiro Matsumoto, Sei Nakahara, Misao Inada
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Publication number: 20040000470Abstract: A method to purify N,N-dimethylacetamide (DMAc) from an aqueous solution containing acetic acid as a contaminant. Two fractional distillation columns are arranged in a series. The solution containing the contaminant is provided to the first column with a temperature profile to result in acetic acid partitioning into the overhead water. The material remaining in the bottom portion of the first column is recycled to the first column and also provided into a second column, whereby DMAc free of acetic acid contamination is recovered, and remaining DMAc and acetic acid are returned to the first column for further separation. The method uses standard fractional distillation procedures and equipment, thus eliminating the need for more complex extractions and/or chromatographic separations.Type: ApplicationFiled: July 1, 2002Publication date: January 1, 2004Applicant: MALLINCKRODT INC.Inventor: Michael J. Gentilcore
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Publication number: 20040000471Abstract: The present invention concerns a process for providing tertiary amine products which are color-stable, and have a greatly reduced tendency to take on color during their storage. According to the invention, an ethyleneamine derivative is added to the distillation pot prior to or during the distillation of the tertiary amine product. Preferably, the ethyleneamine derivative has a higher boiling point than the desired tertiary amine product so as to preclude the ethyleneamine from distilling over with the tertiary amine.Type: ApplicationFiled: June 6, 2003Publication date: January 1, 2004Applicant: Huntsman Petrochemical CorporationInventors: Wei-Yang Su, Mark L. Posey, Maarten P. ter Weeme
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Publication number: 20030213688Abstract: A method and apparatus for process control in a distillation column are disclosed. The method allows undesirable interactions among control parameters to be minimized, and results in improved process control and operational stability. Process control of a liquid assisted nitrogen generator using the improved method is disclosed as an illustrative example.Type: ApplicationFiled: March 26, 2002Publication date: November 20, 2003Inventors: Baechen Benson Wang, Mark D. Alexion
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Patent number: 6649027Abstract: A water reclamation system for a closed environment includes a mixer that receives brine. A processor is downstream of the mixer, with the processor distilling substantially salt-free water from the brine in the substantial absence of salt crystallization. A crystallizer subsystem is downstream of the processor, with the crystallizer subsystem crystallizing salt from the brine and recycling the brine to the mixer.Type: GrantFiled: March 7, 2000Date of Patent: November 18, 2003Assignee: Honeywell International Inc.Inventors: Allen Kent MacKnight, Alex M. Lubman
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Patent number: 6635151Abstract: The present invention relates to a process for separating the water from an aqueous lactam solution. It applies more particularly to a mixture resulting from the reaction between an aminonitrile and water (this reaction also being called cyclizing hydrolysis). The subject of the invention is a process for separating the water from an aqueous lactam solution, which process is economical both from the standpoint of the investment necessary for its implementation and from the standpoint of the operating cost.Type: GrantFiled: May 24, 2001Date of Patent: October 21, 2003Assignee: Rhodia Fiber & Resin IntermediatesInventors: Gerald Bocquenet, Yves Courtemanche, Patrick Houssier
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Patent number: 6635149Abstract: A water purification system and method for residential or commercial application having a first support structure coupled to a water supply having a first heat source of sufficient magnitude to change the water into steam, thus abandoning any insoluble material dispersed within the liquid. The steam is further heated in a second support structure to form a substantially gaseous vapor and exposed to a second heat source of sufficient magnitude to super-heat the vapor to a temperature capable of destroying most, if not all living matter. Preferably, the second heat source is an electrical field of sufficient voltage to increase the temperature of the vapor in excess of 2000° F. The super-heated vapor is then allowed to condense to form potable water. This system may be powered by a standard 120 volt outlet found in the home.Type: GrantFiled: October 26, 2000Date of Patent: October 21, 2003Inventors: Norman Campbell, Norman E. Bersing, Ronald E. Larsen
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Publication number: 20030188962Abstract: A distillation system is provided having an evaporation conduit and a condensing conduit connected by a transfer system for transferring distillate vapour from the evaporation conduit to the condensing conduit to condense the distillate. The evaporation and condensing conduits operate under vacuum pressure. An intake conduit and a return conduit communicate in an unrestricted manner between a source of solution and the evaporation conduit. A distillate conduit communicates with the condensing conduit for dispensing condensed distillate therefrom. A radiant heat capturing system is provided for capturing and using heat radiated from the distillate conduit to generate power.Type: ApplicationFiled: April 3, 2002Publication date: October 9, 2003Inventor: George Atwell
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Publication number: 20030178294Abstract: The inventive device for distilling a medium comprises at least one reservoir (11, 51) or accommodating the medium (15, 55) to be distilled, a heating element (12, 52) for vaporizing the medium (55), and comprises at least one collecting vessel (20, 60), which is situated downstream and which is provided with a cooling element for condensing the produced distillation vapor. In addition, a pipe (19, 59) or the like is provided on the top side of the reservoir (11, 51). Said pipe leads into the collecting vessel (20, 60) and connects the vapor space (14, 54) located inside the reservoir (51) to that which is located inside the collecting vessel (20, 60). To this end, means are provided, which, for the most part, completely remove foreign gases from the vapor spaces (14, 24; 54, 64) before or at the beginning of the distillation process.Type: ApplicationFiled: May 12, 2003Publication date: September 25, 2003Inventors: Mark Braendli, Markus Lehmann
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Publication number: 20030173204Abstract: A distillate system, especially of the sea water, by using the sun as heat source and the sea water as cold source, falling the work pressure to the boiling point of the sea water between the temperature generated by the sun and the temperature of the sea water. The sea water and the fresh water are entered/removed to/from the distillation system at the same time, by compensating the pressure differences.Type: ApplicationFiled: February 24, 2003Publication date: September 18, 2003Inventor: Gines Sanchez Gomez
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Patent number: 6607639Abstract: A desalinization process and apparatus utilizing a humidity chamber having a saltwater structure; a cooling water structure and a salt-free water collection structure. Saltwater having a first temperature and cooling water having a second temperature are introduced into the humidity chamber. The temperature difference between the saltwater and the water running through the water coil create a temperature gradient causing salt-free water to distill from the saltwater. The salt-free water is then collected.Type: GrantFiled: August 17, 2001Date of Patent: August 19, 2003Inventor: David E. Longer
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Patent number: 6605191Abstract: A process for the work up of a reaction mixture obtained from the preparation of diaryl carbonate by direct carbonylation of aromatic hydroxy compounds is disclosed. The process entails obtaining a reaction mixture that contains diaryl carbonate, aromatic hydroxy compound, water, base and quaternary salt, separating the mixture in a distillation apparatus having only one theoretical separation stage into a liquid phase and a gas phase and recycling the liquid phase without further work up to the reaction step of the direct carbonylation.Type: GrantFiled: June 15, 2001Date of Patent: August 12, 2003Assignee: Bayer AktiengesellschaftInventors: Carsten Hesse, Ursula Jansen, Johann Rechner, Claus-Peter Reisinger, Rob Eek, Kaspar Hallenberger, Martin Friedrich
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Patent number: 6605190Abstract: The method and system of the present invention is designed to minimize exergy consumption consistent with a given level of product purity. For example, in a distillation system, the design employs a plurality of thermostatted trays which are maintained at a sequence of temperatures specified by finding the optimal control for an irreversible thermodynamic process. The specified temperatures at each tray are achieved with the help of a tandem heat pump which works over the range of required temperatures and which delivers the specified heat demands.Type: GrantFiled: February 14, 1997Date of Patent: August 12, 2003Assignee: San Diego State University FoundationInventors: Peter Salamon, Bjarne Bogeskov Andresen, James Darwin Nulton
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Publication number: 20030146081Abstract: A method of recovering acrylic acid from a mixture comprising acrylic acid, water and acetic acid is disclosed, which includes: (a) extracting acrylic acid from the mixture with a solvent mixture comprising ethyl acrylate as the preponderant component thereof and an organic co-solvent selected from the group consisting of toluene, heptane, 1-heptene, methylcyclohexane, cycloheptane, cycloheptadiene, cycloheptatriene, 2,4-dimethyl-1,3 pentadiene, methylcyclohexene and methylenecyclohexene to form an extracted composition; and (b) azeotropically distilling the extracted composition to recover acrylic acid.Type: ApplicationFiled: January 8, 2002Publication date: August 7, 2003Inventors: Salvador Aldrett, Diane Elizabeth Allen, Nathan K. Powell, Christopher Lawrence Wilkins, Edmund Jungpiao Yang
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Patent number: 6596129Abstract: The present invention provides: a process can be preventive of a polymerization in a distillation apparatus when distilling a solution containing easily polymerizable substances such as (meth)acrylic acid and (meth)acrylic acid ester. In the distillation process for an easily polymerizable substance-containing solution which includes the step of distilling an easily polymerizable substance-containing solution by a distillation column equipped with a condenser for condensation at a vapor outlet of the distillation column, at least one condenser for polymerization inhibition is further placed in series on a vapor outlet side of the condenser for condensation, and the easily polymerizable substance which is contained in vapor from an upstream condenser is condensed by a downstream condenser.Type: GrantFiled: October 31, 2000Date of Patent: July 22, 2003Assignee: Nippon Shokubai Co., Ltd.Inventors: Yukihiro Yoneda, Takeshi Nishimura, Yasuhiro Shingai, Hajime Matsumoto
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Publication number: 20030133864Abstract: The invention disclosed herein generally relates to a system and a method for supplying a carbon dioxide fluid feed to a plurality of applications. The method of the invention comprises the steps of directing a fluid feed, that includes a carbon dioxide component, from a carbon dioxide purifying means to a plurality of applications including at least two distinct applications, whereby contaminants are combined with the fluid at said applications, thereby forming an effluent that includes at least a portion of the carbon dioxide component and at least a portion of said contaminants; directing said effluent from at least one of the applications to said carbon dioxide purifying means; and purifying the carbon dioxide of the effluent at the carbon dioxide purifying means, thereby producing the carbon dioxide component of the fluid feed. The system of the invention is an apparatus for conducting the method of the invention.Type: ApplicationFiled: October 17, 2002Publication date: July 17, 2003Applicant: Praxair Technology, Inc.Inventors: John Fredric Billingham, Henry Edward Howard, Kimberly Hershey
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Publication number: 20030121769Abstract: The invention relates to the purification of pentafluoroethane (F125) containing chloropentafluoroethane (F115) by liquid/liquid extraction or by extractive distillation.Type: ApplicationFiled: September 16, 2002Publication date: July 3, 2003Inventors: Emmanuel Guiraud, Cathy Descamps
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Publication number: 20030116286Abstract: The present invention relates to an improved falling strand devolatilizer apparatus and method for devolatilization of viscous solutions to yield viscous liquids with lower content of volatile solvents, unreacted components, and reaction byproducts. The novel apparatus utilizes a devolatilization system comprised of a single vessel with two or more liquid compartments or zones, a recirculation loop, and one or more manifold and stranding distributor assemblies to divide the viscous liquid stream into a plurality of strands for effective devolatilization. A stranded stream of solution is dropped through a first zone of the chamber and collected at the bottom, the stream is recirculated, and then dropped through a second zone of the vessel and separately collected. Devolatilization is accomplished by stranding thi falling streams to optimum parameters.Type: ApplicationFiled: December 17, 2002Publication date: June 26, 2003Applicant: PROCESS DEVELOPMENT SERVICES, INC.Inventors: Peter R. Cowley, Randolph E. Newman
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Publication number: 20030089590Abstract: A distillation system (10) is provided for recovering water from sea water and other polluted water source. The system (10) has a heat engine (12) embodying Carnot cycle and a Rankine cycle formed by heat exchangers (16 and 24), flash evaporator (26) and condenser (32). Burnt gases from the engine (12) such as a jet engine no longer fit for flying are directed into a duct (14) where the exchangers (16) and (24) are located. Sea water is pumped into the heat exchanger (24) for preheating by residue heat in the duct (14) and then into the exchanger (16) for further heating. A recirculating pump (20) raises water pressure in the exchanger (16) for increasing boiling point to about 165° C. The heated water is fed into the evaporator (26) where it changes into vapour and the condensed into water by the condenser (32). The jet air stream is used to create Venturi effect for maintaining sub-atmospheric pressure in the evaporator (26). Any solid left in the evaporator (26) is removed by a transfer mechanism (50).Type: ApplicationFiled: August 2, 2002Publication date: May 15, 2003Inventors: Gregogy Mark Paxton, Patrick Joseph Glynn
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Patent number: 6558515Abstract: A control method and apparatus for regulating the rate of vapor flow in the two adjacent sections of a dividing wall fractional distillation column are presented. The liquid level on a tray at the top of each section is used to control the rate of vapor flow through the tray. The liquid level is controlled by measuring the pressure differential across the tray in each section and varying the flow of liquid to this tray in response to the differential.Type: GrantFiled: April 23, 2001Date of Patent: May 6, 2003Assignee: UOP LLCInventor: Paul C. Steacy
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Publication number: 20030079981Abstract: A distilling apparatus and method use a two step distillation and purification process for processing a waste liquid, such as an impure sulfuric acid solution, to form a highly concentrated sulfuric acid solution. First, the waste liquid is stored in a concentrating column, where it is heated. A condenser, which uses the waste liquid as a cooling medium, condenses the vapor generated by the heater. The condensed vapor is passed through a filter, which separates impurities out of the waste liquid, prior to feeding the waste liquid back into the concentrating column. Water is then removed from the waste liquid via a distilling process. The resulting concentrated liquid is then fed to a purifying column, where it is again heated, to remove residue, and condensed, resulting in a highly pure waste liquid.Type: ApplicationFiled: November 22, 2002Publication date: May 1, 2003Applicant: FUJITSU LIMITEDInventors: Hiroshi Osuda, Toru Matoba, Daisuke Adachi, Masataka Fukuizumi
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Patent number: 6554966Abstract: The invention relates to a process for preparing essentially formic acid-free N-alkyl-N′-methylalkyleneureas of the formula with R1=H or CH3, R2=CnH2n+1 with n=1-4 and x=0 or 1, from the corresponding alkyleneureas by reaction with monomeric or polymerized formaldehyde in the presence of formic acid. This entails feeding the mixture, obtained in the reaction, of N-alkyl-N′-methylalkyleneurea and formic acid to the upper region of a distillation column, distilling without further additions and removing essentially formic acid-free N-alkyl-N′-methylalkyleneurea in the lower region of the column.Type: GrantFiled: June 26, 2000Date of Patent: April 29, 2003Assignee: BASF AktiengesellschaftInventors: Andreas Kramer, Johann-Peter Melder, Heinz RĂĽtter, GĂĽnter Riewe, Wolfgang Siegel, Hans-JĂĽrgen Weyer
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Patent number: 6551465Abstract: The operation of the dividing wall section of a dividing wall column is controlled by a control apparatus comprising a ratio controller which divides the liquid flowing into the dividing wall section. The rate of return of overhead liquid to the column is set by monitoring the temperature in the top of the product dividing wall section and the sidecut product draw rate is set by monitoring a temperature in the bottom of the product dividing wall section.Type: GrantFiled: April 23, 2001Date of Patent: April 22, 2003Assignee: UOP LLCInventors: Charles P. Van Zile, James W. Harris
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Patent number: 6551464Abstract: A combination reflux/distillation apparatus is provided having interchangeable reflux and distillation columns, a segmented collection trough and an integrated indirect heating provision. The apparatus is uniquely adapted for refluxing and distilling small quantities of materials without the losses attendant to larger apparatus.Type: GrantFiled: February 17, 2000Date of Patent: April 22, 2003Inventor: Howard Kimel
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Publication number: 20030057085Abstract: A closed tunnel system for distilling fresh water from ocean salt water is provided with an elongated evaporation plate adapted to hold ocean water for evaporation therefrom. During the distillation process, a vacuum is drawn in the tunnel, and sunlight is focused onto the evaporation plate with a concave lens-structure roof. External concave mirrors automatically track the sun and focus additional sunlight onto the lens-structure roof. An agitator-wiper unit agitates the ocean water on the evaporation plate to maintain a homogeneous liquid mixture, and to present additional water surface area for evaporation of fresh water. The fresh water vapor then condenses under pressure in heat exchangers that simultaneously pre-heat the ocean water prior to entry onto the evaporation plate.Type: ApplicationFiled: September 24, 2001Publication date: March 27, 2003Inventor: Hossein Azimi
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Publication number: 20030047438Abstract: An object of the present invention is to reduce the number of instruments used in a distillation apparatus to thereby simplify control.Type: ApplicationFiled: October 25, 2002Publication date: March 13, 2003Applicant: SUMITOMO HEAVY INDUSTRIES, LTD.Inventors: Katsunori Tamura, Ken Nishiyama, Taizo Inoue, Keiji Yoshimoto, Noboru Okamoto, Minoru Nagashima
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Publication number: 20030029712Abstract: Disclosed herein are methods for the recovery of at least one of an organic acid or an organic acid amide, such as a heat stable lactic acid or lactamide, from a feed stream comprising the organic acid and/or organic acid amide. The feed stream that comprises the organic acid and/or organic acid amide is mixed with at least one azeotroping agent. The azeotroping agent is a hydrocarbon capable of forming at least one heteroazeotrope with the organic acid or the organic acid amide. The mixture comprising the feed stream and the azeotroping agent is heated to produce a vapor stream that comprises the heteroazeotrope. The vapor stream can be heated further to separate components or it can be condensed into a liquid stream. The liquid stream is capable of being separated into a first phase and a second phase. The first phase contains the highest concentration of the organic acid and/or the organic acid amide and the second phase comprises the azeotroping agent.Type: ApplicationFiled: March 15, 2001Publication date: February 13, 2003Inventors: Michael Charles Milner Cockrem, Istvan Kovacs
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Publication number: 20030029711Abstract: Disclosed herein are methods for the recovery of an organic acid, such as a heat stable lactic acid, from a feed stream comprising at least one of an organic acid amide, an organic acid ammonium salt, or an alkylamine-organic acid complex. The feed stream that comprises the organic acid amide, organic acid ammonium salt, or alkylamine-organic acid complex is mixed with at least one azeotroping agent. The azeotroping agent is a hydrocarbon capable of forming at least one azeotrope with the organic acid that is produced by the thermal decomposition of the amide, ammonium salt, or complex in the feed stream. Preferably the azeotrope is a heteroazeotrope. The mixture comprising the feed stream and the azeotroping agent is heated to produce a vapor stream that comprises the azeotrope. The vapor stream can be condensed to a liquid stream, and the organic acid is recovered in the liquid stream that is produced.Type: ApplicationFiled: March 15, 2001Publication date: February 13, 2003Inventors: Michael Charles Milner Cockrem, Istvan Kovacs
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Publication number: 20030024801Abstract: The present invention is a distillation system with individual fractionator tray temperature control, with the use of either a heating element or a cooling element, and in some preferred embodiments, the use of both a heating element and a cooling element in a plurality of fractionator trays. There is at least, and typically more than one distillation column having a plurality of fractionation trays, and having feed input, liquid removal, and vapor removal with the plurality of trays including at least one of a heating element and a cooling element. Controls are included for separate control of each of the heating element(s) and/or said cooling element(s). These controls may be regulated by a programmable microprocessor, and feedback from temperature sensors may be employed to provide discrete tray-by-tray temperature controls.Type: ApplicationFiled: August 1, 2001Publication date: February 6, 2003Inventor: Li Young
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Patent number: 6508916Abstract: A process for recovering processing liquids such as gas-treating liquids wherein a feed mixture containing the processing liquid, water, and optionally additional components that are more volatile than the processing liquid and components that are less volatile than the processing liquid, is initially heated in a first heating zone to a temperature sufficient to volatilize at least some of the water and a portion of the processing liquid without decomposing the processing liquid to produce a vapor stream containing volatilized water and processing liquid and a residuum containing the bulk of the processing liquid and less volatile component, the vapor stream being separated from the residuum and treated to produce recycle streams of water, purified processing liquid, and low and high boiling liquid fractions recovered from the purified processing liquid.Type: GrantFiled: June 14, 1999Date of Patent: January 21, 2003Assignee: Canadian Chemical Reclaiming Ltd.Inventors: Minoo Razzaghi, Stephen G. Kresnyak, Brian A. Keast, Timothy W. Giles
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Patent number: 6508915Abstract: A distilling apparatus and method use a two step distillation and purification process for processing a waste liquid, such as an impure sulfuric acid solution, to form a highly concentrated sulfuric acid solution. First, the waste liquid is stored in a concentrating column, where it is heated. A condenser, which uses the waste liquid as a cooling medium, condenses the vapor generated by the heater. The condensed vapor is passed through a filter, which separates impurities out of the waste liquid, prior to feeding the waste liquid back into the concentrating column. Water is then removed from the waste liquid via a distilling process. The resulting concentrated liquid is then fed to a purifying column, where it is again heated, to remove residue, and condensed, resulting in a highly pure waste liquid.Type: GrantFiled: December 17, 1997Date of Patent: January 21, 2003Assignee: Fujitsu LimitedInventors: Hiroshi Osuda, Toru Matoba, Daisuke Adachi, Masataka Fukuizumi
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Patent number: 6506284Abstract: There is provided a reduced-pressure distillation system, which is relatively simple in construction, easy in operation without depending only on driving of a vacuum pump, and therefore can be manufactured and operated at low costs. The system includes an impure water tank, a separating tank, a drainage tank, and a collecting tank. The impure water tank, the drainage tank, and the collecting tank each has an outside pressure communicating chamber, which makes contact with outside pressure, and a cell, which communicates with the outside pressure communicating chamber corresponding thereto and is sealed with respect to the outside pressure during operation of the system. The separating tank is sealed with respect to outside pressure and has an evaporator provided therein. Impure water is fed from the cell of the impure water tank to the evaporator, by using an effective head between levels of the impure water in the impure water tank and priming supplied to the drainage tank.Type: GrantFiled: September 15, 1999Date of Patent: January 14, 2003Inventor: Tetsuo Miyasaka
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Publication number: 20030000651Abstract: In a rotary evaporator, the rotating speed of the rotating flask is automatically controlled or regulated dependent upon a detected process value, particularly the vibration behavior or the mass moment of inertia of the rotating flask.Type: ApplicationFiled: March 14, 2002Publication date: January 2, 2003Inventor: Hans Georg Genser
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Patent number: 6492099Abstract: A process for purifying p-phenylenediamine color developers in their free-base form. The process includes subjecting a solution containing p-phenylenediamine-type free base color developer to short path distillation which includes at least one of falling film evaporator, thin film evaporator, wiped film evaporator, or short-path evaporator. Another aspect is a method for preparing an acid salt from a p-phenylenediamine free base color developer. The method includes the steps of: a) dissolving a purified p-phenylenediamine free base derived from the short path distillation process in an organic solvent; b) contacting the dissolved free base distillate with an appropriate mineral acid; and c) crystallizing the color developer in the acid salt form.Type: GrantFiled: June 28, 2001Date of Patent: December 10, 2002Assignee: Eastman Chemical CompanyInventors: Lucian Boldea, Phillip Montgomery Hudnall
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Publication number: 20020179425Abstract: A process comprising electrically activating a thermoelectric module (24) to provide a first module heated surface (26) and a module cooler surface (28); feeding the impure liquid to the first module heated (26) surface to produce vapour of the liquid; and transferring the vapour to the module cooler surface (28) to effect heath transfer to the module cooler surface (28), the improvement comprising (a) directing a first portion of the vapour adjacent to or onto the module cooler surface (28) to effect heat transfer to the module cooler surface to produce a first condensed liquid (b) directing a second portion of the vapour to condenser means (18) comprising a second cooler surface (46) remote from the module cooler surface (28) to effect heat transfer to the second cooler surface (46) to produce a second condensed liquid; and (c) collecting the first and second condensed liquids; wherein the condensation means is such as to accept the balance of the latent heat contained in the vapour produced by the first moType: ApplicationFiled: April 25, 2002Publication date: December 5, 2002Inventor: Youssef Hanna Dableh
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Patent number: 6482297Abstract: The present invention relates to an improved process for distilling ammonia from a mixture, more particular from a mixture resulting from the reaction between aminonitrile and water (which reaction is also called cyclizing hydrolysis). The process for distilling the ammonia contained in an aqueous caprolactam solution, uses a column with a bottom temperature less than or equal to 160° C. and at an absolute pressure less than or equal to 5 bar, the ammonia distilled at the top of the column being compressed to a pressure greater than or equal to 10 bar and then condensed at a temperature of 25° C. to 60° C.Type: GrantFiled: June 6, 2001Date of Patent: November 19, 2002Assignee: Rhodia Fiber & Resin IntermediatesInventors: GĂ©rald Bocquenet, Patrick Houssier
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Publication number: 20020166758Abstract: The invention consists of a cost-effective process and facilities for obtaining high quality drinking water and high-grade brine as a chemical raw material from raw water regardless of how much salt it contains. When combined with a thermal power-generation process, the plant also produces electric power with a fuel utilization of over 85%.Type: ApplicationFiled: July 3, 2002Publication date: November 14, 2002Inventor: Peter Vinz
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Patent number: 6471823Abstract: The invention disclosed herein provides methods for monitoring performance and efficiency for multi-effect evaporator systems. The invention also provides methods for monitoring the nonvolatile content of liquid products by determination of a boiling point rise. The invention involves monitoring methods that are improved over previous methods in view of their simplicity, and/or effectiveness, and/or, low cost. The methods of the invention enable system monitoring and problem diagnosis using measurements of a relatively small number of relatively easily accessible process operating parameters.Type: GrantFiled: April 29, 1999Date of Patent: October 29, 2002Assignee: Fisher-Rosemount Systems, Inc.Inventor: Wade C. Stewart
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Patent number: 6472568Abstract: The invention relates to a process for preparing at least one aliphatic monoalcohol, generally in excess, and at least one olefin. The process is performed in a distillation and reaction device having a reaction section and a distillation-reaction section. The distillation-reaction section has a distillation zone with at least one means for circulation of the effluent from the reaction section to the distillation zone. Effluent from the reaction section is circulated to the distillation zone. The distillation-reaction section also has at least one distillation-reaction zone having at least one catalyst bed. The distillation-reaction zone is distinct from the distillation zone and provides at least partly the reflux of the distillation zone. The distillation-reaction section can also have at least one complementary reaction zone containing at least one catalyst bed.Type: GrantFiled: September 7, 2000Date of Patent: October 29, 2002Assignee: Institute Francais du PetroleInventors: Marie-Claire Marion, Alain Forestiere, Christophe Thille, Jean-Charles Viltard
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Publication number: 20020148717Abstract: Device for evaporation and condensation in a closed environment The present invention relates to a device (1) for evaporation and condensation in a closed environment consisting essentially of an evaporation receptacle (2), a heating means (7) for said evaporation receptacle (2) and a condensation receptacle (3) connected in a substantially sealed manner to said evaporation receptacle (2), characterised in that said evaporation (2) and condensation (3) receptacles are connected to each other, at their openings (2′, 3′), extending on either side of a common separation plane (4) in such a way that the arrangement of said receptacles (2, 3) forms substantially an inverted “V” with a sharp point and in that substantially the entire surface area of the wall (6) forming the evaporation receptacle (2) is brought, by said heating means (7), to the same temperature T1 higher than the highest temperature T2 of the wall (5) forming the condensation receptacle (3).Type: ApplicationFiled: April 16, 2002Publication date: October 17, 2002Inventors: Gerard Manhes, Christa Gopel
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Publication number: 20020139656Abstract: There is disclosed a solar still having a hollow, porous absorber body (8), body positioning means (9) to expose the absorber body to solar radiation, feed means (13) to introduce feed liquid into the absorber body, condenser means (14) composed of non-porous material that is substantially transparent to solar radiation, the condenser (14) substantially enveloping the absorber body (8), flow control means (19) to regulate the rate of flow of feed liquid into the absorber body (8), and harvesting means (23) for the removal of distillate from the condenser means (14).Type: ApplicationFiled: February 5, 2002Publication date: October 3, 2002Inventor: Jeffrey Thomas Reid