Batch Distillation Patents (Class 203/DIG11)
  • Patent number: 6165326
    Abstract: A facility for the desalination and purification of sea water or brackish water by solar energy provided with a closed cycle including a thermal solar collector and a heat exchanger in which a heat transfer medium is circulating, and a basin for receiving the sea water or brackish water with the heat exchanger being placed in the basin for heating and evaporating water. A cooling surface is disposed above the basing for condensing the evaporated water which is then diverted to water collectors. The solar collector is located above the cooling surface so as to keep it in the shade.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: December 26, 2000
    Inventor: Johannes Markopulos
  • Patent number: 6010599
    Abstract: An apparatus for batch distilling a liquid at sub-atmospheric pressure, without the aid of a vacuum pump. The apparatus includes an evaporator section having a valved entry port through which a batch of liquid in a first atmospheric condition is added to the evaporator section. A condenser section receives distillate and is in communication with the evaporator section. A valved vent is provided for sealing said apparatus from the outside atmosphere to form a second atmospheric condition which is sealed from the atmosphere after a heating element vaporizes said liquid into an initial sufficient amount of a first vapor to purge the first atmospheric condition from the apparatus through the valved vent. A condenser is disposed for condensing a sufficient amount of the first vapor to form a third atmospheric condition at a pressure below the first atmospheric condition, and for condensing a second vapor to produce distillate.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: January 4, 2000
    Assignee: American Technologies Group, Inc.
    Inventors: Chungsing Wang, Shui-Yiu Lo
  • Patent number: 5993609
    Abstract: A process for the purification of recovered or regenerated phosphorus oxychloride contaminated by reactive organic compounds, by reacting the contaminated phosphorus oxychloride with from 0.1 to 5% by weight of an organic amine, having 1 or 2 tertiary N-atoms and a boiling point above the boiling point of phosphorus oxychloride, at the boiling temperature of the reaction mixture and subsequently carrying out fractional distillation at atmospheric pressure to obtain purified phosphorus oxychloride.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: November 30, 1999
    Assignee: DSM Fine Chemicals Austria GmbH
    Inventors: Karl Schwendinger, Engelbert Kloimstein
  • Patent number: 5837106
    Abstract: A halohydrocarbon solvent recovery process. The process in one embodiment included heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity adsorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: November 17, 1998
    Assignee: Technichem Engineering, Ltd.
    Inventors: Mark J. Ng, Bruce T. Maeda
  • Patent number: 5762762
    Abstract: Water distillation apparatus for convenient domestic use including a housing containing a condenser coil and having a vapor inlet and a distillate outlet. A fan cools and condenses vapor. A boiler is releasably connected to the housing by a vapor discharge outlet in the form of an inwardly-directed cylinder and the vapor inlet has a cooperating spigot termination so that the boiler may be moved away from the vapor inlet and filled with water for batch distillation. The distilland water is heated with an electric heating element and the distillate is discharged through a carbon filter into a discrete glass pitcher adjacent to the boiler. The arrangement permits easy removal of the boiler from the housing for filling with distilland or cleaning, as well as the convenient replacement of the boiler in the housing afterwards.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: June 9, 1998
    Assignee: The Breithaupt Family Trust
    Inventors: Walter T. Breithaupt, Richard Merritt
  • Patent number: 5500095
    Abstract: A high efficiency batch sulfuric acid reprocessor system that is capable of producing high purity acid through distillation. Methods of use are also provided. The distillation is monitored and controlled in accordance with temperatures of the system, in particular, the temperature of the column and the temperature of the vapor in a condensing chamber. A stream splitter enables the invention to selectively collect high purity product as well as remove waste or recycle condensate as reflux.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: March 19, 1996
    Assignee: Athens Corporation
    Inventors: Robert T. Shinagawa, Susan M. Jordan, Christopher S. Blatt
  • Patent number: 5472576
    Abstract: A method for the production of an industrial diluent which includes the steps of heating a liquid waste from a facility that manufactures coatings, inks, lacquers, adhesives, or dyes in a mixer-reactor to generate a vapor, flowing the vapor into a distillation column, distilling the vapor to form distillation components, and transferring each component to a tank designated for such component. The method may include the additional steps of mixing at least two of the components in a predetermined amount, and thoroughly mixing the liquid waste during the heating step. The heating step is preferably effected by applying heat substantially uniformly to the liquid waste.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: December 5, 1995
    Inventor: Anwar E. Berberi
  • Patent number: 5413681
    Abstract: A process useful for the recovery of terephthalic acid and ethylene glycol from poly(ethylene terephthalate) or its copolymers. The process is economical, beneficial to the environment and provides polymer grade terephthalic acid and ethylene glycol from post-consumer resin. The process is a six-step process including: (1) contacting a resin containing poly(ethylene terephthalate) with water at elevated temperature and pressure, (2) cooling the resulting mixture to provide a solid portion containing terephthalic acid and a liquid portion containing ethylene glycol, (3) recovery of the ethylene glycol from the liquid portion by distillation, (4) recovery of the terephthalic acid by heating the solid portion in the presence of water vapor at elevated temperature to produce a vapor containing terephthalic acid and water, (5) cooling terephthalic acid water vapor mixture to a temperature below the dew point of terephthalic acid and (6) collecting the polymer grade terephthalic acid.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: May 9, 1995
    Assignee: Eastman Chemical Company
    Inventors: Gerald C. Tustin, Thomas M. Pell, Jr., David A. Jenkins, Mary T. Jernigan
  • Patent number: 5346595
    Abstract: The invention generally relates to a process for the purification of a component of a binary azeotrope in which the composition of the azeotrope changes by about 10 mole percent with pressure comprising:(a) subjecting a binary azeotrope to a distillation step in which most of one of the binary components is removed as distillate (distillate 1) with the bottoms (bottoms 1) enriched in the other component;(b) subjecting distillate 1 to at least one additional distillation step conducted at a different pressure in which most of the component recovered as bottoms 1 is removed as distillate 2 with the bottoms 2 enriched in the component enriched in distillate 1;(c) optionally repeating step (b) as many times as desired; and(d) recovering the desired purified component.The invention is particularly useful in the purification of pentafluoroethane in a pentafluoroethane/chloropentafluoroethane azeotrope.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: September 13, 1994
    Assignee: AlliedSignal Inc.
    Inventors: Paul G. Clemmer, Hsueh S. Tung, Addison M. Smith
  • Patent number: 5334291
    Abstract: An apparatus for removing non-volatile residues and impurities from a used solvent includes a self-scrubbing heating distillation subassembly for separating purified solvent for reuse and a controlled waste collector subassembly for overflowing concentrated residues and impurities stripped from the used solvent into an easy-to-service container. The apparatus may be disposed in a parallel in-line relationship with a circulating solvent flow circuit, such as in a dry cleaning operation, to continuously withdraw and purify aliquot portions of the circulating solvent stream, returning good solvent back to the flow circuit and concentrating non-volatile residues and impurities to a removable, environmentally sound serviceable container.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: August 2, 1994
    Assignee: Safety-Kleen Corp.
    Inventors: Gilbert Gavlin, William M. Langdon, deceased, Boris Goltsin, Gunther Erlebacher, Douglas A. Larson
  • Patent number: 5273623
    Abstract: Process for vacuum-concentrating urea solutions in which the final step of evaporation of the urea solution under vacuum is carried out within the injection of overheated water vapor in the overhead portion of the concentrator, in order to counteract the formation and deposition of high-melting, fouling compounds derived from urea.
    Type: Grant
    Filed: April 18, 1991
    Date of Patent: December 28, 1993
    Assignee: Snamprogetti, S.p.A.
    Inventor: Franco Granelli
  • Patent number: 5225048
    Abstract: The invention relates to a distillation method and an apparatus for the concentration and purification of water-containing liquid chemicals. The distillation is performed using constant, predetermined distillation parameters.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: July 6, 1993
    Assignee: Athens Corp.
    Inventor: Wallace I. Yuan
  • Patent number: 5207874
    Abstract: The purification by distillation of glycidyl (meth)acrylate containing light products containing epichlorohydrin and light impurities, and heavy impurities comprises: in a first stage, a distillation of the glycidyl (meth)acrylate to be purified is conducted in the presence of a first solvent, e.g., water, capable of forming a low boiling point heteroazeotrope with the light impurities and epichlorohydrin, so as to obtain a head fraction which consists essentially of a solvent-light products heteroazeotrope; and, in a second stage, the glycidyl (meth)acrylate thus freed from the light products is subjected to a distillation in the presence of a second solvent, e.g.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: May 4, 1993
    Assignee: Atochem
    Inventors: Raymond Hess, Christian Lacroix
  • Patent number: 5162081
    Abstract: A method for distillation of a multiple-component liquid/solid system, for example, used engine coolant at two different vaporizing pressures. One component, for example, water, is separated into one distillate stream at a first pressure and the other component, for example, ethylene glycol, is separated into another distillate stream at a second pressure. Each distillate stream is directed toward an individual storage tank.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: November 10, 1992
    Assignee: Finish Thompson Inc.
    Inventor: H. David Bowes
  • Patent number: 5059288
    Abstract: High purity isopropyl acetate and ethanol are recovered from a process stream containing isopropyl acetate, ethanol and water by a multiple step process including extracting substantially all of the ethanol from the stream using water as a solvent, stripping the extract stream to remove substantially all of the remaining isopropyl acetate as an overhead recycle stream, which is combined with the fresh feed stream prior to the extraction step, fractionating the ethanol-rich stripping column bottoms stream to produce a ethanol-water azeotropic overhead stream and using a portion of the fractionating column bottoms stream as the solvent for the extraction step.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: October 22, 1991
    Assignee: Harborchem
    Inventor: William J. Curry
  • Patent number: 5053111
    Abstract: A method and apparatus for automatically and sequentially distilling batches of water having substantially equal volumes in a plurality of distillation cycles, one batch in each cycle. During each cycle, water is admitted to a boiler tank for a fixed interval of time to form a batch in the tank. The batch of water in the tank is then vigorously boiled while venting the tank through a pipe to the atmosphere. The vigorous boiling is terminated when the temperature within the vent pipe reaches the boiling point of pure water. Upon termination of the vigorous boiling phase, a gentle boiling phase is initiated, the vent pipe is closed, and vapor in the tank is admitted to a condenser. The condenser condenses the vapor to obtain distilled water which is collected in a collection device. The gentle boiling phase continues until the level of water in the tank recedes to the level of a heater in the tank.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: October 1, 1991
    Inventor: William R. Ellerbe, Jr.
  • Patent number: 5028297
    Abstract: A thin-film evaporator for preparing liposomes in commercial quantities provides a film-forming zone of uniform thickness which enables the uniform evaporation of an organic solvent to form a film of uniform thickness, followed by in situ hydration of the film in an aqueous phase by agitation with a rotor.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: July 2, 1991
    Assignee: Vestar, Inc.
    Inventor: Kevin R. Bracken
  • Patent number: 5021128
    Abstract: A control for a water distillation apparatus admits untreated feed water to the boiling tank in response to a demand for the production of distilled water and operates the heater to produce steam. Level probes in the boiling tank monitors the level of untreated water in the boiling tank and admits more feed water as necessary. When demand for production of distilled water has ceased, the heater is deenergized and the boiling tank is filled to dilute the residual water in the tank and lower its temperature prior to drainage to prevent damage to a plastic house drain. In a preferred embodiment, feed water is admitted to the boiling tank in large batches and the production of distilled water continues uninterrupted until the entire batch is distilled to conserve heat energy even if demand ceases during such batch distillation. A cleaning mode is provided to remove scale from the interior of the boiling tank with a simplified manual cleaning procedure.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: June 4, 1991
    Assignee: Pure Water, Inc.
    Inventor: David G. Palmer
  • Patent number: 5004522
    Abstract: A method of treating photographic process waste liquor through concentration by evaporation, including heating an upper part of photographic process waste liquor to concentrate by evaporation the photographic process waste liquor in such a manner that the difference between the temperature of the photographic process waste liquor in the vicinity of the heated part and the temperature at a bottom part of the photographic process waste liquor may become C. or more, and causing a solute in the photographic process waste liquor to settle.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: April 2, 1991
    Assignee: Konica Corporation
    Inventors: Shigeharu Koboshi, Kazuhiro Kobayashi, Nobutaka Goto, Masayuki Kurematsu, Naoki Takabayashi
  • Patent number: 4985122
    Abstract: Method and apparatus for separating volatile contaminants from a liquid to be continuously distilled. A continuous still comprises evaporator (1) having a heating coil (2), and condensor coil (6), and distillate collector (5). An entrainment device (11) removes distillate (13) from collector (5) via line (10) and reduces pressure in evaporator (1). Feed liquid (21) containing volatile contaminants is charged batchwise to a pre-chamber (20) at sub-atmospheric pressure which is then sealed (valve 22) from feed supply (21). Volatile contaminants are extracted from the charge in prechamber (20) via line (26) and entrainment device (32). Pre-chamber (20) is subsequently placed in communication (via valve 25) with evaporator (1) whereby to equilibrate pressure between evaporator (1) and pre-chamber (20).
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: January 15, 1991
    Assignee: Vaqua Limited
    Inventor: Colin W. Spencer
  • Patent number: 4911793
    Abstract: N-Ethylpiperazine is isolated by distillation from a mixture consisting per 100 kg ofa=from 30 to 90 kg of N-ethylpiperazineb=from 7 to 40 kg of N,N'-diethylpiperazinec=from 3 to 20 kg of piperazined=from 0 to 30 kg of ethanole=from 0 to 40 kg of water andf=from 0 to 5 kg of concomitants,by performing the distillation in the presence of x=y+e= from 3b to 12b of water, y being the quantity of water which has to be added, if necessary, to meet this condition, and successively separating from this mixture the fractions1. water, ethanol, N,N'-diethylpiperazine and other highly volatile concomitants,2. water, if present in excess,3. piperzine and4. pure N-ethylpiperazineas overhead products.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: March 27, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Dieter Franz
  • Patent number: 4842696
    Abstract: Pentachloronitrobenzene (PCNB) which initially contains in excess of 0.5% hexachlorobenzene (HCB) is purified by distilling the impure PCNB at a temperature between C. and a pressure below or at atmospheric pressure to obtain a PCNB product having a HCB content lower than 0.5%, and preferably lower than 0.1%.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: June 27, 1989
    Assignee: Quimica Organica De Mexico, S.A. De C.Y.
    Inventor: Arturo S. Cazares
  • Patent number: 4810330
    Abstract: Deodorizing and/or physical refining of relatively small, varying charges of high-boiling liquids, viz. fatty acids, edible oils, fats, glycerides and other high-boilding esters, is conducted continuously in a single-stage or multi-stage falling-film column (20) through the trickle passages (23) of which stripping steam is passed in counter-current flow. In the supply conduit (15, 15', 15", 15'") leading to the falling-film column and in the discharge conduit (30, 30', 30", 30'") leading away from the bottom (26) of the falling-film column a plug-flow of the liquid is maintained. Upon a change of charge the fresh liquid to be treated is normally introduced into the supply conduit--without any blank charge--directly following the liquid of the preceding charge. Charging of the liquid onto the deflector (22) in the head (21) of the falling-film column is interrupted for a short period of time when the front of the liquid of the fresh charge has reached a check valve (16) disposed adjacent said deflector.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: March 7, 1989
    Inventor: Hermann Stage
  • Patent number: 4795824
    Abstract: A process is described for the production of a dialkyl maleate by reaction of maleic anhydride with an alkyl alcohol in a monoesterification zone to form the corresponding monoalkyl maleate, followed by reaction of resulting monoalkyl maleate with further alkyl alcohol to form the corresponding dialkyl maleate, which includes the steps of supplying a first liquid feed comprising said monoalkyl maleate to a secondary esterification zone containing a charge of a solid esterification catalyst, supplying a second feed stream comprising said alkyl alcohol to said secondary esterification zone, maintaining said secondary esterification zone at an elevated temperature sufficient to form or to maintain therein a vaporous stream containing said alkyl alcohol, intimately contacting said first liquid feed in said secondary esterification zone in the presence of said catalyst with said vaporous feed stream, recovering from said secondary esterification zone a vaporous effluent stream containing, in addition to alkyl alco
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: January 3, 1989
    Assignee: Davy McKee (London) Limited
    Inventors: John W. Kippax, Colin Rathmell
  • Patent number: 4664755
    Abstract: Process for the purification of crude .beta.-phenylethyl alcohol by azeotropic distillation in the presence of alkanolamines in which the alkylene chain contains 2 to 4 carbon atoms and is optionally substituted by 1 to 4 C.sub.1 -C.sub.3 -alkyl groups.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: May 12, 1987
    Assignee: Haarman & Reimer GmbH
    Inventors: Jurgen Nienhaus, Rudolf Hopp
  • Patent number: 4664754
    Abstract: An apparatus and method for continuously separating and recovering an organic liquid such as a hydrocarbon solvent from immiscible water and/or other impurities mixed therewith. The apparatus and method comprise a system for treating liquids while continuously flowing therethrough, including in series a gravity separation step followed by a distillation separation step.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: May 12, 1987
    Assignee: General Electric Company
    Inventors: Roger W. Caputi, Edward G. Pierick, Dennis V. Brumley, Charles B. Kincaid
  • Patent number: 4608127
    Abstract: Separation and recovery of dibenzofuran of high purity is accomplished by distilling a coal tar fraction having boiling point range of to C. thereby producing a dibenzofuran fraction having a dibenzofuran content of not less than 30% by weight, a dibenzofuran/acenaphthene molar ratio of not less than 1.3, and a fluorene/dibenzofuran molar ratio of not more than 0.05, then introducing the dibenzofuran fraction obtained as described above into a continuous crystallization purification unit provided with a cooling zone for crystallization of the feed, a heating zone for melting the purified crystals, and a refining zone for enabling crystals being transferred from said cooling zone to said heating zone to come into counter current contact with a mass of molten crystals midway along the path between said two zones, and subjecting the dibenzofuran fraction to continuous crystallization purification therein.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: August 26, 1986
    Inventors: Kiyoshi Sakuma, Tadao Tomioka, Sunao Tabuchi, Kihachiro Ohta, Masakazu Takeuchi
  • Patent number: 4556460
    Abstract: A process and apparatus for dewatering an ethanol-water solution is disclosed wherein a carrier gas is used to vaporize the solution and transport the vapors to a sorbent where water is sorbed in preference to ethanol. The invention is particularly suited for small-scale production of fuel-grade ethanol for blending with gasoline.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: December 3, 1985
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: George H. Robertson, Attila E. Pavlath
  • Patent number: 4534830
    Abstract: A method for recovering clean solvent from a mixture of solvent and contaminants. An open top tank is mounted in a housing below a sink in which articles to be cleaned with solvent are placed. The sink has a tap through which solvent is directed so that the articles can be cleaned by hand in the sink itself. A disposable, plastic bag is receivable in the tank and the tank is closed by a cover. Contaminated solvent can flow from the sink, through the cover and into the bag in the tank. Contaminated solvent in the bag is heated by heating a liquid surrounding the side wall of the tank and below the bottom of the tank so that the solvent in the bag will vaporize. A tube leading out of the tank carries solvent vapor into a heat exchanger where the vapor is condensed to form clean, liquid solvent, and the liquid solvent is collected in a reservoir. A pump is coupled to the reservoir for pumping liquid solvent to the tap at the sink. The bag can be disposed of after the solvent has been vaporized therefrom.
    Type: Grant
    Filed: October 5, 1983
    Date of Patent: August 13, 1985
    Assignee: Zerpa Industries, Inc.
    Inventor: Manuel G. Pastor
  • Patent number: 4479851
    Abstract: An improved process for the batch distillation or purification by stripping of a bis(hydroxyalkyl)disiloxane, which purified product is useful as a video disc lubricant additive or dopant. In accordance with the process, the feedstock of bis(hydroxyalkyl)disiloxane is subjected to a vacuum evaporation of the light volatiles by gradually reducing the pressure to about 2.times.10.sup.-1 Torr. After the low boiling materials have been distilled off, the temperature is gradually increased and the pressure gradually reduced (final temperature of about C. and final pressure of about 4.times.10.sup.-2 Torr) so as to produce a distill and having a viscosity of about 210.+-.30 centipoise at C.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: October 30, 1984
    Assignee: RCA Corporation
    Inventors: Thomas E. Smith, Chih C. Wang
  • Patent number: 4470880
    Abstract: A method is provided for separating a liquid mixture into its aqueous and non-aqueous liquid phases. The method comprises the steps of introducing the liquid mixture into a gas-tight vessel; rotating the vessel at a surface speed of approximately 19 to 190 ft/min (0.095 to 0.950 m/s) to cause filming of the liquid composition, while simultaneously heating the vessel to cause the aqueous phase to evaporate; removing the water vapor under vacuum; and condensing the water vapor for removal.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: September 11, 1984
    Assignee: Allied Corporation
    Inventor: Charles S. Ward
  • Patent number: 4401512
    Abstract: A batch distillation operation is automatically controlled from a start-up mode to a shut-down mode.
    Type: Grant
    Filed: March 5, 1982
    Date of Patent: August 30, 1983
    Assignee: Phillips Petroleum Company
    Inventor: Merle R. Likins, Jr.
  • Patent number: 4345972
    Abstract: An improved condenser for distillation purposes which is particularly suited for use in distilling alcohol. The condenser is in the form of a cylinder, open at its ends, and formed of a double jacket wall of spaced concentric cylindrical sheets, preferably of copper or aluminum metal. The jacket interior is joined at an upper end to an inlet pipe fitting that may be coupled to tube leading from a mash cooker unit. A drain tube for the distilled alcohol-water mixture extends from the bottom end of the jacket interior. A plurality of spaced legs extend from the periphery of the lower open end of the cylinder so that in use the condenser is mounted with its central axis extending on a vertical line, and with the open cylinder and located above the surface to which the cylinder legs rest or are fixed.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: August 24, 1982
    Inventors: Tilda M. Hannebaum, Harold W. Hannebaum
  • Patent number: 4277316
    Abstract: Solvents are separated from solvent bearing material by feeding the material to the open end of a reactor vessel rotatable about a substantially horizontal axis. The vessel has internal vanes operable to move the material from the open end towards the closed other end of the vessel when the vessel is rotated in one direction, and to move the material towards the open end when the vessel is rotated in the opposite direction. The reactor vessel is heated to a predetermined temperature while rotating the vessel in the one direction to cause solvent to be distilled from the material, and distilled gases are collected from the open end of the vessel and subsequently cooled to condense the distillate. The heating of the vessel is continued to a temperature high enough to produce a free-flowing residue when the reactor vessel is cooled. The vessel is then cooled and rotated in the opposite direction to cause the residue to be discharged from the open end of the vessel.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: July 7, 1981
    Inventor: Robert A. Taylor
  • Patent number: 4131742
    Abstract: A process for the liquid phase oxidation of hydrocarbons with a molecular oxygen-containing gas in the presence of a dissolved cobalt salt catalyst characterized in that the oxidation is carried out in the substantial absence of chromium in the reaction medium i.e. a concentration of chromium in the liquid phase of not greater than 400 ppm.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: December 26, 1978
    Assignee: BP Chemicals Limited
    Inventor: Barry Hudson
  • Patent number: 4131741
    Abstract: In a process for the production of oxygenated organic compounds including a substantial proportion of acetic acid by oxidizing a C.sub.3 to C.sub.7 saturated aliphatic hydrocarbon in the liquid phase with molecular oxygen in the presence of an inert reaction medium and a cobalt catalyst, between 5 and 90% in a continuous reaction and 11 and 90% in a batch reaction of the cobalt being introduced in the +3 oxidation state, the improvement comprising separating the catalyst solution fraction from the fraction comprising oxygen-containing compounds and water by distillation while limiting the residence time of the catalyst solution fraction in the distillation zone so that it is the minimum consistent with substantially complete separation of the fractions thereby minimizing the reduction of Co.sup.+3 to Co.sup.+2.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: December 26, 1978
    Assignee: BP Chemicals Limited
    Inventors: John S. Bartlett, Barry Hudson
  • Patent number: 4086267
    Abstract: A process for the production of oxygenated organic compounds including a substantial proportion of acetic acid by oxidizing a C.sub.3 to C.sub.7 saturated aliphatic hydrocarbon in the liquid phase with molecular oxygen in the presence of an inert reaction medium and a cobalt catalyst, between 5 and 90% in a continuous reaction and 11 and 90% in a batch reaction of the cobalt being introduced in the +3 oxidation state. The process is particularly applicable to the embodiment wherein the catalyst solution is recycled to the oxidation reaction. In order to achieve this a low-residue time distillation unit is preferably employed.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: April 25, 1978
    Assignee: BP Chemicals Limited
    Inventors: John Stanley Bartlett, Barry Hudson, John Pennington
  • Patent number: 4071398
    Abstract: A continuous, low cost method of concentrating dilute streams containing fractions of adsorbable chemicals is disclosed which minimizes heat consumption and provides highly concentrated supplies of valuable chemicals which are suitable for reuse or sale without substantial further processing. The methods hereof are particularly adapted for concentrating waste condensates derived from pulp-making operations such as the Kraft or sulfite processes, but in general are also applicable for treating a wide variety of dilute organic or inorganic adsorbable chemicals.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: January 31, 1978
    Assignee: Flambeau Paper Company
    Inventor: Kenneth W. Baierl
  • Patent number: RE35107
    Abstract: High purity isopropyl acetate and ethanol are recovered from a process stream containing isopropyl acetate, ethanol and water by a multiple step process including extracting substantially all of the ethanol from the stream using water as a solvent, stripping the extract stream to remove substantially all of the remaining isopropyl acetate as an overhead recycle stream, which is combined with the fresh feed stream prior to the extraction step, fractionating the ethanol-rich stripping column bottoms stream to produce a ethanol-water azeotropic overhead stream and using a portion of the fractionating column bottoms stream as the solvent for the extraction step.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: December 5, 1995
    Assignee: Harborchem
    Inventor: William J. Curry