Carbamate Reactant (i.e., Reactant Contains -o-c(=o)-nh- Group (wherein Substitution May Be Made For Hydrogen Only) Patents (Class 560/345)
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Patent number: 11306055Abstract: An isocyanate production method is characterized by having: a carbamation step in which a carbonic acid ester, an inorganic acid salt of an amino acid derivative, and a basic compound are reacted to obtain a reaction mixture containing a carbamic acid ester derived from the carbonic acid ester, a hydroxy compound derived from the carbonic acid ester, and the carbonic acid ester; and a thermal decomposition step in which the carbamic acid ester is subjected to a thermal decomposition reaction to obtain an isocyanate.Type: GrantFiled: May 15, 2018Date of Patent: April 19, 2022Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Nobuhisa Miyake, Yuji Kosugi, Yusuke Sakurai, Masaaki Shinohata
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Patent number: 11174222Abstract: Provided is a process for preparing an organic diisocyanate of the formula: OCN—R—NCO (1), wherein R represents a bivalent hydrocarbon radical containing 3 to 20 carbon atoms, the carbon atoms being arranged in a way that the two nitrogen atoms are separated from each other by at least 3 carbon atoms, the process comprising, Step (I) preparing a diurethane of the formula wherein R is the same as in formula (1), R? and R? independently represent organic radicals selected from the group consisting of 4 to 36 carbon atoms, 4 to 74 hydrogen atoms, 0 to 12 oxygen atoms that have the oxidation state ?2, and 0 to 1 halogen atoms from a diarylurethane of the formula, wherein R is the same as in formula (1), Ar and Ar? independently represent a substituted or unsubstituted aryl or heteroaryl radical selected from the group containing a total of 4 to 20 carbon atoms by transesterification, Step (II) subjecting the diurethane of the formula (2) to a cleavage reaction to form the hydroxy compounds R?—OH and R?—OType: GrantFiled: September 12, 2018Date of Patent: November 16, 2021Assignee: Covestro Deutschland AGInventor: Michael Merkel
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Patent number: 10858310Abstract: The invention relates to a method for producing an isocyanate, wherein a carbamate or thiolcarbomate is converted, in the presence of a catalyst, with separation of an alcohol or thioalcohol, at a temperature of at least 150° C., to the corresponding isocyanate, wherein a compound of the general formula (X)(Y)(Z—H) is used as a catalyst, in particular characterized in that the compound has both a proton donor function and a proton acceptor function. In the catalysts according to the invention, a separable proton is bound to a heteroatom, which is more electronegative than carbon. Said heteroatom is either identical to Z or a component thereof. In the catalysts according to the invention, there is additionally a proton acceptor function which is either identical to X or a component thereof. According to the invention, the proton donator and proton acceptor function are connected to each other by the bridge Y.Type: GrantFiled: August 31, 2018Date of Patent: December 8, 2020Assignee: Coverstro Deutschland AGInventors: Daniela Cozzula, Andreas Ernst, Matthias Leven, Walter Leitner, Thomas Ernst Mueller, Christoph Guertler, Stefan Wershofen, Gernot Jaeger, Franz Beggel, Jens Langanke
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Patent number: 10618871Abstract: The present invention relates to a process for producing isocyanates in process chains, each of which produce an isocyanate end product via at least one intermediate product, wherein the heat energy liberated in a first production plant in a heat-emitting operation of producing an intermediate product, an isocyanate end product or a catalyst required for a substep of the process chain (first chemical product) is at least partly utilized for generating vapour, in particular water vapour, having a pressure of 1.31 bar(abs.) to 1.91 bar(abs.) and a temperature of 107° C. to 119° C. and the thus generated vapour is employed for performing a heat-consuming operation in the preparation of another chemical product (second chemical product) in a second production plant.Type: GrantFiled: August 15, 2017Date of Patent: April 14, 2020Assignee: Covestro Deutschland AGInventors: Jürgen Spriewald, Richard Adamson, Thomas Knauf
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Patent number: 9884810Abstract: Disclosed is a method for separating, with a multi-stage distillation column, a mixture containing an active hydrogen-containing compound (A) and a compound (B) that reversibly reacts with the active hydrogen containing compound (A), the method comprising distillation-separating the active hydrogen-containing compound (A) and the compound (B) with the multi-stage distillation column in the presence of an intermediate-boiling-point inactive compound (C) that has a normal boiling point between a normal boiling point of the active hydrogen-containing compound (A) and a normal boiling point of the compound (B) and is chemically inactive for both of the (A) and the compound (B).Type: GrantFiled: October 4, 2011Date of Patent: February 6, 2018Assignee: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Patent number: 9233918Abstract: An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.Type: GrantFiled: May 15, 2008Date of Patent: January 12, 2016Assignee: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Patent number: 9000213Abstract: A process for coproducing di- and/or polyisocyanates and glycols, comprising process stages A, B, C and E for preparing glycols and process stages A, C, D, E, F and G for preparing di- and/or polyisocyanates, which comprises accomplishing the material coupling via the separation of the reaction mixture obtained in process stage A into process stages B and C, by in process stage A, reacting an aqueous alkylene oxide with carbon dioxide to give a reaction mixture comprising alkylene carbonate, hydrolyzing a portion of the alkylene carbonate-comprising reaction mixture obtained in process stage A to glycol in process stage B, dewatering the remaining alkylene carbonate-comprising stream of the reaction mixture from process stage A in process stage C, in process stage D, synthesizing amine by hydrogenating an aromatic nitro compound or a nitrile, in process stage E, transesterifying the dewatered alkylene carbonate-comprising mixture from process stage C with a monohydroxy alcohol to give the corresponding diaType: GrantFiled: October 27, 2010Date of Patent: April 7, 2015Assignee: BASF SEInventors: Michael Bock, Robert Baumann, Axel Franzke, Eckhard Stroefer, Gerhard Theis
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Patent number: 8957241Abstract: A method for producing a carbonyl compound of the present invention comprises a step (X) of reacting a specific compound having a urea bond with a carbonic acid derivative having a carbonyl group (—C(?O)—) under heating at a temperature equal to or higher than the thermal dissociation temperature of the urea bond to obtain the carbonyl compound.Type: GrantFiled: February 21, 2012Date of Patent: February 17, 2015Assignee: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Patent number: 8940926Abstract: A method for producing carbamate including a urea production step; a carbamate-forming step; an ammonia separation step of absorbing the gas with water in the presence of carbonate to produce a gas absorption water, and separating ammonia; an aqueous alcohol solution separation step of separating an aqueous alcohol solution from the gas absorption water; an ammonia/carbon dioxide separation step of separating carbon dioxide gas from the aqueous ammonia solution in the gas absorption water from which the aqueous alcohol solution is separated; an aqueous ammonia solution reusing step of mixing the aqueous ammonia solution and carbonate with the water to be used for production of the gas absorption water.Type: GrantFiled: May 19, 2011Date of Patent: January 27, 2015Assignee: Mitsui Chemicals, Inc.Inventors: Koji Takamatsu, Satoshi Kato, Takeshi Fukuda, Tetsuya Nakano, Masaaki Sasaki
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Patent number: 8927763Abstract: The present invention relates to a method for preparing an aliphatic diisocyanate by pyrolyzing an aliphatic dicarbamate in liquid phase, using a tin (II) or (IV) compound as a catalyst and a zwitterionic compound as a stabilizer, thereby remarkably inhibiting high-boiling by-products and providing the aliphatic diisocyanate with high yield.Type: GrantFiled: December 4, 2012Date of Patent: January 6, 2015Assignee: University-Industry Cooperation Group of Kyung Hee UniversityInventors: Hoon Sik Kim, Heehwan Kim, Ji Young Oh, Seunghoon Shin, Seok Soo Kim, Kyung Sik Lim, Jung Dae Choi
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Patent number: 8895774Abstract: An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene.Type: GrantFiled: May 15, 2008Date of Patent: November 25, 2014Assignee: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Patent number: 8859805Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric polyurethanes and thermal dissociation of the latter, in which the polyisocyanates produced and unusable residues are separated off at particular stages of the reaction and reusable by-products and intermediates are recirculated to preceding stages.Type: GrantFiled: September 9, 2010Date of Patent: October 14, 2014Assignee: BASF SEInventors: Torsten Mattke, Matthias Kloetzer, Eckhard Stroefer, Bernhard Geissler, Peter Zehner
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Publication number: 20140303399Abstract: The present invention relates to a method for preparing an aliphatic diisocyanate by pyrolyzing an aliphatic dicarbamate in liquid phase, using a tin (II) or (IV) compound as a catalyst and a zwitterionic compound as a stabilizer, thereby remarkably inhibiting high-boiling by-products and providing the aliphatic diisocyanate with high yield.Type: ApplicationFiled: December 4, 2012Publication date: October 9, 2014Applicant: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Hoon Sik Kim, Heehwan Kim, Ji Young Oh, Seunghoon Shin, Seok Soo Kim, Kyung Sik Lim, Jung Dae Choi
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Patent number: 8835673Abstract: Process for preparing aromatic isocyanates by reacting the corresponding formamides with an oxygen-comprising gas over noble metal catalysts at temperatures of from 300 to 600° C. and a contact time of from 1 to 1000 ms, wherein: a. the formamide is vaporized before entering the reaction zone, b. the reaction mixture obtained is quenched with an alcohol-comprising quenching liquid and c. the urethane formed is dissociated into isocyanate and alcohol.Type: GrantFiled: December 3, 2010Date of Patent: September 16, 2014Assignee: BASF SEInventors: Torsten Mattke, Eckhard Stroefer, Julia Leschinski, Radwan Abdallah, Axel Franzke, Michael Bock
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Patent number: 8822718Abstract: A process is proposed for preparing isocyanates by thermally cleaving carbamates to obtain a carbamate cleavage gas comprising the corresponding isocyanate and the corresponding alcohol, which comprises quenching the carbamate cleavage gas in the presence of an ether which functions as an inhibitor for the reverse reaction of the isocyanate with the alcohol.Type: GrantFiled: November 30, 2010Date of Patent: September 2, 2014Assignee: BASF SEInventors: Michael Bock, Eckhard Stroefer, Robert Baumann, Axel Franzke, Joachim Pfeffinger
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Publication number: 20140194650Abstract: The present invention is a method for producing an N-substituted carbamic acid ester derived from an organic amine from an organic amine, a carbonic acid derivative and a hydroxy composition containing one or more types of hydroxy compounds, wherein the organic amine, the carbonic acid derivative and the hydroxy composition are reacted using a urethane production reaction vessel provided with a condenser, a gas containing the hydroxy composition, the compound having the carbonyl group derived from the carbonic acid derivative, and an ammonia formed as a by-product in the reaction, is introduced into the condenser provided in the urethane production reaction vessel, and the hydroxy composition and the compound having the carbonyl group derived from the carbonic acid derivative are condensed, and wherein a stoichiometric ratio of a hydroxy compound contained in the condensed hydroxy composition to the condensed compound having the carbonyl group derived from the carbonic acid derivative is 1 or more, and a ratiType: ApplicationFiled: January 9, 2014Publication date: July 10, 2014Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masaaki Shinohata, Nobuhisa Miyake
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Patent number: 8748654Abstract: A method for producing tolylene diisocyanate includes: mixing a first diaminotoluene containing 2,4-diaminotoluene and 2,6-diaminotoluene at a first isomer ratio and a second diaminotoluene containing 2,4-diaminotoluene and/or 2,6-diaminotoluene at a second isomer ratio that is different from the first isomer ratio so as to prepare mixed diaminotoluene; producing tolylene dicarbamate by reaction of the mixed diaminotoluene, urea and/or N-unsubstituted carbamic acid ester and alcohol; and thermally decomposing the tolylene dicarbamate.Type: GrantFiled: April 6, 2012Date of Patent: June 10, 2014Assignee: Mitsui Chemicals, Inc.Inventors: Koji Takamatsu, Kazuhiro Kosumi, Takeshi Fukuda, Masaaki Sasaki
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Patent number: 8680323Abstract: The invention relates to a process for preparing isocyanates by thermal dissociation of carbamates and separation by distillation of the reaction mixture from the carbamate dissociation, comprising the corresponding isocyanate and the corresponding alcohol, by distillation in a column (K) having an enrichment section (V) and a stripping section (A), where the carbamate (1) is introduced between the enrichment section (V) and the stripping section (A) and the isocyanate is taken off as a constituent of the bottom stream (2) and the alcohol is taken off as a constituent of the overhead stream (3) from the column (K), in the presence of an inert solvent, wherein an intermediate boiler having a boiling point between the boiling point of the isocyanate and the boiling point of the alcohol under the operating conditions of the carbamate dissociation is used as inert solvent and is fed as external runback (4) in liquid form in a purity of >95% by weight, based on the total weight of the external runback (4), in tType: GrantFiled: January 18, 2011Date of Patent: March 25, 2014Assignee: BASF SEInventors: Michael Bock, Axel Franzke, Robert Baumann, Eckhard Stroefer
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Publication number: 20140073811Abstract: A method for producing tolylene diisocyanate includes: mixing a first diaminotoluene containing 2,4-diaminotoluene and 2,6-diaminotoluene at a first isomer ratio and a second diaminotoluene containing 2,4-diaminotoluene and/or 2,6-diaminotoluene at a second isomer ratio that is different from the first isomer ratio so as to prepare mixed diaminotoluene; producing tolylene dicarbamate by reaction of the mixed diaminotoluene, urea and/or N-unsubstituted carbamic acid ester and alcohol; and thermally decomposing the tolylene dicarbamate.Type: ApplicationFiled: April 6, 2012Publication date: March 13, 2014Applicant: MITSUI CHEMICALS, INCInventors: Koji Takamatsu, Kazuhiro Kosumi, Takeshi Fukuda, Masaaki Sasaki
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Publication number: 20130317238Abstract: The present disclosure generally relates to processes, apparatuses and custom catalysts designed to depolymerize a polymer. In one embodiment, the present invention relates to a de-polymerizing apparatus, catalysts and reaction schemes to obtain useful monomers including fuel products by “in situ” reactions using coupled electromagnetic induction.Type: ApplicationFiled: December 8, 2011Publication date: November 28, 2013Inventors: Pravansu S. Mohanty, Swaminathan Ramesh
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Patent number: 8513453Abstract: The invention is directed to a process for preparing aromatic carbamates which comprises the reaction of an aromatic amine with an organic carbonate in the presence of a catalyst characterized in that Zn4O(OAc)6 is used as catalyst.Type: GrantFiled: March 12, 2010Date of Patent: August 20, 2013Assignee: Bayer MaterialScience AGInventors: Stefan Wershofen, Stephan Klein, Anton Vidal-Ferran, Elisenda Reixach, Francese Xavier Rius-Ruiz
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Patent number: 8492580Abstract: The invention relates to an improved multistage process for the continuous preparation of diisocyanates by reaction of the corresponding diamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric urethanes and thermal dissociation of the latter.Type: GrantFiled: August 2, 2010Date of Patent: July 23, 2013Assignee: BASF SEInventors: Bernhard Geissler, Eckhard Stroefer, Andreas Schmidt, Matthias Kloetzer
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Publication number: 20130184488Abstract: Disclosed is a method for separating, with a multi-stage distillation column, a mixture containing an active hydrogen-containing compound (A) and a compound (B) that reversibly reacts with the active hydrogen containing compound (A), the method comprising distillation-separating the active hydrogen-containing compound (A) and the compound (B) with the multi-stage distillation column in the presence of an intermediate-boiling-point inactive compound (C) that has a normal boiling point between a normal boiling point of the active hydrogen-containing compound (A) and a normal boiling point of the compound (B) and is chemically inactive for both of the (A) and the compound (B).Type: ApplicationFiled: October 4, 2011Publication date: July 18, 2013Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masaaki Shinohata, Nobuhisa Miyake
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Publication number: 20130178645Abstract: A method for producing a carbonyl compound of the present invention comprises a step (X) of reacting a specific compound having a urea bond with a carbonic acid derivative having a carbonyl group (—C(?O)—) under heating at a temperature equal to or higher than the thermal dissociation temperature of the urea bond to obtain the carbonyl compound.Type: ApplicationFiled: February 21, 2012Publication date: July 11, 2013Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masaaki Shinohata, Nobuhisa Miyake
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Patent number: 8455679Abstract: A prepolymer system has a monomeric isocyanate content of no greater than about 10% by weight based on 100 parts by weight of the prepolymer system. The prepolymer system comprises a diluent component and a prepolymer component different than and separate from the diluent component. The diluent component has an excess of isocyanate (NCO) functional groups, and comprises the reaction product of a monohydric isocyanate-reactive component and an excess of a first isocyanate component. The first isocyanate component comprises monomeric isocyanates reactive with the monohydric isocyanate-reactive component. The prepolymer component also has an excess of NCO functional groups, and comprises the reaction product of a polyol component and an excess of a second isocyanate component. The prepolymer system can be used to prepare foams via reaction with water. The foams have low density and have excellent adhesion and sound dampening properties for use in cavities of automobile bodies.Type: GrantFiled: December 12, 2008Date of Patent: June 4, 2013Assignee: BASF SEInventors: Thomas G. Savino, Nikolay Lebedinski, Rajesh Kumar, Calvin T. Peeler
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Publication number: 20130109881Abstract: A method for producing toluenedicarbamate includes a carbamate production process of producing toluenedicarbamate by reaction between toluenediamine, urea, and/or N-unsubstituted carbamic acid ester, and alcohol; and a benzoyleneurea reduction process of reducing a disubstituted benzoyleneurea and a derivative thereof to 10 mol or less relative to 100 mol of toluenedicarbamate, wherein the disubstituted benzoyleneurea is represented by formula (1) below and has a methyl group and an amino group:Type: ApplicationFiled: May 19, 2011Publication date: May 2, 2013Inventors: Koichi Murayama, Yoshiki Shimokawatoko, Takashi Kanno, Koji Takamatsu, Hiroshi Takeuchi, Masaaki Sasaki, Yasushi Kotaki
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Publication number: 20130079486Abstract: In a method for producing 1,5-pentamethylenediamine, a lysine decarboxylase-expressing microorganism that is subjected to a treatment is used.Type: ApplicationFiled: February 25, 2011Publication date: March 28, 2013Inventors: Tomonori Hidesaki, Akiko Natsuji, Toshihiko Nakagawa, Goro Kuwamura, Daisuke Hasegawa, Satoshi Yamasaki, Kuniaki Sato, Hiroshi Takeuchi
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Publication number: 20130079546Abstract: A method for producing carbamate including a urea production step; a carbamate-forming step: an ammonia separation step of absorbing the gas with water in the presence of carbonate to produce a gas absorption water, and separating ammonia; an aqueous alcohol solution separation step of separating an aqueous alcohol solution from the gas absorption water; an ammonia/carbon dioxide separation step of separating carbon dioxide gas from the aqueous ammonia solution in the gas absorption water from which the aqueous alcohol solution is separated; an aqueous ammonia solution reusing step of mixing the aqueous ammonia solution and carbonate with the water to be used for production of the gas absorption water.Type: ApplicationFiled: May 19, 2011Publication date: March 28, 2013Applicant: MITSUI CHEMICALS, INCInventors: Koji Takamatsu, Satoshi Kato, Takeshi Fukuda, Tetsuya Nakano, Masaaki Sasaki
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Publication number: 20130079542Abstract: A preparation of aryl carbamates can be achieved readily by carbonylation of an aromatic polyamine compound with diphenyl carbonate (DPC) using a combination of an organic acid and a tertiary amine as a catalyst. Aryl carbamate can be converted into 4,4?-diphenylmethane diisocyanate (MDI) by heating it at about 200 to about 230° C. in a non-polar solvent containing inhibitor such as benzoyl chloride. In another application, trans-ureation of biscarbamates with an amine or mixed amines is found to be extremely facile in a polar solvent such as dimethyl sulfoxide (DMSO) and tetramethylene sulfone (TMS) in absence of any catalyst to make polyurea polymers of high molecular weights. Thus, efficient green-chemistry processes based on biscarbamates in making isocyanate products as well as urea prepolymers, urea elastomers and urea plastics have been developed in all in excellent yields without using reactive phosgene or 4,4?-diphenylmethane diisocyanate separately in the trans-ureation polymerizations.Type: ApplicationFiled: September 22, 2011Publication date: March 28, 2013Applicants: National Chung Hsing University, Great Eastern Resins Industrial Co., Ltd.Inventors: Shenghong A. Dai, Xue-Yong Chen, Chao-Hsing Lin, Chun-Ying Huang, Wen-Chen Pan
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Patent number: 8378139Abstract: A process for oligomerizing isocyanates includes a step of continuous conversion of an isocyanate monomer into polyisocyanate containing carbamate and/or allophanate groups, in the presence of a catalyst, wherein the conversion step is carried out in a reactor having a specific heat exchange coefficient of greater than or equal to approximately 200 kW/m3/° C.Type: GrantFiled: April 2, 2009Date of Patent: February 19, 2013Assignees: Centre National de la Recherche Scientifique (C.N.R.S.), Institut National Polytechnique de Toulouse, Perstorp FranceInventors: Hocine Kabir, Johannes Schwarz, Christophe Gourdon, Sébastien Elgue
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Patent number: 8367794Abstract: The invention relates to liquid polyisocyanate mixtures, to a process for their preparation and to their use in single- and two-component polyurethane coating compositions.Type: GrantFiled: September 12, 2008Date of Patent: February 5, 2013Assignee: Bayer MaterialScience AGInventor: Christian Wamprecht
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Patent number: 8362293Abstract: An object of the present invention is to provide a process allowing long-term, stable production of isocyanates at a high yield without the various problems found in the prior art during production of isocyanates without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a decomposition reaction in the presence of a compound having an active proton and a carbonic acid derivative.Type: GrantFiled: January 10, 2008Date of Patent: January 29, 2013Assignee: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Publication number: 20130023691Abstract: The present invention relates to a method of producing a carbamate compound, comprising reacting a fluorine-containing carbonic diester compound represented by formula (1) and a non-aromatic diamine compound represented by formula (2) without using a catalyst, to thereby produce a carbamate compound represented by formula (3), and a method of producing an isocyanate compound represented by formula (20) from the carbamate compound without using a catalyst, wherein R represents a fluorine-containing monovalent aliphatic hydrocarbon group, and A represents a divalent aliphatic hydrocarbon group, a divalent alicyclic hydrocarbon group or a divalent aromatic-aliphatic hydrocarbon group.Type: ApplicationFiled: September 28, 2012Publication date: January 24, 2013Inventors: Takashi Okazoe, Yuko Nagasaki, Hidekazu Okamoto
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Publication number: 20120245377Abstract: A process is proposed for preparing isocyanates by thermally cleaving carbamates to obtain a carbamate cleavage gas comprising the corresponding isocyanate and the corresponding alcohol, which comprises quenching the carbamate cleavage gas in the presence of an ether which functions as an inhibitor for the reverse reaction of the isocyanate with the alcohol.Type: ApplicationFiled: November 30, 2010Publication date: September 27, 2012Applicant: BASF SEInventors: Michael Bock, Eckhard Stroefer, Robert Baumann, Axel Franzke, Joachim Pfeffinger
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Publication number: 20120209024Abstract: A process for coproducing di- and/or polyisocyanates and glycols, comprising process stages A, B, C and E for preparing glycols and process stages A, C, D, E, F and G for preparing di- and/or polyisocyanates, which comprises accomplishing the material coupling via the separation of the reaction mixture obtained in process stage A into process stages B and C, by in process stage A, reacting an aqueous alkylene oxide with carbon dioxide to give a reaction mixture comprising alkylene carbonate, hydrolyzing a portion of the alkylene carbonate-comprising reaction mixture obtained in process stage A to glycol in process stage B, dewatering the remaining alkylene carbonate-comprising stream of the reaction mixture from process stage A in process stage C, in process stage D, synthesizing amine by hydrogenating an aromatic nitro compound or a nitrile, in process stage E, transesterifying the dewatered alkylene carbonate-comprising mixture from process stage C with a monohydroxy alcohol to give the corresponding diType: ApplicationFiled: October 27, 2010Publication date: August 16, 2012Applicant: BASF SEInventors: Michael Bock, Robert Baumann, Axel Franzke, Eckhard Stroefer, Gerhard Theis
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Publication number: 20120203022Abstract: The content of the invention is a process for preparing urethanes by reaction of aromatic amines with a dialkyl carbonate, wherein the alkyl radical of the organic dialkyl carbonate comprises 4-18 carbon atoms and is branched in the 2 position, and the reaction is performed in the presence of a substoichiometric amount of base, based on the amino groups.Type: ApplicationFiled: October 20, 2010Publication date: August 9, 2012Applicant: BASF SEInventors: Axel Franzke, Robert Baumann, Michael Bock
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Patent number: 8193385Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable isocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic amines with urea and alcohols to liberate ammonia and form low molecular weight monomeric urethanes and thermal dissociation of the latter, in which by-products formed are at least partly utilized.Type: GrantFiled: August 8, 2007Date of Patent: June 5, 2012Assignee: BASF SEInventors: Matthias Kloetzer, Heinrich-Josef Blankertz, Gunter Georgi, Eckhard Stroefer, Volker Krase, Gerhard Schulz, Andreas Warzecha
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Patent number: 8158818Abstract: Isocyanate-functional silanes, particularly isocyanate-functional ?-silanes, are prepared in good yield by a liquid phase thermolysis conducted in the presence of a catalyst at a pressure of >100 mbar, or >80 mbar when a thin-film evaporator is used.Type: GrantFiled: November 28, 2007Date of Patent: April 17, 2012Assignee: Wacker Chemie AGInventors: Volker Stanjek, Frank Baumann, Thomas Frey
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Publication number: 20120041223Abstract: The invention is directed to a process for preparing aromatic carbamates which comprises the reaction of an aromatic amine with an organic carbonate in the presence of a catalyst characterized in that Zn4O(OAc)6 is used as catalyst.Type: ApplicationFiled: March 12, 2010Publication date: February 16, 2012Applicant: Bayer Materialscience AGInventors: Stefan Wershofen, Stephan Klein, Anton Vidal-Ferran, Elisenda Reixach, Francese Xavier Rius-Ruiz
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Publication number: 20120010427Abstract: A method for producing urethane compounds includes allowing a primary amine, a urea and/or an N-unsubstituted carbamate, and an alcohol to react in the presence of a compound containing a noncoordinating anion and a metal atom as a catalyst.Type: ApplicationFiled: March 17, 2010Publication date: January 12, 2012Inventors: Tetsuya Hamada, Mitsuaki Chida, Souta Itou, Yoshiki Shimokawatoko, Koichi Murayama, Hiroshi Takeuchi
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HETEROGENEOUSLY CATALYZED CARBAMATE DISSOCIATION FOR SYNTHESIS OF ISOCYANATES OVER SOLID LEWIS ACIDS
Publication number: 20110313192Abstract: Proposed is a process for preparing isocyanates by dissociating the corresponding carbamates, which comprises dissociating the carbamates in the presence of a heterogeneous Lewis-acidic catalyst.Type: ApplicationFiled: June 20, 2011Publication date: December 22, 2011Applicant: BASF SEInventors: Tobias ROSENDAHL, Torsten Mäurer, Eckhard Stroefer, Axel Franzke -
Patent number: 8053595Abstract: An object of the present invention is to provide a process that enables isocyanates to be stably produced over a long period of time at high yield without encountering various problems as found in the prior art when producing isocyanates without using phosgene.Type: GrantFiled: November 16, 2007Date of Patent: November 8, 2011Assignee: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Publication number: 20110207961Abstract: The invention relates to an improved multistage process for the continuous preparation of diisocyanates by reaction of the corresponding diamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric urethanes and thermal dissociation of the latter.Type: ApplicationFiled: August 2, 2010Publication date: August 25, 2011Applicant: BASF SEInventors: Bernhard Geissler, Eckhard Stroefer, Andreas Schmidt, Matthias Kloetzer
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Publication number: 20110178329Abstract: The invention relates to a process for preparing isocyanates by thermal dissociation of carbamates and separation by distillation of the reaction mixture from the carbamate dissociation, comprising the corresponding isocyanate and the corresponding alcohol, by distillation in a column (K) having an enrichment section (V) and a stripping section (A), where the carbamate (1) is introduced between the enrichment section (V) and the stripping section (A) and the isocyanate is taken off as a constituent of the bottom stream (2) and the alcohol is taken off as a constituent of the overhead stream (3) from the column (K), in the presence of an inert solvent, wherein an intermediate boiler having a boiling point between the boiling point of the isocyanate and the boiling point of the alcohol under the operating conditions of the carbamate dissociation is used as inert solvent and is fed as external runback (4) in liquid form in a purity of >95% by weight, based on the total weight of the external runback (4), in tType: ApplicationFiled: January 18, 2011Publication date: July 21, 2011Applicant: BASF SEInventors: Michael BOCK, Axel Franzke, Robert Baumann, Eckhard Stroefer
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Publication number: 20110160476Abstract: The present invention provides a method for producing N-substituted carbamic acid-O-aryl ester derived from a compound having an ureido group, the method comprising the step of carrying out esterification or esterification and transesterification from the compound having the ureido group and a hydroxy composition containing one type or a plurality of types of hydroxy compounds.Type: ApplicationFiled: September 29, 2009Publication date: June 30, 2011Inventors: Nobuhisa Miyake, Masaaki Shinohata, Atsushi Okubo
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Publication number: 20110133121Abstract: The present invention is a method for producing an N-substituted carbamic acid ester derived from an organic amine from an organic amine, a carbonic acid derivative and a hydroxy composition containing one or more types of hydroxy compounds, wherein the organic amine, the carbonic acid derivative and the hydroxy composition are reacted using a urethane production reaction vessel provided with a condenser, a gas containing the hydroxy composition, the compound having the carbonyl group derived from the carbonic acid derivative, and an ammonia formed as a by-product in the reaction, is introduced into the condenser provided in the urethane production reaction vessel, and the hydroxy composition and the compound having the carbonyl group derived from the carbonic acid derivative are condensed, and wherein a stoichiometric ratio of a hydroxy compound contained in the condensed hydroxy composition to the condensed compound having the carbonyl group derived from the carbonic acid derivative is 1 or more, and a ratiType: ApplicationFiled: September 29, 2009Publication date: June 9, 2011Inventors: Masaaki Shinohata, Nobuhisa Miyake
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Publication number: 20110124902Abstract: Carbamate preparation process comprising, the reaction between at least: an amine or polyamines, an organic carbonate of formula (OR)(OR?)C?O, a catalyst which is formed by at least a support selected from at least a metal oxide, a microporous material, a mesoporous material, an anionic laminar compound of hydrotalcite type or their derivatives or an organic polymer and which may further contain a metal from groups 8, 9, 10 and 11 of the periodical system. The carbonates obtained can be transformed in their corresponding isocyanates.Type: ApplicationFiled: December 16, 2008Publication date: May 26, 2011Applicants: Consejo Superior De Investigaciones Cientificas C/Serrano, 117, Universidad Politeecnica de ValenciaInventors: Avelino Corma Canós, Raquel Juarez Marin, Hermenegildo Garcia Gomez
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Publication number: 20110092731Abstract: An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.Type: ApplicationFiled: May 15, 2008Publication date: April 21, 2011Applicant: Asahi Kasei Chemicals CorporationInventors: Masaaki Shinohata, Nobuhisa Miyake
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Publication number: 20110054211Abstract: An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene.Type: ApplicationFiled: May 15, 2008Publication date: March 3, 2011Inventors: Masaaki Shinohata, Nobuhisa Miyake
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Publication number: 20100274047Abstract: An object of the present invention is to provide a process for producing isocyanates, which are industrially useful compounds, without using phosgene, and to provide a process for chemically recycling waste polycarbonate resin. The present invention discloses a process enabling isocyanate compounds to be produced without using phosgene as a raw material by subjecting a carbamic acid ester compound obtained by a reaction between an aromatic polycarbonate resin and an amine compound to a thermal decomposition reaction, while at the same time disclosing a process enabling chemical recycling of aromatic polycarbonate resin by recovering a divalent aromatic hydroxy compound forming aromatic polycarbonates.Type: ApplicationFiled: November 14, 2008Publication date: October 28, 2010Inventors: Masaaki Shinohata, Nobuhisa Miyake