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公开(公告)号：GB2188315A
公开(公告)日：1987-09-30
申请号：GB8629583
申请日：1986-12-10
Applicant: UNION CARBIDE CORP
Abstract: A process is provided for the utilization of dialkyl carbonates formed as by-products in a continuous process for the synthesis of oxalic acid esters from nitrous acid esters and carbon monoxide and wherein the esters are subsequently used as intermediates in the production of commercially useful products, such as ethylene glycol. The process comprises contacting a mixture containing the by-product comprised of a dialkyl carbonate with an aqueous solution of a metal carbonate under hydrolyzing conditions whereby the dialkyl carbonate is converted to the corresponding alkanol and the metal carbonate is converted to metal bicarbonate. Upon distillation of the alkanol from the mixture the bicarbonate is converted back to the metal carbonate which can then be recycled from the bottoms to the hydrolyzing zone for use in further hydrolysis of by-product. The alkanol is recycled for use in the continuous process.
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公开(公告)号：DE3270056D1
公开(公告)日：1986-04-30
申请号：DE3270056
申请日：1982-01-22
Applicant: UNION CARBIDE CORP
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公开(公告)号：DE3264960D1
公开(公告)日：1985-09-05
申请号：DE3264960
申请日：1982-01-22
Applicant: UNION CARBIDE CORP
Inventor： KAPICAK LOUIS ANTHONY , HENRY JOSEPH PETER
Abstract: The invention deals with a process for preparing a diester of oxalic acid from carbon monoxide and an ester of nitrous acid in the vapor phase under a pressure in the presence of a special palladium supported catalyst. The catalyst is a solid palladium supported catalyst comprising metallic palladium or a salt thereof deposited on a nonacidic carrier, such as alpha-alumina, having a surface area of less than about 10 square meters per gram. This process provides an increased conversion to the diester product, a longer catalyst life and less by-product formation.
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公开(公告)号：ZA869304B
公开(公告)日：1987-07-29
申请号：ZA869304
申请日：1986-12-09
Applicant: UNION CARBIDE CORP
IPC: C07C69/36 , C07C29/09 , C07C29/147 , C07C31/04 , C07C67/36 , C07C67/48 , C07C67/60 , C07C69/96 , C01B , C07B , C07C
Abstract: A process is provided for the utilization of dialkyl carbonates formed as by-products in a continuous process for the synthesis of oxalic acid esters from nitrous acid esters and carbon monoxide and wherein the esters are subsequently used as intermediates in the production of commercially useful products, such as ethylene glycol. The process comprises contacting a mixture containing the by-product comprised of a dialkyl carbonate with an aqueous solution of a metal carbonate under hydrolyzing conditions whereby the dialkyl carbonate is converted to the corresponding alkanol and the metal carbonate is converted to metal bicarbonate. Upon distillation of the alkanol from the mixture the bicarbonate is converted back to the metal carbonate which can then be recycled from the bottoms to the hydrolyzing zone for use in further hydrolysis of by-product. The alkanol is recycled for use in the continuous process.
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公开(公告)号：AU546474B2
公开(公告)日：1985-09-05
申请号：AU7975482
申请日：1982-01-22
Applicant: UNION CARBIDE CORP
Inventor： CLEVELAND THOMAS COOPER , DEITZLER JAMES EDWARD , DOUMAUX ARTHUR ROY , HENRY JOSEPH PETER , HURT JOHN MARION , KAPICAK LOUIS ANTHONY , REAM BERNARD CLAUDE
IPC: C07C67/36 , A61K20060101 , B01J23/00 , B01J23/44 , C01B20060101 , C07B61/00 , C07C69/36 , B01J35/10 , C07C67/40
Abstract: A continuous vapor state process for the preparation of diesters of oxalic acid from a nitrogen oxide, an alcohol and carbon monoxide.
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Patent Agency Ranking
公开(公告)号：DE3261961D1
公开(公告)日：1985-02-28
申请号：DE3261961
申请日：1982-08-16
Applicant: UNION CARBIDE CORP
Inventor： ABATJOGLOU ANTHONY GEORGE , KAPICAK LOUIS ANTHONY
Abstract: Process for producing organic tertiary polyphosphine monooxides which comprises reacting an organic tertiary polyphosphine with an organic monofunctional alkylating agent to form an intermediate monophosphonium salt of the polyphosphine starting material and then hydrolyzing the salt so produced to the desired polyphosphine monooxide product.
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公开(公告)号：AU7975482A
公开(公告)日：1982-07-29
申请号：AU7975482
申请日：1982-01-22
Applicant: UNION CARBIDE CORP
Inventor： CLEVELAND THOMAS COOPER , DEITZLER JAMES EDWARD , DOUMAUX ARTHUR ROY , HENRY JOSEPH PETER , HURT JOHN MARION , KAPICAK LOUIS ANTHONY , REAM BERNARD CLAUDE
IPC: C07C67/36 , A61K20060101 , B01J23/00 , B01J23/44 , C01B20060101 , C07B61/00 , C07C69/36 , B01J35/10 , C07C67/40
Abstract: A continuous vapor state process for the preparation of diesters of oxalic acid from a nitrogen oxide, an alcohol and carbon monoxide.
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公开(公告)号：MX162209A
公开(公告)日：1991-04-08
申请号：MX19893983
申请日：1983-09-29
Applicant: UNION CARBIDE CORP
Inventor： REAM BERNARD CLAUDE , HENRY JOSEPH PETER , KAPICAK LOUIS ANTHONY
IPC: B01J23/00 , B01J23/44 , C07B61/00 , C07C67/00 , C07C67/36 , C07C69/36 , C07C201/00 , C07C201/04
Abstract: A process is disclosed for preparing a diester of oxalic acid by contacting carbon monoxide and an ester of nitrous acid in the vapor state under a pressure in the presence of a supported palladium monolith catalyst.
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公开(公告)号：DE3642410A1
公开(公告)日：1987-10-01
申请号：DE3642410
申请日：1986-12-11
Applicant: UNION CARBIDE CORP
Abstract: A process is provided for the utilization of dialkyl carbonates formed as by-products in a continuous process for the synthesis of oxalic acid esters from nitrous acid esters and carbon monoxide and wherein the esters are subsequently used as intermediates in the production of commercially useful products, such as ethylene glycol. The process comprises contacting a mixture containing the by-product comprised of a dialkyl carbonate with an aqueous solution of a metal carbonate under hydrolyzing conditions whereby the dialkyl carbonate is converted to the corresponding alkanol and the metal carbonate is converted to metal bicarbonate. Upon distillation of the alkanol from the mixture the bicarbonate is converted back to the metal carbonate which can then be recycled from the bottoms to the hydrolyzing zone for use in further hydrolysis of by-product. The alkanol is recycled for use in the continuous process.
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公开(公告)号：ZA8609304B
公开(公告)日：1987-07-29
申请号：ZA8609304
申请日：1986-12-09
Applicant: UNION CARBIDE CORP
IPC: C07C69/36 , C07C29/09 , C07C29/147 , C07C31/04 , C07C67/36 , C07C67/48 , C07C67/60 , C07C69/96 , C01B , C07B , C07C
CPC classification number: C07C29/095 , C07C31/04
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