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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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公开(公告)号：MX161009A
公开(公告)日：1990-06-29
申请号：MX19109182
申请日：1982-01-22
Applicant: UNION CARBIDE CORP
Inventor： CLEVELAND THOMAS COOPER , DEITZLER JAMES EDWARD
IPC: A61K20060101 , B01J23/00 , B01J23/44 , C07C67/36 , C01B20060101 , C07B61/00 , C07C69/36
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：AT18758T
公开(公告)日：1986-04-15
申请号：AT82400118
申请日：1982-01-22
Applicant: UNION CARBIDE CORP
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公开(公告)号：BR8200314A
公开(公告)日：1982-11-23
申请号：BR8200314
申请日：1982-01-21
Applicant: UNION CARBIDE CORP
Inventor： CLEVELAND THOMAS COOPER , DEITZLER JAMES EDWARD , DOUMAUX ARTHUR ROY JR , 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 , C07C69/30
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：GB2188315B
公开(公告)日：1989-12-28
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：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：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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