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公开(公告)号：CA1336720C
公开(公告)日：1995-08-15
申请号：CA578727
申请日：1988-09-28
Applicant: UNION CARBIDE CORP
Inventor： CRANDALL JOHN WORTH , REAM BERNARD CLAUDE
IPC: C07C27/00 , C07C29/149 , C07C29/80 , C07C31/20 , C07C67/00
Abstract: A process is described for recovering polyester-grade ethylene glycol from crude ethylene glycol containing at least one component which has a normal boiling point below that of ethylene glycol, and which can form a UV absorber in the presence of ethylene glycol which comprises supplying to an ethylene glycol distillation system, preferably comprising a fractional distillation zone having an upper portion, a lower portion and an intermediate portion a crude ethylene glycol stream at a determined pH of less than about 7.5; maintaining within the intermediate portion of the fractional distillation zone a diluent having a boiling point below that of the at least one component, such as methanol, at a concentration sufficient to reduce the formation of UV absorber in the intermediate portion wherein at least ethylene glycol, the at least one component and the diluent, are present, and withdrawing ethylene glycol substantially free of the at least one component from the lower portion of the fractional distillation zone.
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公开(公告)号：DE3861066D1
公开(公告)日：1990-12-20
申请号：DE3861066
申请日：1988-06-17
Applicant: UNION CARBIDE CORP
Inventor： REAM BERNARD CLAUDE
IPC: C07D317/36 , B01D9/02 , C07D317/38
Abstract: Cyclic alkylene carbonates are produced by the homogeneous catalytic reaction of alkylene oxides with carbon dioxide during which process, polyglycols are formed. The catalyst is separated by distillation from the alkylene carbonate and is recycled to the reaction while associated with polyglycols. A purge stream is removed from the recycle to prevent an undue concentration of polyglycols in the reaction and catalyst is separated from the purge stream by acylation of the polyglycols enabling precipitation of the catalyst.
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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：DE3362032D1
公开(公告)日：1986-03-13
申请号：DE3362032
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：BR8305322A
公开(公告)日：1984-05-08
申请号：BR8305322
申请日：1983-09-28
Applicant: UNION CARBIDE CORP
Inventor： REAM BERNARD CLAUDE , HENRY JOSEPH PETER , KAPICAK LOUIS ANTONHY
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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Patent Agency Ranking
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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公开(公告)号：DE3851400T2
公开(公告)日：1995-01-19
申请号：DE3851400
申请日：1988-09-28
Applicant: UNION CARBIDE CORP
Inventor： CRANDALL JOHN WORTH , REAM BERNARD CLAUDE
IPC: C07C27/00 , C07C29/149 , C07C29/80 , C07C31/20 , C07C67/00
Abstract: A process is described for recovering polyester-grade ethylene glycol from crude ethylene glycol containing at least one component which has a normal boiling point below that of ethylene glycol, and which can form a UV absorber in the presence of ethylene glycol which comprises supplying to an ethylene glycol distillation system, preferably comprising a fractional distillation zone having an upper portion, a lower portion and an intermediate portion a crude ethylene glycol stream at a determined pH of less than about 7.5; maintaining within the intermediate portion of the fractional distillation zone a diluent having a boiling point below that of the at least one component, such as methanol, at a concentration sufficient to reduce the formation of UV absorber in the intermediate portion wherein at least ethylene glycol, the at least one component and the diluent, are present, and withdrawing ethylene glycol substantially free of the at least one component from the lower portion of the fractional distillation zone.
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公开(公告)号：MX161425A
公开(公告)日：1990-09-24
申请号：MX20537685
申请日：1985-05-23
Applicant: UNION CARBIDE CORP
Inventor： REAM BERNARD CLAUDE , TELLIS CYRIL
IPC: B01D53/40 , B01D53/00 , B01D53/14 , B01D53/34 , B01D53/52 , B01D53/77 , C10K1/34 , C10L3/10 , C01B17/16
Abstract: A process for the removal of acid gases primarily other than carbon dioxide from a gas mixture which includes carbon dioxide.
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公开(公告)号：DE3572772D1
公开(公告)日：1989-10-12
申请号：DE3572772
申请日：1985-05-23
Applicant: UNION CARBIDE CORP
Inventor： REAM BERNARD CLAUDE , TELLIS CYRIL
Abstract: A process for the removal of acid gases primarily other than carbon dioxide from a gas mixture which includes carbon dioxide.
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公开(公告)号：ZA8807281B
公开(公告)日：1989-06-28
申请号：ZA8807281
申请日：1988-09-28
Applicant: UNION CARBIDE CORP
Inventor： CRANDALL JOHN WORTH , JOHN WORTH CRANDALL , REAM BERNARD CLAUDE , BERNARD CLAUDE REAM
CPC classification number: C07C29/80 , Y10S203/06 , Y10S203/20 , Y10S203/24 , C07C31/202
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