发明授权
- 专利标题: Manufacture of butanedicarboxylic acid esters
- 专利标题(中): 丁二羧酸酯的制造
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申请号: US883216申请日: 1978-03-03
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公开(公告)号: US4171451A公开(公告)日: 1979-10-16
- 发明人: Rudolf Kummer , Heinz-Walter Schneider , Rolf Platz , Peter Magnussen , Franz-Josef Weiss
- 申请人: Rudolf Kummer , Heinz-Walter Schneider , Rolf Platz , Peter Magnussen , Franz-Josef Weiss
- 申请人地址: DEX
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX
- 优先权: DEX2713195 19770325
- 主分类号: C07C69/44
- IPC分类号: C07C69/44 ; B01J31/00 ; C07B61/00 ; C07C67/38 ; C07C69/34
摘要:
A process for the manufacture of butanedicarboxylic acid esters, wherein(a) an aqueous cobalt salt solution is treated, at from 50.degree. to 200.degree. C. and under a pressure of from 50 to 500 bars, with excess carbon monoxide and hydrogen in the presence of active charcoal laden with cobalt carbonyl,(b) the resulting aqueous solution of cobalt carbonyl hydride is extracted with butadiene or with a hydrocarbon mixture containing butadiene and the aqueous phase is separated off,(c) the butadiene, or butadiene-hydrocarbon mixture, containing cobalt carbonyl hydride, cobalt carbonyl and butenyl-cobalt tricarbonyl is reacted with carbon monoxide and an excess of an alkanol of 1 to 4 carbon atoms in the presence of from 0.5 to 2 moles, per mole of butadiene, of a tertiary nitrogen base having a pK.sub.a of from 3 to 11, at from 80.degree. to 150.degree. C. under a pressure of from 300 to 2,000 bars, and(d) the resulting reaction mixture is freed from the tertiary nitrogen base contained therein, except for from 0.1 to 0.3 mole per mole of pentenoic acid ester, and from excess hydrocarbons, the pentenoic acid ester remaining in the reaction mixture is reacted with carbon monoxide and an excess of an alkanol of 1 to 4 carbon atoms at from 140.degree. to 200.degree. C. and under pressures of from 100 to 400 bars in the presence of the amounts of cobalt carbonyl and tertiary nitrogen base contained in the reaction mixture, and excess alkanol and free nitrogen base are then distilled off, and(e) the reaction mixture which remains, and which contains cobalt catalyst, the butanedicarboxylic acid ester and by-products is treated with an oxidizing agent in an aqueous acid medium and the mixture is separated into an organic phase, from which the butanedicarboxylic acid ester is isolated by distillation, and into an aqueous phase containing cobalt salts.Butanedicarboxylic acid esters may be used for the manufacture of adipic acid and of nylons.
公开/授权文献
- US5980453A Endoscope with low distortion 公开/授权日:1999-11-09
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