发明名称 |
PROCESS FOR THE PRODUCTION OF 1,4-BUTANEDIOL, GAMMA-BUTYROLACTONE AND TETRAHYDROFURAN |
摘要 |
A process is described for the production of at least one C4 compound selected from butane-1,4-diol, gamma -butyrolactone and tetrahydrofuran, which includes the step of hydrogenation in the vapour phase of a di-(C1 to C4 alkyl) maleate in the presence of a particulate ester hydrogenation catalyst, which process comprises: (a) contacting a vaporous stream containing maleic anhydride vapour, water vapour, and carbon oxides in an absorption zone with a high boiling organic solvent having a boiling point at atmospheric pressure which is at least about 30 DEG C higher than that of the di-(C1 to C4 alkyl) maleate thereby to form a solution of maleic anhydride in the high boiling organic solvent; (b) recovering from the absorption zone a waste gas stream; (c) reacting maleic anhydride in the solution of maleic anhydride of step (a) under esterification conditions in an esterification zone with a C1 to C4 alkanol to form the corresponding di-(C1 to C4 alkyl) maleate; (d) recovering from the esterfication zone a solution of the di-(C1 to C4 alkyl) maleate in the high boiling solvent; (e) contacting the solution of the di-(C1 to C4 alkyl) maleate in the high boiling solvent with a gaseous stream containing hydrogen thereby to strip di-(C1 to C4 alkyl) maleate therefrom and to form a vaporous stream comprising hydrogen and di-(C1 to C4 alkyl) maleate; (f) contacting material of the vaporous stream of step (e) in a hydrogenation zone under ester hydrogenation conditions in the presence of a heterogeneous ester hydrogenation catalyst thereby to convert di-(C1 to C4 alkyl) maleate to at least one C4 compound selected from butane-1,4-diol, gamma -butyrolactone and tetrahydrofuran; and (g) recovering from the hydrogenenation zone a product stream containing said at least one C4 compound. |
申请公布号 |
WO9743242(A1) |
申请公布日期 |
1997.11.20 |
申请号 |
WO1997GB01285 |
申请日期 |
1997.05.12 |
申请人 |
KVAERNER PROCESS TECHNOLOGY LIMITED;TUCK, MICHAEL, WILLIAM, MARSHALL;WOOD, MICHAEL, ANTHONY;HILES, ANDREW, GEORGE |
发明人 |
TUCK, MICHAEL, WILLIAM, MARSHALL;WOOD, MICHAEL, ANTHONY;HILES, ANDREW, GEORGE |
分类号 |
C07B61/00;C07C29/149;C07C29/17;C07C31/20;C07C33/035;C07C67/08;C07C69/60;C07D307/08;C07D307/33;C07D315/00 |
主分类号 |
C07B61/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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