发明名称 |
PROCESS FOR THE PRODUCTION OF 4,4'-DIAMINO-DICYCLOHEXYLMETHANE WITH A LOW TRANS-TRANS ISOMER CONTENT BY THE CATALYTIC HYDROGENATION OF 4,4'-DIAMINODIPHENYLMETHANE |
摘要 |
The present invention is directed to a process for the catalytic hydrogenation of a starting material containing 4,4 min -diamino-diphenylmethane (4,4 min -MDA) or its mixtures with 2,4 min -diamino-diphenylmethane, 2,2 min -diamino-diphenylmethane and/or higher ring compounds of the diphenylmethane series to a hydrogenation product having a trans-trans isomer content of 4,4 min -diamino-dicyclohexylmethane (4,4 min -HMDA) of about 15 to 40 weight percent, based on the diamine content of the hydrogenated product, by continuously hydrogenating in at least one fixed bed reactor at a temperature of about 100 to 190 DEG C and a pressure of about 50 to 350 bar in the presence of a ruthenium catalyst on a catalyst support having a BET surface area of about 70 to 280 m<2>/g and an average pore diameter dp of about 10 to 320 ANGSTROM , the catalyst being prepared by impregnating the catalyst support to a penetration depth of at least about 50 mu m with a soluble ruthenium compound in an amount sufficient to provide a catalyst containing about 0.1 to 5 weight percent ruthenium and subsequently reducing the soluble ruthenium compound to ruthenium. |
申请公布号 |
EP0324190(B1) |
申请公布日期 |
1993.05.12 |
申请号 |
EP19880121923 |
申请日期 |
1988.12.31 |
申请人 |
HUELS AKTIENGESELLSCHAFT;MOBAY CORPORATION |
发明人 |
SCHMELZER, HANS-GEORG;ALLEN, GARY F.;BUB, GUENTHER, DR.;OTTE, WERNER, DR. |
分类号 |
B01J23/46;B01J35/10;C07B61/00;C07C67/00;C07C209/00;C07C209/72;C07C211/36 |
主分类号 |
B01J23/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|