发明名称 |
Fremgangsmåde til fremstilling af 3-hydroxyalkanaler |
摘要 |
The invention relates to a process for the preparation of 3-hydroxyalkanals having 3 to 12, in particular 3 or 4, C atoms, by hydration of the basic 2-alkenals with water in a homogeneous phase in the presence of an acidic catalyst. …<??>The previously known hydration by means of mineral acids or carboxylic acids as catalyst results in poor space-time yields and/or poor selectivities. These disadvantages can be avoided when a dissolved acid/base buffer is used as catalyst which results in a pH of 2 to 5 in the reaction mixture and whose acid component and the corresponding base are present in the reaction mixture in an amount of 0.5 to 40% by weight in total. The preferred buffers composed of a lower monobasic carboxylic acid and a tertiary amine can be recycled in a simple manner. |
申请公布号 |
DK0544118(T3) |
申请公布日期 |
1995.09.25 |
申请号 |
DK19920118470T |
申请日期 |
1992.10.29 |
申请人 |
DEGUSSA AKTIENGESELLSCHAFT |
发明人 |
ARNTZ, DIETRICH, DR.;HAAS, THOMAS, DR.;BOEHME, GEORG |
分类号 |
B01J31/04;C07B61/00;C07C29/141;C07C31/20;C07C45/64;C07C47/19;(IPC1-7):C07C45/64 |
主分类号 |
B01J31/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|