发明名称 |
Process for the preparation of 3-hydroxyalcanals. |
摘要 |
<p>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.</p> |
申请公布号 |
EP0544118(B1) |
申请公布日期 |
1995.08.09 |
申请号 |
EP19920118470 |
申请日期 |
1992.10.29 |
申请人 |
DEGUSSA AKTIENGESELLSCHAFT |
发明人 |
HAAS, THOMAS, DR.;BOEHME, GEORG;ARNTZ, DIETRICH, DR. |
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 |
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代理人 |
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主权项 |
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地址 |
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