公开(公告)号：ES2075572T3

公开(公告)日：1995-10-01

申请号：ES92118470

申请日：1992-10-29

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BOHME GEORG ,  ARNTZ DIETRICH DR

IPC: B01J31/04 ,  C07B61/00 ,  C07C29/141 ,  C07C31/20 ,  C07C45/64 ,  C07C47/19

Abstract: 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.

公开(公告)号：ES2023682B3

公开(公告)日：1992-02-01

申请号：ES88106179

申请日：1988-04-19

Applicant: DEGUSSA

Inventor： BOHME GEORG ,  HOFEN WILLI ,  PRESCHER GUNTER ,  SIEGMEIER RAINER

IPC: C07C67/00 ,  C07C407/00 ,  C07C409/26