公开(公告)号：JPH1067701A

公开(公告)日：1998-03-10

申请号：JP19215297

申请日：1997-07-17

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  MEIER MARTIN DR ,  BROSMER CHRISTOPH DR ,  ARNTZ DIETRICH DR ,  FREUND ANDREAS DR

IPC: C07C51/235 ,  C07C55/08

Abstract: PROBLEM TO BE SOLVED: To obtain the subject compound in a high yield useful as a synthetic material by a catalytic oxidation of a C3 component. SOLUTION: This objective malonic acid or its salt can be obtained by carrying out the catalytic oxidation of the C3 component in water phase by oxygen or oxygen containing gas in the presence of a catalyst containing a noble metal selected from platinum group (e.g. Ru, Rh, Pd, Os, Ir, Pt), at pH >=6, at the temperature range of 20-60 deg.C. Easily purchasable 3-hydroxypropionaldehyde or 3-hydroxypropionic acid or their aqueous solution is used as the C3 component. The catalysts containing Palladium or Platinum is preferred as the reaction catalyst, the amount of the catalyst to the C3 component is preferably 20-50wt.%.

公开(公告)号：DE19629372A1

公开(公告)日：1998-01-22

申请号：DE19629372

申请日：1996-07-20

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  MEIER MARTIN DR ,  BROSMER CHRISTOPH DR ,  ARNTZ DIETRICH DR ,  FREUND ANDREAS DR

IPC: C07C51/235 ,  C07C55/08 ,  C07C51/21

Abstract: In the preparation of malonic acid (I) or its salts by catalytic oxidation of a starting material (II) with 3 carbon (C) atoms with (gas) containing oxygen (O2) in the presence of a platinum-group noble metal catalyst in aqueous phase at pH \- 6 and isolation of (I) or its salts, (II) is 3-hydroxypropionaldehyde (IIA) or 3-hydroxypropionic acid (IIB) and the amount of catalyst used corresponds to

公开(公告)号：DE19629371A1

公开(公告)日：1998-01-22

申请号：DE19629371

申请日：1996-07-20

Applicant: DEGUSSA

Inventor： HAAS THOMAS DR ,  BROSMER CHRISTOPH DR ,  MEIER MARTIN DR ,  ARNTZ DIETRICH DR ,  FREUND ANDREAS DR

IPC: B01J23/40 ,  B01J23/42 ,  B01J23/44 ,  C07B61/00 ,  C07C51/235 ,  C07C59/01

Abstract: The preparation of 3-hydroxypropionic acid (I) or its salts comprises by catalytic oxidation of 3-hydroxypropionaldehyde (II) with oxygen or oxygen-containing gas in the presence of a platinum-group noble metal M as catalyst in aqueous phase and isolation of (I) or its salts. The amount of M is 10 wt.% with respect to (II).