公开(公告)号：JPH1072401A

公开(公告)日：1998-03-17

申请号：JP19215197

申请日：1997-07-17

Applicant: DEGUSSA

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

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

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing 3-hydroxypropionic acid in high yield by using 3-hydroxypropionaldehyde as a 3C constituent. SOLUTION: The objective 3-hydroxypropionic acid or its salt is produced by using 3 hydroxypropionaldehyde as a 3C constituent and at least 10wt.% catalyst expressed in terms of a noble metal based on the 3C constituent when the 3C constituent is catalytically oxidized with oxygen or a gas containing the oxygen in aqueous phase in the presence of the catalyst containing the noble metal of the platinum group, and further the objective 3-hydroxypropionic acid or its salt is isolated from the reaction mixture. Moreover, preferably, the catalyst is used in the amount corresponding to 20-50wt.% based on the 3C constituent and a supported catalyst containing platinum is especially used as the catalyst. The catalytic oxidation is preferably performed without regulating the pH at a temperature within a range of 20-60 deg.C.

公开(公告)号：DE19958182A1

公开(公告)日：2001-08-02

申请号：DE19958182

申请日：1999-12-02

Applicant: DEGUSSA

Inventor： BROSMER CHRISTOPH ,  BISCHOFF DIETMAR

IPC: C08B31/12 ,  C08L3/08 ,  D21H17/28 ,  D21H21/16

Abstract: Process for sizing paper and cardboard comprises using an aqueous size prepared by boiling a starch, cellulose or galactomannan derivative (I) having quaternized 3-amino-2-hydroxypropyl groups. Process for bulk or surface sizing of paper and cardboard comprises: (a) preparing an aqueous size by boiling a starch, cellulose or galactomannan derivative (I) having groups of formula (II) at a degree of substitution (DS) of 0.005-1.0; and (b) either adding the size to a cellulose suspension during the wet part of the papermaking process or applying the size to a paper web. [Image] R1>linear or branched 8-22C hydrocarbyl; R2>, R3>1-4C alkyl; X : an anion of a mineral acid or lower carboxylic acid.