公开(公告)号：CA2103653C

公开(公告)日：1998-08-04

申请号：CA2103653

申请日：1993-08-05

Applicant: DEGUSSA

Inventor： WIELAND STEFAN ,  PANSTER PETER ,  GRETHE HORST

IPC: B01D15/00 ,  B01D53/02 ,  B01D53/86 ,  C02F1/28 ,  C08G77/04 ,  C08G77/48 ,  C08G77/54 ,  C08G77/58 ,  C08L83/07 ,  C08G77/22 ,  B01J20/26 ,  B01J32/00 ,  C08G77/42

Abstract: The invention relates to shaped organosiloxane polycondensates in the form of macroscopic spherical particles with a diameter of 0.01 to 2.5 mm, a specific surface area of 0.01 to 1000 m2/g , a specific pore volume of 0.01 to 5.0 ml/g and a bulk density of 50 to 1000 g/l, consisting of units of the formula X - R1 (I) and/or the formula R2 - Y - R3 (II) and the formula (see fig. I) or (see fig. II) as well as optionally in addition of units of the formula (see fig. III) or (see fig. IV) or (see fig. V) wherein R1 to R3 are identical or different and represent a group of the general formula (see fig. VI) R4being bonded directly to the X or Y group and representing a linear or branched, fully saturated or unsaturated alkylene group, a cycloalkylene group, a phenylene group or a unit of the general formula or and M corresponding to a Si, Ti or Zr atom. Also described are a process for preparation and use.

公开(公告)号：ZA9708764B

公开(公告)日：1998-03-27

申请号：ZA9708764

申请日：1997-09-30

Applicant: SWAN THOMAS & CO LTD ,  DEGUSSA

Inventor： POLIAKOFF MARTYN ,  SWAN THOMAS MACKLYN ,  TACKE THOMAS ,  HITZLER MARTIN GEORG ,  ROSS STEPHEN KEITH ,  WIELAND STEFAN ,  SMAIL FIONA RUTH

IPC: B01J31/06 ,  B01J3/00 ,  C07B37/02 ,  C07B37/04 ,  C07B41/06 ,  C07B61/00 ,  C07C2/66 ,  C07C2/70 ,  C07C2/86 ,  C07C15/02 ,  C07C41/30 ,  C07C43/205 ,  C07C45/46 ,  C07B ,  B01J

CPC classification number: C07C45/46 ,  B01J3/008 ,  C07B37/02 ,  C07B37/04 ,  C07C2/66 ,  C07C2/864 ,  C07C41/30 ,  C07C2521/16 ,  C07C2529/04 ,  C07C2531/02 ,  C07C2531/08 ,  Y02P20/544 ,  C07C15/02 ,  C07C43/205

公开(公告)号：CA2214491A1

公开(公告)日：1998-03-04

申请号：CA2214491

申请日：1997-09-03

Applicant: DEGUSSA

Inventor： WIELAND STEFAN ,  PANSTER PETER

IPC: B01J31/06 ,  C07B61/00 ,  C07C67/08 ,  C07C69/14 ,  C07C69/80 ,  C08G77/398 ,  C08G77/392 ,  C07C69/58

Abstract: The invention provides a process for producing carboxylic acid esters, which includes the steps of: (a) preparing a reaction mixture comprising an alcohol and a carboxylic acid and/or a carboxylic anhydride and/or a carboxylic acid ester and/or a partially esterified carboxylic acid, (b) heating this mixture to a suitable reaction temperature in the presence of a solid polysiloxane insoluble in the reaction medium and having sulphonic acid groups, with intensive thorough mixing accompanied by continuous separation of the reaction water which forms, wherein the polysiloxane is preferably used in a modification post-treated with a soluble aluminium, titanium or zirconium compound, and the spherical particles have a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m2/g, a specific pore volume of 0.01 to 6.0 ml/g, and a bulk density of 50 to 1000 g/l.