公开(公告)号：FI870249A0

公开(公告)日：1987-01-21

申请号：FI870249

申请日：1987-01-21

Applicant: DEGUSSA

Inventor： STOBER REINHARD ,  FISCHER WOLFGANG ,  HUSS MICHAEL

IPC: C08B37/00 ,  C08B37/14 ,  C08B

Abstract: A process for the dry cationization of galactomannans by reaction with alkylidene epoxides in an alkaline medium in the presence of water at 5 DEG to 60 DEG C. and in the presence of finely divided, hydrophilic silicic acid.

公开(公告)号：FI66399C

公开(公告)日：1984-10-10

申请号：FI803318

申请日：1980-10-22

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  POHL GERHARD ,  LANGER MANFRED

IPC: C08B31/12

Abstract: The known process for the production of cationic starch ethers by the reaction of starch with cationic etherifying agents in the presence of water in an alkaline medium is improved by reacting the starch at a temperature of about 50 DEG to 120 DEG C. with an alkylidene epoxide which has a tertiary amino group or quaternary ammonium group in a medium which contains about 10 to 35 weight percent water and about 0.2 to 2.0 weight percent calcium hydroxide or calcium oxide. There are produced in short reaction times yields not previously attainable.

公开(公告)号：FR2499080A1

公开(公告)日：1982-08-06

申请号：FR8200533

申请日：1982-01-14

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  LANGER MANFRED ,  ROSSLER GERT

IPC: C07D303/36 ,  C07D301/32

Abstract: The reaction mixture obtained in the production of 2,3-epoxypropyltrialkylammonium chlorides by treatment of chlorohydroxypropyltrialkylammonium chlorides with alkaline acting materials in aqueous medium containing impurities which create problems in the subsequent use of the 2,3-epoxypropyltrialkylammonium chloride. According to the invention the reaction mixture is freed from these impurities by separating it from undissolved impurities by employing at least about 0.2 mole of 2,3-epoxypropyltrialkylammonium chloride per mole of water.

公开(公告)号：DE2949886A1

公开(公告)日：1981-06-19

申请号：DE2949886

申请日：1979-12-12

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  LANGER MANFRED DR ,  POHL GERHARD DR

IPC: C08B31/12

Abstract: The known process for the production of cationic starch ethers by the reaction of starch with cationic etherifying agents in the presence of water in an alkaline medium is improved by reacting the starch at a temperature of about 50 DEG to 120 DEG C. with an alkylidene epoxide which has a tertiary amino group or quaternary ammonium group in a medium which contains about 10 to 35 weight percent water and about 0.2 to 2.0 weight percent calcium hydroxide or calcium oxide. There are produced in short reaction times yields not previously attainable.

公开(公告)号：DE2542536A1

公开(公告)日：1977-03-31

申请号：DE2542536

申请日：1975-09-24

Applicant: DEGUSSA

Inventor： KNORRE HELMUT DIPL CHEM DR ,  LANGER MANFRED DIPL CHEM DR ,  FISCHER WOLFGANG

IPC: C04B24/06 ,  C04B11/14 ,  C04B13/14

Abstract: Gypsum plaster having a delayed setting time is made by adding a mixture of mesotartaric acid and l-tartaric acid or d,l-tartaric acid or a mixture of l-tartaric acid and d,l-tartaric acid to the gypsum plaster.

公开(公告)号：DE19857448C2

公开(公告)日：2002-02-07

申请号：DE19857448

申请日：1998-12-12

Applicant: DEGUSSA

Inventor： BISCHOFF DIETMAR ,  FISCHER WOLFGANG

IPC: G01N31/22

公开(公告)号：ES2058058T3

公开(公告)日：1994-11-01

申请号：ES86116804

申请日：1986-12-03

Applicant: DEGUSSA

Inventor： STOBER REINHARD DR ,  FISCHER WOLFGANG ,  HUSS MICHAEL

IPC: C08B37/00 ,  C08B37/14

Abstract: A process for the dry cationization of galactomannans by reaction with alkylidene epoxides in an alkaline medium in the presence of water at 5 DEG to 60 DEG C. and in the presence of finely divided, hydrophilic silicic acid.

公开(公告)号：FI91414C

公开(公告)日：1994-06-27

申请号：FI883661

申请日：1988-08-05

Applicant: DEGUSSA

Inventor： STOBER REINHARD ,  FISCHER WOLFGANG ,  HUSS MICHAEL ,  PIETER REIMUND

IPC: C08B31/12 ,  D21H17/28 ,  C08B31/08

公开(公告)号：AU593325B2

公开(公告)日：1990-02-08

申请号：AU6879387

申请日：1987-02-13

Applicant: DEGUSSA

Inventor： STOBER REINHARD DR ,  FISCHER WOLFGANG ,  HUSS MICHAEL ,  UDLUFT KLAUS DR

IPC: C08B31/12 ,  D21H17/28

Abstract: A dry process for preparation of cationic starch ethers by reaction of starch with alkylidene epoxides in the presence of water in an alkaline medium at a temperature of 5 DEG to 40 DEG C. in the presence of a finely divided silica.

公开(公告)号：FI883618A0

公开(公告)日：1988-08-02

申请号：FI883618

申请日：1988-08-02

Applicant: DEGUSSA

Inventor： STOBER REINHARD ,  FISCHER WOLFGANG ,  HUSS MICHAEL ,  PIETER REIMUND

IPC: C08B37/00 ,  C08B37/14 ,  D21H17/24 ,  C08B

Abstract: The process entails reaction with alkylene epoxides in alkaline medium in the presence of water at 5 to 60 DEG C and in the presence of a finely divided hydrophilic silica.