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公开(公告)号：ES2044833T3
公开(公告)日：1994-01-16
申请号：ES86116805
申请日：1986-12-03
Applicant: DEGUSSA
Inventor： STOBER REINHARD DR , FISCHER WOLFGANG , HUSS MICHAEL , UDLUFT KLAUS DR
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.
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公开(公告)号：DE3689261D1
公开(公告)日：1993-12-09
申请号：DE3689261
申请日：1986-12-03
Applicant: DEGUSSA
Inventor： STOBER REINHARD DR , FISCHER WOLFGANG , HUSS MICHAEL , UDLUFT KLAUS DR
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.
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公开(公告)号：DE3688740D1
公开(公告)日：1993-08-26
申请号：DE3688740
申请日：1986-12-03
Applicant: DEGUSSA
Inventor： STOBER REINHARD DR , FISCHER WOLFGANG , HUSS MICHAEL
Abstract: In a new process for the dry cationisation of galactomannans by reaction with alkylidene epoxides in alkaline medium in the presence of water, the reaction is carried out at 5-60 deg.C in the presence of a finely divided silicic acid. Powdery mixts. contg. 10-50 wt.% hydrophilic silicic acid and 50-90 wt.% calcium oxide or hydroxide are new and claimed.
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公开(公告)号：FI82840B
公开(公告)日：1991-01-15
申请号：FI870249
申请日：1987-01-21
Applicant: DEGUSSA
Inventor： STOBER REINHARD , FISCHER WOLFGANG , HUSS MICHAEL
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.
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公开(公告)号：DE3726984A1
公开(公告)日：1989-02-23
申请号：DE3726984
申请日：1987-08-13
Applicant: DEGUSSA
Inventor： STOBER REINHARD DR , FISCHER WOLFGANG , HUSS MICHAEL , PIETER REIMUND DR
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.
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Patent Agency Ranking
公开(公告)号：DE3726427A1
公开(公告)日：1989-02-16
申请号：DE3726427
申请日：1987-08-08
Applicant: DEGUSSA
Inventor： STOBER REINHARD DR , FISCHER WOLFGANG , HUSS MICHAEL , PIETER REIMUND DR
Abstract: The process entails reaction with alkylene epoxides in alkaline medium in the presence of water.
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公开(公告)号：FI883661A
公开(公告)日：1989-02-09
申请号：FI883661
申请日：1988-08-05
Applicant: DEGUSSA
Inventor： STOBER REINHARD , FISCHER WOLFGANG , HUSS MICHAEL , PIETER REIMUND
Abstract: The process entails reaction with alkylene epoxides in alkaline medium in the presence of water.
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公开(公告)号：BR8606472A
公开(公告)日：1987-10-20
申请号：BR8606472
申请日：1986-12-29
Applicant: DEGUSSA
Inventor： STOBER REINHARD , FISCHER WOLFGANG , KAUFMANN MICHAEL FUSS
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.
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公开(公告)号：CA1073480A
公开(公告)日：1980-03-11
申请号：CA261451
申请日：1976-09-17
Applicant: DEGUSSA
Inventor： KNORRE HELMUT , LANGER MANFRED , FISCHER WOLFGANG
Abstract: The present invention provides a setting retarder for technical gypsum plasters, comprising an admixture of meso-tartaric acid with at least one component selected from L- and D,Ltartaric acid.
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公开(公告)号：DE19857448A1
公开(公告)日：2000-06-21
申请号：DE19857448
申请日：1998-12-12
Applicant: DEGUSSA
Inventor： BISCHOFF DIETMAR , FISCHER WOLFGANG
IPC: G01N31/22
Abstract: A method for determining the amount of residual alkylating agent in a solid, liquid or solid-liquid reaction medium, i.e. an alkylation reaction mixture or a product obtained the reaction mixture. A method for determining the amount of residual alkylating agent in a solid, liquid or solid-liquid reaction medium, i.e. an alkylation reaction mixture or a product obtained the reaction mixture, comprises: (a) mixing a sample of the reaction medium with a solution of a chromogenic agent (I) selected from p-substituted 4-benzylpyridine derivatives; (b) allowing the color reaction to proceed at 20-150 deg C for 2-300 minutes; and (c) comparing the color with a series of calibration samples containing known amounts of alkylating agent.
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