公开(公告)号：FI103798B1

公开(公告)日：1999-09-30

申请号：FI902525

申请日：1990-05-22

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  BISCHOFF DIETMAR ,  HUSS MICHAEL ,  STOBER REINHARD ,  ROESSLER GERT

IPC: C08B31/12 ,  D21H17/28 ,  D21H17/29

Abstract: Process for the preparation of a cationic starch having a controlled viscosity, in which, in one process step, the starch is homogenised in the presence of 10 to 35 % by weight of water and preferably 0.01 to 2.00 % by weight of a finely divided silica and/or silicate (based in each case on the total amount of the mixture) with an alkaline oxide, hydroxide, silicate or aluminate or a mixture thereof, an alkylene epoxide and a peroxy compound or a mixture of at least two peroxy compounds, and is then boiled down at the desired time.

公开(公告)号：ES2052510T3

公开(公告)日：1994-07-16

申请号：ES87106169

申请日：1987-04-28

Applicant: DEGUSSA

Inventor： STOBER REINHARD DR ,  KOHN ELLEN ,  BISCHOFF DIETMAR

IPC: C08F8/30 ,  C08F8/00 ,  C08F8/32 ,  C08F8/44 ,  D21H17/36

公开(公告)号：FI902525A0

公开(公告)日：1990-05-22

申请号：FI902525

申请日：1990-05-22

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  BISCHOFF DIETMAR ,  HUSS MICHAEL ,  STOBER REINHARD ,  ROESSLER GERT

IPC: C08B31/12 ,  D21H17/28 ,  D21H17/29 ,  C08B

Abstract: Process for the preparation of a cationic starch having a controlled viscosity, in which, in one process step, the starch is homogenised in the presence of 10 to 35 % by weight of water and preferably 0.01 to 2.00 % by weight of a finely divided silica and/or silicate (based in each case on the total amount of the mixture) with an alkaline oxide, hydroxide, silicate or aluminate or a mixture thereof, an alkylene epoxide and a peroxy compound or a mixture of at least two peroxy compounds, and is then boiled down at the desired time.

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：DE3733507A1

公开(公告)日：1989-04-13

申请号：DE3733507

申请日：1987-10-03

Applicant: DEGUSSA

Inventor： STOBER REINHARD DR ,  BISCHOFF DIETMAR ,  HUSS MICHAEL

IPC: C08B11/145

Abstract: The ethers are prepared by reacting alkylene epoxides with cellulose or derivatives thereof in alkaline medium in the presence of water. Cationisation agents employed are alkylene epoxides or mixtures thereof with the general formulae in which n is 1, 2 or 3, R , R and R are identical or different alkyl radicals with 1 to 18 carbon atoms or R is the benzyl radical or -C2H4OH, and X is chloride, bromide, sulphate or acetate.

公开(公告)号：FI103798B

公开(公告)日：1999-09-30

申请号：FI902525

申请日：1990-05-22

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  BISCHOFF DIETMAR ,  HUSS MICHAEL ,  STOBER REINHARD ,  ROESSLER GERT

IPC: C08B31/12 ,  D21H17/28 ,  D21H17/29

公开(公告)号：FI884450A0

公开(公告)日：1988-09-28

申请号：FI884450

申请日：1988-09-28

Applicant: DEGUSSA

Inventor： STOBER REINHARD ,  BISCHOFF DIETMAR ,  HUSS MICHAEL

IPC: C08B11/145 ,  C08B

Abstract: The ethers are prepared by reacting alkylene epoxides with cellulose or derivatives thereof in alkaline medium in the presence of water. Cationisation agents employed are alkylene epoxides or mixtures thereof with the general formulae in which n is 1, 2 or 3, R , R and R are identical or different alkyl radicals with 1 to 18 carbon atoms or R is the benzyl radical or -C2H4OH, and X is chloride, bromide, sulphate or acetate.

公开(公告)号：DE10146069A1

公开(公告)日：2003-04-03

申请号：DE10146069

申请日：2001-09-19

Applicant: DEGUSSA

Inventor： LEININGER STEFAN ,  HAAS THOMAS ,  BISCHOFF DIETMAR ,  VANHEERTUM RUDOLF ,  ECKER ARMIN

IPC: C08B31/18

Abstract: A process for the oxidation of starch to obtain carbonyl-substituted starch using V, Cr, Mn, Fe, Co or Cu, wherein Fe and/or Cu are preferred as catalyst. The oxidation of the starch proceeds in quasi-dry form by spraying the dry starch with solutions containing hydrogen peroxide and/or the catalyst and mixing the moistened powder. Oxidized starch containing up to approx. 10 carbonyl groups per 100 glucose units is obtainable.

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.

公开(公告)号：DE59010731D1

公开(公告)日：1997-08-14

申请号：DE59010731

申请日：1990-05-08

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  BISCHOFF DIETMAR ,  HUSS MICHAEL ,  STOBER REINHARD DR ,  ROESSLER GERT DR

IPC: C08B31/12 ,  D21H17/28 ,  D21H17/29

Abstract: Process for the preparation of a cationic starch having a controlled viscosity, in which, in one process step, the starch is homogenised in the presence of 10 to 35 % by weight of water and preferably 0.01 to 2.00 % by weight of a finely divided silica and/or silicate (based in each case on the total amount of the mixture) with an alkaline oxide, hydroxide, silicate or aluminate or a mixture thereof, an alkylene epoxide and a peroxy compound or a mixture of at least two peroxy compounds, and is then boiled down at the desired time.