公开(公告)号：AU629345B2

公开(公告)日：1992-10-01

申请号：AU5595890

申请日：1990-05-24

Applicant: DEGUSSA

Inventor： FISCHER WOLFGANG ,  BISCHOFF DEITMAR ,  HUSS MICHAEL ,  STOBER REINHARD ,  ROSSLER GERT

IPC: C08B31/12 ,  D21H17/28 ,  D21H17/29 ,  C08B31/10

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：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.