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1. (WO1996009327) AQUEOUS ALCOHOLIC ALKALINE PROCESS FOR CATIONIZATION AND ANIONIZATION OF STARCH
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1996/009327    International Application No.:    PCT/CA1995/000538
Publication Date: 28.03.1996 International Filing Date: 22.09.1995
Chapter 2 Demand Filed:    17.04.1996    
IPC:
C08B 31/12 (2006.01), C08B 31/16 (2006.01)
Applicants: UNIVERSITY OF SASKATCHEWAN [CA/CA]; Dept. of Research Services, Room 210 Kirk Hall, Saskatoon, Saskatchewan S7N 0W0 (CA) (For All Designated States Except US).
SOSULSKI, Frank, W. [CA/CA]; (CA) (For US Only).
BHIRUD, Prakash, R. [CA/CA]; (CA) (For US Only).
KWEON, Meera [CA/CA]; (CA) (For US Only).
TYLER, Robert, T. [CA/CA]; (CA) (For US Only)
Inventors: SOSULSKI, Frank, W.; (CA).
BHIRUD, Prakash, R.; (CA).
KWEON, Meera; (CA).
TYLER, Robert, T.; (CA)
Agent: ADE & COMPANY; 1700-360 Main Street, Winnipeg, Manitoba R3C 3Z3 (CA)
Priority Data:
2,132,685 22.09.1994 CA
Title (EN) AQUEOUS ALCOHOLIC ALKALINE PROCESS FOR CATIONIZATION AND ANIONIZATION OF STARCH
(FR) PROCEDE ALCALIN ET ALCOOLIQUE AQUEUX POUR LA CATIONISATION ET L'ANIONISATION D'AMIDON
Abstract: front page image
(EN)A starch cationization process comprises suspending the starch in an aqueous alcoholic alkaline solvent containing a critical level of water (starch to water ratio 1:3 to 3:1), heating the reaction mixture for a few minutes at 30-90 °C, adding a cationizing reagent such as 3-chloro-2-hydroxypropyl-trimethylammonium chloride, heating for 1-24 hours at 30-80 °C, neutralizing, centrifuging, washing and drying of the cake to yield cationic starches with degrees of substitution of 0.01 to 0.12. Amphoteric starches are produced by simultaneous or sequential reaction of an anionic reagent with or after the cationic reagent in the aqueous alcoholic alkaline solvent. Solvent recovery and concentration of effluent solids is facilitated by distillation.
(FR)Un procédé de cationisation d'amidon consiste à mettre l'amidon en suspension dans un solvant alcalin et alcoolique aqueux contenant un niveau d'eau critique (rapport amidon/eau 1:3 à 3:1), à chauffer le mélange de réaction pendant quelques minutes à 30-90 °C, à ajouter un réactif de cationisation tel que du chlorure de 3-chloro-2-hydroxypropyl-triméthylammonium, et à chauffer pendant 1 à 24 heures à 30-80 °C, et neutraliser, centrifuger, laver et sécher le gâteau pour produire des amidons cationiques à degrés de substitution compris entre 0,001 et 0,12. On produit des amidons amphotères en faisant réagir simultanément ou séquentiellement un réactif anionique avec ou après le réactif cationique dans le solvant alcalin et alcoolique aqueux. La distillation facilite la récupération du solvant et la concentration des effluents solides.
Designated States: CA, DE, GB, US.
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: English (EN)
Filing Language: English (EN)