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Priority claimed from US07/613,602external-prioritypatent/US5204452A/en
Application filed by Du PontfiledCriticalDu Pont
Publication of NO931700LpublicationCriticalpatent/NO931700L/en
Publication of NO931700D0publicationCriticalpatent/NO931700D0/en
Polysaccharides And Polysaccharide Derivatives
(AREA)
Abstract
En fremgangsmåte for fremstilling av nye polymere halogenderivater av chitosan (f.eks. en terpolymer om- fattende 1-35 % 2-deoksy-2-acetamido- glukoseenheter, 1-90 % 2-deoksy-2-aminoglukoseenheter og 8-95 % 2-deoksy- 2-halogenaminoglukoseenheter) omfatt- ende at chitosan eller et chitosansalt omsettes med et halogeneringsmiddel (f.eks. natriumhypokloritt). N-halogen- chitosanene er effektive som flokkuler- ingshj elpemidler.A process for preparing novel polymeric halogen derivatives of chitosan (eg, a terpolymer comprising 1-35% 2-deoxy-2-acetamido glucose units, 1-90% 2-deoxy-2-aminoglucose units and 8-95% 2-deoxy-2-halogenaminoglucose units) comprising reacting chitosan or a chitosan salt with a halogenating agent (e.g., sodium hypochlorite). The N-halogen chitosans are effective as flocculation aids.
NO931700A1990-11-141993-05-10
N-HALOGENE CHITOSANES, PROCEDURE FOR PREPARATION AND USE OF SUCH
NO931700D0
(en)
Process for preparing an industrial aqueous solution of sodium chloride and using the aqueous solution of sodium chloride so obtained for the electrolytic preparation of an aqueous solution of sodium chloride, for the preparation of sodium carbonate and for the production of ...
Process and compositions containing triazine derivatives for protecting maize and sorghum plants against certain herbicides,and some such novel triazine derivatives