PROCESS FOR THE MANUFACTURE OF A DRESSING AND DRESSING OBTAINED
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United States of America Patent
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Issued Date -
Oct 23, 2014
app pub date -
Jan 11, 2012
filing date -
Jan 11, 2011
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Abandoned
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Abstract
A process for producing a salt of a chitosan acid anion derivative, which comprises contacting chitosan fibre (a) with a base in an aqueous or non-aqueous medium and (b) with a solution in an aqueous or non-aqueous medium of a salt of the formula (I): M-R-T wherein M is a Group IA metal cation; R is a hydrocarbyl oxoacid anion, substituted by T; and T is a nucleophilic leaving group, all at a temperature below 50° C., preferably in the range of 30 to 40° C.
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