Patent ID: 7357339
Filing Date: 2008-04-15
Classification: C08J

Abstract:
1. A method of wet pulverizing a polysaccharide in particle form having an initial average particle length, comprising ejecting a liquid dispersion of polysaccharide from a pair of nozzles under a pressure of 70 to 250 MPa to form a pair of jets so that the jets collide against each other for thereby pulverizing the polysaccharide, wherein the nozzles are angled such that the jets collide against each other at a point distant from outlets of the nozzles, whereby the polysaceharide is pulverized to an average particle length which is equal to or less than ¼ of the initial while undergoing a reduction in degree of polymerization of less than 10%; wherein the angle of collision between the jets is in a range of 95 to 178 degrees, and wherein the number of pulverizing cycles is from 1 to 200.