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US 2006/0137838 A1Published application
Method for making carboxyalkyl cellulose
AssigneeWeyerhaeuser NR Company
InventorsMengkui Luo, Amar Neogi, Andrew Dodd, S. Weerawarna
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Abstract
Methods for making the carboxyalkyl cellulose.
Claims20
A method for making a carboxyalkyl cellulose, comprising treating a pulp having a kappa value of from about 1 to about 65 with a carboxyalkylating agent to provide a carboxyalkyl cellulose.
A method for making carboxyalkyl cellulose, comprising:
- (a) alkalizing a pulp having a kappa value of from about 1 to about 65 to provide an alkalized pulp;
- and
- (b) etherifying the alkalized pulp with a carboxyalkylating agent to provide a carboxyalkyl cellulose.
A method for making carboxyalkyl cellulose, comprising:
- (a) crosslinking a pulp having a kappa value of from about 1 to about 65 to provide a crosslinked pulp;
- (b) alkalizing the crosslinked pulp to provide an alkalized pulp;
- and
- (c) etherifying the alkalized pulp with a carboxyalkylating agent to provide a carboxyalkyl cellulose.
1 more element
Dependencies are inferred from the claim text.