Using a dicarboxylic acid dialkyl ester brightening
First Claim
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1. A process for producing wood pulp, comprising:
- impregnating wood chips with a brightening agent comprising a dicarboxylic acid dialkyl ester, in an amount effective to increase brightness of said wood pulp;
followed by mechanical defiberizing of the wood chips to produce a brightened wood pulp.
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Abstract
A process for producing fibrous materials for the manufacture of cellulose, paper or wood materials by using at least one dicarboxylic acid dialkyl ester and/or a copolymer of polyester-polyether and/or fatty acid polyol monopolyester, dipolyester, tripolyester and or higher polyester. Fibrous materials with an improved quality and higher yield are thus produced.
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Citations
16 Claims
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1. A process for producing wood pulp, comprising:
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impregnating wood chips with a brightening agent comprising a dicarboxylic acid dialkyl ester, in an amount effective to increase brightness of said wood pulp;
followed bymechanical defiberizing of the wood chips to produce a brightened wood pulp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification