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Title:
BLEACHING PROCESS
Document Type and Number:
WIPO Patent Application WO2002046522
Kind Code:
A3
Abstract:
A process for final bleaching cellulose-containing pulp which has been subjected to previous bleaching with a peroxide compound. The process involves the sequential steps of exposing the pulp to an amount of a reducing agent in order to eliminate residual peroxide compound from the pulp and then final bleaching the pulp by exposing the pulp to an amount of formamidine sulfinic acid.

Inventors:
DENTON RICHARD C
AKERLUND GORGEN
Application Number:
PCT/CA2001/001682
Publication Date:
January 03, 2003
Filing Date:
November 28, 2001
Export Citation:
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Assignee:
WEST FRASER TIMBER CO LTD (CA)
International Classes:
D21C9/10; D21C9/16; (IPC1-7): D21C9/10
Foreign References:
US4675076A1987-06-23
US5298118A1994-03-29
Download PDF:
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