Title:
METHODS FOR ANALYZING BORON-CONTAINING ALKALINE PULPING LIQUORS
Document Type and Number:
WIPO Patent Application WO2001088257
Kind Code:
A8
Abstract:
Chemical species, e.g. metaborate, carbonate, hydroxide and sulfide, in a boron-containing alkaline wood pulping liquor sample are determined quantitatively by (i) subjecting a first aliquot portion of the sample to a primary acid titration analysis to derive multiple equivalence points at different respective pH values; (ii) subjecting a second aliquot portion of the sample to an analysis to determine the quantitative presence of boron or sulfide ions therein; and then (iii) determining the quantitative presence in the sample of at least one of the chemical species. Wood pulping parameters may thus be determined on the basis of the quantitative presence of the chemical species to assist in process and/or quality of the wood pulping process.
Inventors:
HSU WUHWA WESLEY
Application Number:
PCT/US2001/015528
Publication Date:
February 07, 2002
Filing Date:
May 14, 2001
Export Citation:
Assignee:
UNITED STATES BORAX INC (US)
International Classes:
D21C7/12; G01N27/416; G01N31/16; G01N33/34; G01N33/46; (IPC1-7): D21C7/12
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