publication . Article . 2011

THE REACTIVITY OF PREHYDROLYZED SOFTWOOD KRAFT PULPS AFTER PROLONGED COOKING FOLLOWED BY CHLORITE DELIGNIFICATION

Ulf Germgard; Muhammad Asif Javed;
Open Access English
  • Published: 01 May 2011 Journal: BioResources (issn: 1930-2126, Copyright policy)
  • Publisher: North Carolina State University
Abstract
In a laboratory study high-quality spruce chips were prehydrolyzed to remove hemicelluloses and then kraft cooked to different kappa numbers by varying the cooking time. Each pulp sample was then chlorite delignified to selectively remove the remaining lignin. The reactivities of the pulp samples before and after chlorite delignification were determined by Fock’s test, which is supposed to measure the pulp’s reactivity in the conventional viscose process. A number of analyses were carried out to determine which parameters affected pulp reactivity, as, for example: intrinsic viscosity, kappa number, pulp yield, carbohydrate composition, levelling-off degree of po...
Subjects
Medical Subject Headings: stomatognathic systemstomatognathic diseases
free text keywords: Alkali solubility, Carbohydrate composition, Chlorite delignification, Levelling-off degree of polymerization, Pulp reactivity, R18, S18, Biotechnology, TP248.13-248.65
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Article . 2011
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