Analysis and Fate of Lipophilic Extractives in Sulphite Pulps

被引：9

作者：

Sithole, Bruce ^{[1
]}

Shirin, Salma ^{[1
]}

Ambayec, Beth ^{[1
]}

机构：

[1] FPInnovat Paprican, Pointe Claire, PQ, Canada

来源：

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY | 2010年 / 30卷 / 01期

关键词：

analysis; extraction; extractives; lipophilic; pitch; solvents; wood resin; PITCH DEPOSITS; WOOD;

D O I：

10.1080/02773810903370404

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

One of the major requirements of sulphite pulps, particularly those used in the manufacture of dissolving grades, is that their extractives content must not exceed certain levels, as specified by the customer. Since these levels are generally very low, the accuracy and reproducibility of extractives measurements can be poor, which in turn can lead to disagreements between pulp suppliers and their customers. In an effort to improve the reliability of extractives measurements, we have evaluated several methods for the determination of lipophilic extractives in sulphite pulps, using Soxhlet and Soxtec solvent extraction and various modes of drying the extracts including hot plate, infrared lamp, and freeze drying. Analysis of the extracts by size exclusion chromatography showed that a significant portion of the extracts was polymerized during the production process. Lipophilic extractives from ammonium sulphite pulps contain more polymerized matter than the extractives from the magnesium process.

引用

页码：31 / 47

页数：17

共 12 条

[1]

Allen L.H., 2000, Pitch Control, Wood Resin and Deresination, P307

[2]

Back E.L., 2000, PITCH CONTROL WOOD R

[3] Evaluation of methods for extraction and analysis of wood resin in birch kraft pulp [J].