我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|Table of Contents|

新疆杨幼龄材制浆特性的研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
1992年04期
Page:
40-47
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
STUDIES ON THE PULPING PROPERTIES OF YOUNG POPULUS BOLLEANA LAUCHE
Article ID:
1000-2006(1992)04-0040-08
Author(s):
Xue Guoxin Yao Guangyu Li Zhungzheng (Nanjing Forestry University)Chen Juhen Li Guohui
Xinjiang Academy of Forestry
Keywords:
Populus bolleana Lauche Young wood Kraft process Optimum process conditions
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1992.04.008
Document Code:
A
Abstract:
In this paper, systematic studies on 1, 2, 3 years old young Populus bolleana Lauche with bark are conducted as regards to their wood structures, fiker characteristies and chemical compositions. Two different pulping processes are employed, and the pulping characteristics are investigated. The specific gravites of these samples with bark are in the range of 0. 34-0. 44 g ?cm-3, their content of bark 18. 55%-21. 88%, their fiber length 0. 64 - 0. 72 mm, fiber width 17. 09-19. 40 urn, length/width ratio 33~42, Runkel ratio>1. They have a high content of holocellulose (78. 07%-78. 63%) , a higher content of extractive, a higher content of ash (1. 89%-2. 24%) and a low content of lignin (20. 07%-20. 18%). They are apparently raw materials for paper making. The optimum process conditions for Kraft of two years old P. bolleana L. with bark are chosen by employing a microcomputer. The optimum regression equations for the kraft process are given in this paper. Results of the test indicate that the optimum sulfidity (all calculated as sodium oxide) is 20%, the total amount of alkali is 1 6. 5% (calculated as sodium oxide) , with the ratio of liquor to chips being 4 : 1 and the cooking time required at maximum temperature (165℃) is 90 minutes. The results of the cooking tests show that the total pulp yield is 50. 61 % and Kappa number 21. 74. The chips with bark require higher alkali (at same maximum temperature and cooking time). It has been found that AP-AQ process can also be suitable to young Populus b. L. with bark for pulping to produce bleached grade chemical pulps.

References

-

Last Update: 1900-01-01