Title:
PROCESS FOR PRODUCING PAPER-MAKING PULPS FROM GRASSES AND PULPS OBTAINED BY THE PROCESS
Document Type and Number:
WIPO Patent Application WO/2009/015556
Kind Code:
A1
Abstract:
Provided is a process for producing pulp from grasses, which comprises cooking
grasses material to give high hardness pulp that has a hardness of K value 16-28
and a beating degree of 10-24°SR, shoving and washing the resulting high
hardness pulp to give the washed pulp, loosening the washed pulp to obtain pulp.
The obtained pulp is subjected to post-treatment to give bleached chemical pulp.
The bleached chemical pulp is made from grasses material and has breaking length
of 4500-8000 m, folding endurance of 20-70 times, tear resistance of 180-280
mN, beating degree of 32-38°SR, and brightness of 65-82% ISO, wherein grasses
material is first cooked to give high hardness pulp with hardness of K value 16-28
in the process of producing the bleached chemical pulp. The bleached chemical
pulp is a kind of bleached grasses chemical pulp with high quality. The process
is an economical and environment friendly process with less cooking liquor consumption
and shorter cooking time.
Inventors:
SONG MINGXIN (CN)
CHEN SONGTAO (CN)
LI HONGFA (CN)
YANG JIHUI (CN)
BI YANJIN (CN)
CHEN SONGTAO (CN)
LI HONGFA (CN)
YANG JIHUI (CN)
BI YANJIN (CN)
Application Number:
PCT/CN2008/001378
Publication Date:
February 05, 2009
Filing Date:
July 25, 2008
Export Citation:
Assignee:
SHANDONG TRALIN PAPER CO LTD (CN)
SONG MINGXIN (CN)
CHEN SONGTAO (CN)
LI HONGFA (CN)
YANG JIHUI (CN)
BI YANJIN (CN)
SONG MINGXIN (CN)
CHEN SONGTAO (CN)
LI HONGFA (CN)
YANG JIHUI (CN)
BI YANJIN (CN)
International Classes:
D21C3/00; D21C9/00; D21H11/12
Foreign References:
CN1131713A | 1996-09-25 | |||
CN87103977A | 1988-04-06 | |||
CN101089291A | 2007-12-19 | |||
CN101082189A | 2007-12-05 | |||
CN101092805A | 2007-12-26 | |||
CN101089292A | 2007-12-19 | |||
CN101082187A | 2007-12-05 | |||
CA1036304A | 1978-08-15 |
Other References:
XUE M.: "Production of cast-coated base paper from wheat straw pulp", HUBEI ZAOZHI, no. 2, 1994, pages 32
Attorney, Agent or Firm:
BEIJING YUANZHONG INTELLECTUAL PROPERTY AGENT LTD. (Prestige TowerNo. 2 Building,A-29, Beisanhuanzhong Road,Xicheng, Beijing 9, CN)
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