107.
(11) Patent number: 2158326
(46) Date of publication: 27.10.2000
(51) Int. Cl.7: D 21 C 3/02, 3/20
(21) Application number: 00105867/12
(22) Application date: 10.03.2000
(71) Applicant:
Institut khimii i khimicheskoj tekhnologii SO RAN
(72) Inventor:
Kozlov I.A.,
Kuznetsov B.N.
(73) Proprietor:
Institut khimii i khimicheskoj tekhnologii SO RAN
(98) Mail address:
660036, g.Krasnojarsk, Akademgorodok, Institut khimii i khimicheskoj tekhnologii SO RAN, patentovedu Zamjatinoj V.V
(54) CELLULOSE PRODUCTION PROCESS
(57)
FIELD: paper-and-pulp industry. SUBSTANCE: cellulose is prepared by cooking wood in soda lye with 0.5- 1.5% 5-nitrobenzotriazole, to which 0.05-0.1% 1,4-dihydro-9,10- dihydroxyanthracene can also be added. EFFECT: increased yield of cellulose and reduced level of residual lignin. 2 cl, 1 tbl, 21 ex
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