75.
(11) Patent number: 2155191
(46) Date of publication: 27.08.2000
(51) Int. Cl.7: C 08 B 11/12, 15/04
(21) Application number: 99115200/04
(22) Application date: 14.07.1999
(71) Applicant:
Institut khimii tverdogo tela i mekhanokhimii SO RAN
(72) Inventor:
Lomovskij O.I.,
Fadeev E.I.
(73) Proprietor:
Institut khimii tverdogo tela i mekhanokhimii SO RAN
(98) Mail address:
630128, g.Novosibirsk, ul. Kutateladze 18, IKhTTM SO RAN, Ushakovoj E.P
(54) PROCESS FOR PRODUCTION OF CARBOXYMETHYLCELLULOSE
(57)
FIELD: paper-and- pulp industry. SUBSTANCE: process is carried out in two stages on flow vibrational centrifugal mill using acceleration of grinding bodies 100-200 m/s2 for 1 to 2 min. First, original cellulose-containing raw material is treated with monocloroacetic acid salt and then, aqueous sodium hydroxide solution is added to preliminarily formed composite to ensure molar ratio cellulose/salt/alkali/water equal to 1:1.7:1.6:(0.85- 0.90). Process is terminated by ripening conducted at heating. EFFECT: simplified technology and carboxymethylcellulose is obtained in the form of free-flowing easy-to-dissolve powder. 6 ex
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