Process for removing colored components from solvent for polyacr

Details Process for removing colored components from solvent for polyacr Process for removing colored components from solvent for polyacr

1993-01-27

1994-04-05

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210652, B01D 6100

Patent

active

053002296

ABSTRACT:
A process for removing colored components from a recovered inorganic solvent of polyacrylonitrile, without an appreciable decrease in the concentration of active components, using a reverse osmosis membrane whose NaCl rejection is in the range of 10% to 97%, under a permeation pressure lower than 20 kg/cm.sup.2.

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patent: 4758347 (1988-07-01), Henz et al.
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patent: 4865744 (1989-09-01), Hartling et al.
patent: 4911844 (1990-03-01), Linder et al.
patent: 5201943 (1993-04-01), Monnerat
Patent Abstract of Japan, vol. 3, No. 114 (C-59) Sep. 21, 1979 & JP-A-54 096126 (Kanebo K.K.) Jul. 30, 1979.
Patent Abstract of Japan, vol. 10, No. 4 (C-322) Jan. 9, 1986 & JP-A-60 166 087 (Hitachi Plantkensetsu K.K.) Aug. 29, 1985.
European Search Report dated Jun. 14, 1993.

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