Washing and removal method of high molecular substances

Details Washing and removal method of high molecular substances Washing and removal method of high molecular substances

1982-06-18

1984-08-28

Bascomb, Jr., Wilbur L.

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

134 2214, 134 2217, 134 2219, 134 12, 203 72, 203 76, 528484, 422901, B08B 908, B01D 314

Patent

active

044682573

ABSTRACT:
Method of adding water and a hydroxide of an alkali metal or alkaline earth metal to a washing solvent such as an alkylamide and/or alkylsulfoxide when washing and removing high molecular substances stuck on the interior of a production apparatus or molding machine for an aromatic vinyl-acrylonitrile copolymer. A method for regenerating and recovering the washing solvent used for the above-mentioned washing and removal by means of an evaporator and distillation tower.

REFERENCES:
patent: 2678304 (1954-05-01), Buchner et al.
patent: 3476656 (1969-11-01), Van Tassell et al.
patent: 3997360 (1976-12-01), Testa et al.
patent: 3998655 (1976-12-01), Benetta et al.
patent: 4043874 (1977-08-01), Testa et al.

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