Regenerated cellulose film recovery process

Details Regenerated cellulose film recovery process Regenerated cellulose film recovery process

1977-02-22

1978-07-04

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

260 23, 264 37, 264 38, 536 40, 536 60, 536 61, C08B 332, C08B 516, C08B 1600

Patent

active

040989968

ABSTRACT:
Waste raw uncoated and/or coated (such as saran, nitrocellulose and vinyl) regenerated cellulose film is treated to recover its plasticizer and cellulose components for recycling in the manufacture of regenerated cellulose film. The platicizer is first recovered from comminuted waste film particles via extraction with water. The moist comminuted film particles are then converted to viscose, from which coating solids, if any, are removed. The viscose is thereafter employed in the manufacture of regenerated cellulose film.

REFERENCES:
patent: 2184586 (1939-12-01), Donagemma et al.
patent: 2337928 (1943-12-01), Reichel
patent: 2362217 (1944-11-01), Schlosser et al.
patent: 2886563 (1959-05-01), Grohganz
patent: 3758457 (1973-09-01), Broeck et al.
patent: 3884907 (1975-05-01), Laurance et al.

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