Class 536/40 - Recovery from photographic film

Subclass of Class 536 - Organic compounds -- part of the class 532-570 series
Definition: Processes in which nitrated cellulose is recovered from
No. of patents: 3
Last issue date: 08/11/1998

Number	Title	Issue Date
5792856	Process for preparing carboxyalkyl cellulose esters This invention provides certain carboxymethyl cellulose (CMC) esters of higher acids (e.g., CMC acetate propionate, CMC propionate, CMC acetate butyrate, and CMC butyrate). These new ether derivatives of cellulose esters exhibit solubility in a wide range...	08/11/1998
4814439	Chemical process for the denitration of nitrocellulose An improved chemical process is provided for the disposal of scrap nitroculose. The process involves the use of organic sulfhydryl-containing compounds to effect the nitrogen release from the nitrocellulose polymer. The nitrogen released by the applicati...	03/21/1989
4098996	Regenerated cellulose film recovery process 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 re...	07/04/1978

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