Class 536/42 - Stabilizing

Subclass of Class 536 - Organic compounds -- part of the class 532-570 series
Definition: Processes for increasing the physical or chemical stability
No. of patents: 4
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
4546175	Process for the manufacture of reels of nitrocellulose thread According to the invention the reels 10 of cellulose thread wound in a loose manner around a hollow perforated core are arranged on the nozzles 9 carried by the hollow arms 8 of a rotor 7a placed on a hollow frame 7 situated at the bottom of a tank 6. A p...	10/08/1985
4401809	Nitrocellulose purification There is disclosed a multi-vessel autoclave which is suitable for use in a continuous process for purifying nitrocellulose made by the nitric acid-sulfuric acid nitration of cellulose. The autoclave comprises a plurality of adjacent cylindrical vessels wh...	08/30/1983
4323669	Process for purification of nitrocellulose A process for purification of nitrocellulose containing residual acid from nitration is provided. In this process the nitrocellulose is cut in the presence of water to form an aqueous slurry of cut nitrocellulose fibers. The pH of the slurry is adjusted t...	04/06/1982

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