http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-1827379-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_92ce27398651c3df35992ee848c641ad |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B3-06 |
| filingDate | 1990-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1993-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_82b6c127f564bf5798e0c5540209cc26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_427378198d599fdc947731ebe1c9b637 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_67f678ba2ae1453418ed3c59ce62d97f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1de7a1964c7c475f10013bbcbb652a70 |
| publicationDate | 1993-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-1827379-C |
| titleOfInvention | Method of cellulose acetate producing |
| abstract | Usage: to obtain plastic masses (etrols) processed in the product by extrusion or casting, including spectacle frames. SUMMARY OF THE INVENTION: Activated cellulose is acetylated with acetic anhydride in methylene chloride in the presence of a catalyst and hydrolyzed. Methylene chloride is distilled off. The cellulose acetate solution is successively treated with solutions of potassium permanganate and oxalic acid, into which 0.083-0.142 parts by weight are preliminarily added. magnesium sulfate per 100 mAh, the original cellulose. Treatment with a solution of oxalic acid is carried out at 70-85 ° C for 30-60 minutes. The desired product is precipitated and washed. Treatment with said solutions is carried out during or after distillation of methylene chloride. 1 C.p. f-crystals, 1 tab. |
| priorityDate | 1990-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.