| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_45ed5a96cc204c0b1e587286751ddc25 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B37-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B31-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B5-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B5-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B5-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C203-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B5-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B37-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B31-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C203-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-14 |
| filingDate |
1975-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1982-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1982-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
NL-169884-C |
| titleOfInvention |
METHOD FOR PREPARING A CELLULOSE NITRITE, NITRATE AND SULPHATE ESTER, AND ARTICLES FROM REENERGATED CELLULOSE. |
| abstract |
1521125 Cellulose nitrites, sulphates and nitrates R G SCHWEIGER 8 July 1975 [10 July 1974] 28676/75 Heading C3A Nitrite esters of cellulose which may be converted to sulphates or nitrates are prepared by reacting water-containing, cellulose having not more than 12% water content with dinitrogen tetroxide or nitrosyl chloride at less than 50‹ C. with stirring in the presence of at least three parts by weight of a swelling or solubilizing solvent for the nitrite ester per part by weight of cellulose in the presence of proton acceptor. The cellulose preferably contains 4-12% water by treatment with a highly polar aprotic solvent. The solvent used is N,N-dimethylformamide and the highly polar aprotic solvent may be N,N-dimethylformamide, N,N-dimethylacetamide or pyridine. The sulphate ester may be prepared by reacting the nitrile ester with SO3 or a complex thereof and neutralizing with a base to give the alkali salt form. |
| priorityDate |
1974-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |