发明名称 |
WERKWIJZE VOOR HET BEREIDEN VAN EEN CELLULOSE-NITRIET-, NITRAAT- EN SULFAATESTER, ALSMEDE VOORWERPEN UIT GEREGENEREERDE CELLULOSE. |
摘要 |
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. |
申请公布号 |
NL169884(B) |
申请公布日期 |
1982.04.01 |
申请号 |
NL19750008261 |
申请日期 |
1975.07.10 |
申请人 |
RICHARD GEORG SCHWEIGER TE VENTURA, CALIFORNIE, VER. ST. V. AM. |
发明人 |
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分类号 |
C08F8/00;C07C203/00;C07C203/04;C08B5/00;C08B5/02;C08B5/14;C08B31/06;C08B37/00;C08F8/14;C08F8/30;C08F8/36;C08F8/42;(IPC1-7):08B5/02;08B5/14;08B16/00 |
主分类号 |
C08F8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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