发明名称 |
PROCESSO DE PREPARACAO DE NITRILAS AROMATICAS OU ALIFATICAS |
摘要 |
Aromatic/aliphatic nitriles having the formula: Ar-A-CN (I) wherein Ar is phenyl or substituted phenyl and A is a direct chemical bond or a hydrocarbon having from 1 to 6 carbon atoms, are conveniently prepared by heating to a temperature ranging from about 450 DEG C. to about 550 DEG C. a formamide or formanilide having the formula: Ar-A-NHCHO (II) or an amide having the formula: Ar-A-CONH2 (III) in the presence of a fluorinated siliceous catalyst, said catalyst having been prepared by (i) impregnating a particulate silica prepared by the precipitation of sodium silicate with sulfuric acid, with a dilute aqueous solution of hydrofluoric acid, said hydrofluoric acid solution having a concentration in HF of less than about 5% by weight, and the ratio by weight of the hydrofluoric acid contained in said aqueous solution thereof to the silica being less than about 5%, followed by (ii) drying the catalyst thus impregnated. |
申请公布号 |
BR8202762(A) |
申请公布日期 |
1983.04.19 |
申请号 |
BR19828202762 |
申请日期 |
1982.05.13 |
申请人 |
RHONE PUOLENC SPECIALITES CHIMIQUES |
发明人 |
JACQUES ROLAND;REPPELIN MICHEL;SEIGNEURIN LAURENT |
分类号 |
C07B61/00;B01J21/00;B01J27/12;C07C67/00;C07C253/00;C07C255/32;C07C255/33;C07C255/49;C07C255/50;C07C255/54;C07C313/00;C07C323/62;(IPC1-7):C07C121/52;C07C121/66 |
主分类号 |
C07B61/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|