| 摘要 |
1283894 Cyclohexanone oxime STAMICARBON NV 19 April 1971 [11 Feb 1970] 21605/71 Addition to 1283496 Heading C2C The invention comprises an improvement to the recycle process for the production of cyclohexanone oxime disclosed in the parent Specification, characterized in that the recycle liquid, before entering the hydroxylamine synthesis zone, is heated at a temperature of at least 50‹ C., in the presence of nitrous acid so that the total proportion of cyclohexanone and cyclohexanone oxime contaminants is reduced. |
