| 摘要 |
Ammonium bisulphate is obtained simultaneously with methacrylamide by treating one mole of a fully reacted mixture of equivalent quantities of acetone cyanhydrin and sulphuric acid with from 1 to 1.1 moles of ammonia and separating the methacrylamide and ammonium bisulphate phases. The phase separation and/or treatment with ammonia may take place at 100 DEG to 180 DEG C. The treatment may be carried out continuously under elevated pressure and in the presence of 0.1 to 0.5 equivalents of water. The ammonia may be in either the gaseous or liquid state. Specification 943,536 and U.S.A. Specification 2,431,468 are referred to.ALSO:Methacrylamine is obtained simultaneously with ammonium bisulphate by treating one mole of a fully reacted mixture of equivalent quantities of acetone cyanhydrin and sulphuric acid with from 1 to 1.1 moles of ammonia and separating the methacrylamide and ammonium bisulphate phases. The phase separation and/or treatment with ammonia may take place at 100 DEG to 180 DEG C. The treatment may be carried out continuously under elevated pressure and in the presence of 0.1 to 0.5 equivalents of water. Specification 943,536 and U.S.A. Specification 2,431,468 are referred to. |
