| 摘要 |
1,202,008. Separation of Ammonium sulphate and methionine. STAMICARBON N.V. 9 April, 1969 [10 April, 1968], No. 18246/69. Heading C2C. [Also in Division Cl] A methionine-containing solution, prepared by hydrolysing methionine nitrile with sulphuric acid and then neutralising the mixture with ammonia to form a solution of ammonium sulphate and methionine, is crystallized at a pH between 0À2 and 6.0 to separate ammonium sulphate having a methionine content of less than 1% by weight. |
