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    • 123. 发明授权
    • Selective extraction of diaminotoluene from an ammonolysis product mixture
    • 选择性提取氨基苯甲酸从氨基甲酸酯产品混合物
    • US3686314A
    • 1972-08-22
    • US3686314D
    • 1970-06-25
    • GULF RESEARCH DEVELOPMENT CO
    • BACHA JOHN DSELWITZ CHARLES M
    • C07C85/16
    • C07C209/10
    • Diaminotoluene is selectively separated from an ammonolysis product mixture comprising dichlorotoluene, aminochlorotoluene, diaminotoluene, a cuprous salt catalyst, by-product ammonium salts and excess aqueous ammonia by initially contacting the product mixture with a water immiscible hydrocarbon solvent, such as heptane, to extract all of the dichlorotoluene and aminochlorotoluene and essentially none of the diaminotoluene, and then contacting the residual diaminotoluene-rich aqueous phase with a water-immiscible organic solvent, such as methylene chloride, to extract substantially all of the diaminotoluene.
    • 通过首先使产物混合物与水不混溶的烃溶剂如庚烷接触,将二氨基甲苯与包含二氯甲苯,氨基氯甲苯,二氨基甲苯,亚铜盐催化剂,副产物铵盐和过量氨水的氨解产物混合物选择性分离,以提取所有 的二氯甲苯和氨基氯甲苯,并且基本上没有二氨基甲苯,然后使残余的富含二氨基甲苯的水相与水不混溶的有机溶剂如二氯甲烷接触,以提取基本上所有的二氨基甲苯。