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    • 2. 发明授权
    • Method for producing a hydrogen-containing chloromethane
    • 含氢氯甲烷的制造方法
    • US5334782A
    • 1994-08-02
    • US960423
    • 1992-12-23
    • Shinsuke MorikawaMasaru YoshitakeShin Tatematsu
    • Shinsuke MorikawaMasaru YoshitakeShin Tatematsu
    • B01J23/48B01J23/89C07C17/00C07C17/24C07C19/02C07C19/04
    • C07C17/23B01J23/48B01J23/8926
    • The present invention relates to a method for producing a hydrogen-containing chloromethane such as chloroform at high selectivity in good yield by reducing a polychloromethane such as carbon tetrachloride in the presence of a reduction catalyst.In the present invention, it is important to conduct the reduction reaction in a liquid phase, whereby formation of impurities such as polymers which deactivate the catalyst, can effectively be suppressed, and the high selectivity and high activity of the reduction catalyst can adequately be obtained.As the reduction catalyst, at least one member selected from elements of Groups 8, 9 and 10, such as ruthenium, rhodium, palladium and platinum, may suitably be employed. Also a catalyst comprising, as the main component, such an element and having at least one member of Group 11 elements such as copper, silver and gold added thereto, may also suitably be employed.In a case where the liquid phase reduction reaction is conducted continuously, it is preferred to adopt a fixed bed system, particularly a trickle bed system.The method of the present invention is valuable also as a method for converting carbon tetrachloride which is regulated from the standpoint of global environmental protection, to chloroform which is useful as raw material for various fluorine-containing compounds.
    • PCT No.PCT / JP92 / 00522 Sec。 371日期1992年12月23日 102(e)日期1992年12月23日PCT 1991年4月23日提交PCT公布。 第WO92 / 18447号公报 本发明涉及通过在还原催化剂的存在下还原多氯甲烷如四氯化碳,以高选择性以高产率生产含氢氯甲烷如氯仿的方法。 在本发明中,重要的是在液相中进行还原反应,从而可以有效地抑制催化剂失活的诸如聚合物等杂质的形成,能够充分获得还原催化剂的高选择性和高活性 。 作为还原催化剂,可以适当选择选自元素8,9和10中的至少一种,例如钌,铑,钯和铂。 还可以适当地使用包含作为主要成分的这种元素并且具有添加到其中的至少一种第11族元素​​如铜,银和金的元素的催化剂。 在连续进行液相还原反应的情况下,优选采用固定床系统,特别是滴流床系统。 本发明的方法作为从全球环境保护的角度将四氯化碳转化为可用作各种含氟化合物的原料的氯仿的方法也是有价值的。