Method for producing a hydrogen-containing chloromethane
    93.
    发明授权
    Method for producing a hydrogen-containing chloromethane 失效
    含氢氯甲烷的制造方法

    公开(公告)号:US5334782A

    公开(公告)日:1994-08-02

    申请号:US960423

    申请日:1992-12-23

    摘要: 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.

    摘要翻译: 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。

    Method of producing carbonic acid diester
    95.
    发明授权
    Method of producing carbonic acid diester 失效
    生产碳酸二酯的方法

    公开(公告)号:US5292916A

    公开(公告)日:1994-03-08

    申请号:US859294

    申请日:1992-05-22

    摘要: A carbonic acid diester is stably and safely produced at a high selectivity and at a high yield by catalytically reacting carbon monoxide with a nitrous acid ester in a gas phase in the presence of a solid catalyst comprising a catalytic solid material carried on a solid carrier and comprising:(a) a platinum group metal and/or a compound thereof,(b) a compound of Fe, Cu, Bi, Co, Ni and/or Sn, and(c) a vanadium compound, molybdenum compound, tungsten compound, sulfuric acid and/or phosphoric acid.

    摘要翻译: PCT No.PCT / JP91 / 01313 Sec。 371日期:1992年5月22日 102(e)日期1992年5月22日PCT 1991年9月30日PCT PCT。 出版物WO92 / 06066 日期:1992年4月16日。在包含催化剂固体的固体催化剂存在下,通过在气相中将一氧化碳与亚硝酸酯催化反应,以高选择性和高产率稳定和安全地生产碳酸二酯 载体在固体载体上的材料,包括:(a)铂族金属和/或其化合物,(b)Fe,Cu,Bi,Co,Ni和/或Sn的化合物,和(c)钒化合物 ,钼化合物,钨化合物,硫酸和/或磷酸。

    Supported platinum alloy electrocatalyst
    97.
    发明授权
    Supported platinum alloy electrocatalyst 失效
    支持铂合金电催化剂

    公开(公告)号:US4970128A

    公开(公告)日:1990-11-13

    申请号:US399125

    申请日:1989-08-28

    摘要: A supported platinum alloy electrocatalyst for an acid electrolyte fuel cell, said electrocatalyst consisting essentially of an electrically conductive powdery carbon carrier and dispersed in, and deposited on, the carrier, an ordered platinum-iron-copper ternary alloy comprising 40 to 60 atomic percent of platinum, 13 to 40 atomic percent of iron and 13 to 40 atomic percent of copper. The electrocatalyst has much better initial activity and lifetime than conventional platinum alone or multi-components alloy electrocatalysts. A process for producing the supported platinum alloy electrocatalyst which comprises depositing copper on a previously formed platinum-iron supported binary ordered alloy, again subjecting the product to an alloying treatment, or depositing iron on the platinum-copper supported binary alloy and then again subjecting the product to an alloying treatment. An electrode for an acid electrolyte fuel cell having an excellent output performance and a long operating life is also provided which comprises the above supported platinum alloy electrocatalyst and a water-repellent binder which are bonded to an electrically conductive and acid-resistant supporting member.