Method for preparing fluorination catalyst used to fluorinate
halogenated hydrocarbons
    2.
    发明授权
    Method for preparing fluorination catalyst used to fluorinate halogenated hydrocarbons 失效
    制备用于氟化卤代烃的氟化催化剂的方法

    公开(公告)号:US5849658A

    公开(公告)日:1998-12-15

    申请号:US435166

    申请日:1995-05-05

    摘要: A method for preparing a fluorination catalyst is disclosed, wherein the catalyst contains chromium oxide, has a specific surface area of from 170 m.sup.2 g to 300 m.sup.2 /g, catalyzes the fluorination of a halogenated hydrocarbon with hydrogen fluoride, and has a high activity and long catalyst life. The method includes mixing an aqueous solution of a chromium salt with aqueous ammonia to precipitate chromium hydroxide, drying the precipitated chromium hydroxide, sintering the dried chromium hydroxide, and fluorinating the sintered chromium hydroxide to obtain the chromium oxide catalyst.

    摘要翻译: 公开了一种制备氟化催化剂的方法,其中催化剂含有氧化铬,比表面积为170m 2 / g至300m 2 / g,催化用氟化氢氟化卤代烃,具有较高的活性和长 催化剂寿命。 该方法包括将铬盐水溶液与氨水混合以沉淀氢氧化铬,干燥沉淀的氢氧化铬,烧结干燥的氢氧化铬,氟化烧结的氢氧化铬得到氧化铬催化剂。

    Process for preparing 1,1,1,2-tetrafluoroethane
    3.
    发明授权
    Process for preparing 1,1,1,2-tetrafluoroethane 失效
    制备1,1,1,2-四氟乙烷的方法

    公开(公告)号:US5475166A

    公开(公告)日:1995-12-12

    申请号:US282565

    申请日:1994-07-29

    摘要: In a process for preparing 1,1,1-trifluorochloroethane by reacting, in a gas phase, trichloroethylene and hydrogen fluoride, when the reactant gases are diluted with a gas which is inactive to the reaction, it is very easy to control a reaction temperature, and when a generated gas from the reaction of 1,1,1-trifluorochloroethane and hydrogen fluoride is used as a diluent gas, generation of 1,1-difluoroethylene is suppressed to a very low level while not influencing the reaction between trichloroethylene and hydrogen fluoride.

    摘要翻译: 在通过在气相中使三氯乙烯和氟化氢反应制备1,1,1-三氟氯乙烷的方法中,当反应气体用对反应无活性的气体稀释时,非常容易控制反应温度 ,当使用来自1,1,1-三氟氯乙烷和氟化氢的反应产生的气体作为稀释气体时,1,1-二氟乙烯的产生被抑制到非常低的水平,同时不影响三氯乙烯与氢气之间的反应 氟化物。

    Process for preparing fluorinated compound
    5.
    发明授权
    Process for preparing fluorinated compound 失效
    氟化合物的制备方法

    公开(公告)号:US5326913A

    公开(公告)日:1994-07-05

    申请号:US897261

    申请日:1992-06-11

    CPC分类号: C07C17/278

    摘要: A fluorinated compound of the formula:R--CCl.sub.2 CF.sub.2 CF.sub.3 (I)in which R is a perfluoroalkyl group, a perchloroalkyl group, a polyfluoroalkyl group, a polychloroalkyl group or a polychloropolyfluoroalkyl group, each having at least one carbon atom is prepared at a high selectivity and a high yield by reacting tetrafluoroethylene with a compound of the formula:R--CFCl.sub.2 (II)in which R is the same as defined above in the presence of a Lewis acid.

    摘要翻译: 以高选择性制备具有至少一个碳原子的R为全氟烷基,全氯烷基,多氟烷基,多氯烷基或聚氯多氟烷基的式R-CCl 2 CF 2 CF 3(I)的含氟化合物 并且通过使四氟乙烯与式R-CFCl 2(II)的化合物反应,其中R在路易斯酸存在下与上述相同。

    Process for removal of hydrogen fluoride
    7.
    发明授权
    Process for removal of hydrogen fluoride 失效
    去除氟化氢的方法

    公开(公告)号:US06676809B1

    公开(公告)日:2004-01-13

    申请号:US08967539

    申请日:1997-11-12

    IPC分类号: B01D336

    摘要: Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride, dichloromethane, chlorofluoromethane and/or difluoromethane by distilling the mixture so that two-component azeotropic mixtures of hydrogen fluoride and dichloromethane, hydrogen fluoride and chlorofluoromethane and hydrogen fluoride and difluoromethane are removed, or by liquid-separating the mixture into an upper liquid phase rich in hydrogen fluoride and a lower liquid phase not rich in hydrogen fluoride before each liquid phase is distilled as described above.

    摘要翻译: 通过蒸馏混合物从氟化氢,二氯甲烷,氯氟甲烷和/或二氟甲烷的混合物中有效地除去氟化氢,从而除去氟化氢和二氯甲烷,氟化氢和氯氟甲烷和氟化氢和二氟甲烷的双组分共沸混合物,或通过 如上所述,在每个液相被蒸馏之前,将混合物液体分离成富含氟化氢的上液相和不富含氟化氢的较低液相。

    Process for removal of hydrogen fluoride
    8.
    发明授权
    Process for removal of hydrogen fluoride 失效
    去除氟化氢的方法

    公开(公告)号:US06311515B1

    公开(公告)日:2001-11-06

    申请号:US09593523

    申请日:2000-06-14

    IPC分类号: F25J300

    CPC分类号: C01B7/196 C01B7/195

    摘要: Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride, dichloromethane, chlorofluoromethane and/or difluoromethane by distilling the mixture so that two-component azeotropic mixtures of hydrogen fluoride and dichloromethane, hydrogen fluoride and chlorofluoromethane and hydrogen fluoride and difluoromethane are removed, or by liquid-separating the mixture into an upper liquid phase rich in hydrogen fluoride and a lower liquid phase not rich in hydrogen fluoride before each liquid phase is distilled as described above.

    摘要翻译: 通过蒸馏混合物从氟化氢,二氯甲烷,氯氟甲烷和/或二氟甲烷的混合物中有效地除去氟化氢,从而除去氟化氢和二氯甲烷,氟化氢和氯氟甲烷和氟化氢和二氟甲烷的双组分共沸混合物,或通过 如上所述,在每个液相被蒸馏之前,将混合物液体分离成富含氟化氢的上液相和不富含氟化氢的较低液相。

    Azeotropes of hydrogen fluoride with dichloromethane, difluoromethane
and chlorofluoromethane
    9.
    发明授权
    Azeotropes of hydrogen fluoride with dichloromethane, difluoromethane and chlorofluoromethane 失效
    氟化氢与二氯甲烷,二氟甲烷和氯氟甲烷的共沸物

    公开(公告)号:US5523015A

    公开(公告)日:1996-06-04

    申请号:US162010

    申请日:1993-12-09

    CPC分类号: C01B7/196 C01B7/195

    摘要: Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride, dichloromethane, chlorofluoromethane and/or difluoromethane by distilling the mixture so that two-component azeotropic mixtures of hydrogen fluoride and dichloromethane, hydrogen fluoride and chlorofluoromethane and hydrogen fluoride and difluoromethane are removed, or by liquid-separating the mixture into an upper liquid phase rich in hydrogen fluoride and a lower liquid phase not rich in hydrogen fluoride before each liquid phase is distilled as described above.

    摘要翻译: PCT No.PCT / JP93 / 00455 Sec。 371日期1993年12月9日第 102(e)日期1993年12月9日PCT 1993年4月9日PCT公布。 出版物WO93 / 21140 日期为1993年10月28日。通过蒸馏混合物,氟化氢,二氯甲烷,氯氟甲烷和/或二氟甲烷的混合物中有效地除去了氟化氢,使得氟化氢和二氯甲烷,氟化氢和氯氟甲烷和氟化氢的双组分共沸混合物 如上所述,在每个液相被蒸馏之前,除去二氯甲烷,或将混合物液分离成富含氟化氢的上部液相和不富含氟化氢的较低液相。