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    Process for the manufacture of halocarbons and selected compounds and azeotropes with HF
    1.
    发明授权
    Process for the manufacture of halocarbons and selected compounds and azeotropes with HF 失效
    用于制造卤代烃和所选化合物以及与HF共沸的方法

    公开(公告)号：US06291730B1

    公开(公告)日：2001-09-18

    申请号：US09011401

    申请日：1998-01-28

    Applicant: Ralph Thomas Baker ,  Viacheslav Alexandrovich Petrov ,  Velliyur Nott Mallikarjuna Rao ,  Allen Capron Sievert

    Inventor： Ralph Thomas Baker ,  Viacheslav Alexandrovich Petrov ,  Velliyur Nott Mallikarjuna Rao ,  Allen Capron Sievert

    IPC: C07C1710

    CPC classification number: C07C19/10 ,  C07C17/206 ,  C07C17/275 ,  C07C17/278 ,  C07C17/38 ,  C07C17/386 ,  C07C19/08 ,  Y02P20/582 ,  C07C19/01 ,  C07C19/16

    Abstract: A liquid phase process is disclosed for producing halogenated alkane adducts of the formula: CAR1R2CBR3R4 (where A, B, R1, R2, R3, and R4 are as defined in the specification) which involves contacting a corresponding halogenated alkane, AB, with a corresponding olefin, CR1R2═C3R4 in a dinitrile or cyclic carbonate ester solvent which divides the reaction mixture into two liquid phases and in the presence of a catalyst system containing: (i) at least one catalyst selected from monovalent and divalent copper; and optionally (ii) a promoter selected from aromatic or aliphatic heterocyclic compounds which contain at least one carbon-nitrogen double bond in the heterocyclic ring. When hydrochlorofluorocarbons are formed, the chlorine content may be reduced by reacting the hydrochlorofluorocarbons with HF. New compounds disclosed include CF3CF2CCl2CH2CCl3, CF3CCl2CH2CH2Cl and CF3CCl2CH2CHClF. These compounds are useful as intermediates for producing hydrofluorocarbons. Azeotropes of CClF2CH2CF3 with HF and azeotropes of CF3CH2CHF2 with HF are also disclosed; as are processes for producing such azeotropes. A process for purification of certain hydrofluorocarbons and/or chloroprecursors thereof from mixtures of such compounds with HF is also disclosed.

    Abstract translation: 公开了制备下式的卤化烷烃加成物的液相方法：CAR1R2CBR3R4（其中A，B，R1，R2，R3和R4如说明书中所定义），其涉及使相应的卤代烷烃AB与相应的 烯烃，CR1R2 = C3R4在二腈或环状碳酸酯溶剂中，其将反应混合物分成两个液相，并且在催化剂体系存在下，包含：（i）至少一种选自单价和二价铜的催化剂; 和任选地（ii）选自在杂环中含有至少一个碳 - 氮双键的芳族或脂族杂环化合物的促进剂。 当形成氢氯氟烃时，可以通过氢氯氟烃与HF反应来降低氯含量。 所公开的新化合物包括CF 3 CF 2 CCl 2 CH 2 ClCl 3，CF 3 CCl 2 CH 2 CH 2 Cl和CF 3 CCl 2 CH 2 CHClF。 这些化合物可用作生产氢氟烃的中间体。 还公开了CClF 2 CH 2 CF 3与HF的共沸物和CF 3 CH 2 CHF 2与HF的共沸物质; 生产这种共沸物的方法也是如此。 还公开了从这些化合物与HF的混合物中纯化某些氢氟烃和/或其氯前体的方法。

    Catalytic hydrogenolysis
    2.
    发明授权
    Catalytic hydrogenolysis 失效
    催化氢解

    公开(公告)号：US06218587B1

    公开(公告)日：2001-04-17

    申请号：US08313941

    申请日：1994-09-27

    Applicant: V. N. Mallikarjuna Rao

    Inventor： V. N. Mallikarjuna Rao

    IPC: C07C1710

    CPC classification number: B01J23/40 ,  B01J21/18 ,  B01J23/44 ,  B01J23/75 ,  B01J23/755 ,  C07C17/23

    Abstract: Catalytic hydrogenolysis of fluorohalocarbons (e.g., CFCs) and fluorohalohydrocarbons (e.g., HCFCs), using low-phosphorous, low-sulfur catalysts of Re, Co, Ni, Ru, Rh, Pd, Os, Ir, and/or Pt on carbon. Preferred catalysts are acid-washed and also have a low content of potassium, sodium and iron.

    Abstract translation: 使用Re，Co，Ni，Ru，Rh，Pd，Os，Ir和/或Pt在碳上的低磷，低硫催化剂来氟化卤代烃（例如CFC）和氟代卤代烃（例如HCFC）的催化氢解。 优选的催化剂是酸洗的，并且也具有低的钾，钠和铁含量。

    Method of producing 1,1,1,2,2-pentafluoroethane a method of producing 2,-2,-diohloro-1,1,1-trifluorethane and a method of purifying 1,1,1,2 pentafluoroethane
    4.
    发明授权
    Method of producing 1,1,1,2,2-pentafluoroethane a method of producing 2,-2,-diohloro-1,1,1-trifluorethane and a method of purifying 1,1,1,2 pentafluoroethane 失效
    制备1,1,1,2,2-五氟乙烷的方法制备2，-2， - 二氯-1,1,1-三氟乙烷的方法和1,1,1,2五氟乙烷

    公开(公告)号：US06180840B2

    公开(公告)日：2001-01-30

    申请号：US09107490

    申请日：1998-06-30

    Applicant: Takashi Shibanuma ,  Yukio Homoto ,  Satoshi Komatsu ,  Toshikazu Yoshimura

    Inventor： Takashi Shibanuma ,  Yukio Homoto ,  Satoshi Komatsu ,  Toshikazu Yoshimura

    IPC: C07C1710

    CPC classification number: C07C17/395 ,  C07C19/08

    Abstract: A production method in which reaction processes are divided into two regions comprising one reaction region where mainly perchloroethylene is made to react with HF in a vapor phase in the presence of a catalyst and the other reaction region where HCFC-123 (CF3CHCl2) and/or HCFC-124 (CF3CFHCl) is made to react with HF in a vapor phase in the presence of a catalyst, the former region being kept at a higher pressure and the latter region at a lower pressure during the reaction procedure. By this method it is possible to keep the conversion of perchloroethylene at a high level while securing the life of a catalyst, and it is also possible to raise the selectivity of HFC-125. This is a method of producing HFC-125 in which the content of CFC-115 is lowered to not more than 15 vol % of the total amount of HFC-125 and CFC-115, and then CFC-115 is made to react with hydrogen in the presence of a catalyst. By this method, reaction conditions can be lightened and the absolute amount of by-products also decreased, and the effective purification of HFC-125 can be realized.

    Abstract translation: 一种制备方法，其中将反应过程分为两个区域，其中一个反应区域主要使全氯乙烯与HF在气相中在催化剂存在下反应，另一个反应区域中，HCFC-123（CF 3 CHCl 2）和/或 在催化剂存在下使HCFC-124（CF 3 CFHCl）在气相中与HF反应，在反应过程中将前一个区域保持在较高的压力，而后一个区域处于较低的压力。 通过该方法，可以保持全氯乙烯的转化率高，同时确保催化剂的寿命，并且还可以提高HFC-125的选择性。 这是生产HFC-125的方法，其中CFC-115的含量降低到不超过HFC-125和CFC-115总量的15vol％，然后使CFC-115与氢反应 在催化剂存在下。 通过该方法，可以减轻反应条件，副产物的绝对量也降低，能够实现HFC-125的有效净化。

    Method for preparing difluoromethane
    5.
    发明授权
    Method for preparing difluoromethane 失效
    制备二氟甲烷的方法

    公开(公告)号：US06700026B1

    公开(公告)日：2004-03-02

    申请号：US08751557

    申请日：1996-11-18

    Applicant: Masaru Ichikawa ,  Ryuichirou Ohnishi

    Inventor： Masaru Ichikawa ,  Ryuichirou Ohnishi

    IPC: C07C1710

    CPC classification number: C07C17/23 ,  C07C19/08

    Abstract: A method for preparing difluoromethane (CF2H2, HFC-32) by the use of reaction of dichlorodifluoromethane (CF2Cl2, CFC-12) and/or monochlorodifluoromethane (CF2ClH, HCFC-22) with hydrogen in the presence of a palladium-based catalyst can give difluoromethane at a high conversion and a high selectivity.

    Abstract translation: 通过使用二氯二氟甲烷（CF 2 Cl 2，CFC-12）和/或一氯二氟甲烷（CF 2 ClH，HCFC-22）与氢在钯基催化剂存在下的反应来制备二氟甲烷（CF2H2，HFC-32）的方法可以得到 二氟甲烷具有高转化率和高选择性。

    Halofluorocarbon hydrogenolysis
    7.
    发明授权
    Halofluorocarbon hydrogenolysis 失效
    卤代烃氢解

    公开(公告)号：US06291729B1

    公开(公告)日：2001-09-18

    申请号：US08351908

    申请日：1994-12-08

    Applicant: V. N. Mallikarjuna Rao

    Inventor： V. N. Mallikarjuna Rao

    IPC: C07C1710

    CPC classification number: C07C17/23 ,  C07C19/08 ,  C07C19/10

    Abstract: A highly selective process is disclosed for the hydrogenolysis of 2,2-dichlorohexafluoropropane (i.e., CFC-216aa or CF3CCl2CF3) to 2,2-dihydrohexafluoropropane (i.e., HFC-236fa or CF3CH2CF3) and 2-chloro-2-hydrohexafluoropropane (i.e., 226da or CF3CHClCF3). The process involves reacting the starting material with hydrogen at an elevated temperature of about 300° C. or less in the presence of a catalyst containing a catalytically effective amount of palladium supported on a support of fluorinated alumina and/or aluminum fluoride.

    Abstract translation: 公开了一种高选择性方法，用于将2,2-二氯六氟丙烷（即CFC-216aa或CF 3 CCl 2 CF 3）氢解为2,2-二氢六氟丙烷（即HFC-236fa或CF 3 CH 2 CF 3）和2-氯-2-氢六氟丙烷（即， 226da或CF3CHClCF3）。 该方法包括在含有催化有效量的负载在氟化氧化铝和/或氟化铝载体上的钯的催化剂存在下，在约300℃或更低的升高的温度下使原料与氢反应。

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