Method for producing difluoromethane and 1,1,1,2-tetrafluoroethane
    1.
    发明授权
    Method for producing difluoromethane and 1,1,1,2-tetrafluoroethane 失效
    生产二氟甲烷和1,1,1,2-四氟乙烷的方法

    公开(公告)号:US5849963A

    公开(公告)日:1998-12-15

    申请号:US656229

    申请日:1996-06-07

    摘要: According to the method for producing difluoromethane and 1,1,1,2-tetrafluoroethane, having the steps of: (1) reacting methylene chloride and 1,1,2-trichloroethylene with hydrogen fluoride in a vapor phase In the presence of a fluorinating catalyst and 1,1,1,2-tetrafluoroethane in a first reactor; and (2) reacting 1,1,1-trifluorochloroethane with hydrogen fluoride in a vapor phase in the presence of a fluorinating catalyst in a second reactor, and supplying the reaction mixture from the second reactor to the first reactor, HFC-32 can be obtained in high conversion and high selectivity by fluorinating HCC-30 using commonly a large (excess) amount of HF which is required for producing HFC-134a.

    摘要翻译: PCT No.PCT / JP94 / 02070 Sec。 371日期1996年6月7日第 102(e)日期1996年6月7日PCT 1994年12月9日PCT PCT。 公开号WO95 / 15937 日期:1995年6月15日根据生产二氟甲烷和1,1,1,2-四氟乙烷的方法,具有以下步骤:(1)使二氯甲烷和1,1,2-三氯乙烯与氟化氢在气相In 在第一反应器中存在氟化催化剂和1,1,1,2-四氟乙烷; 和(2)在第二反应器中,在氟化催化剂存在下,在气相中使1,1,1-三氟氯乙烷与氟化氢反应,并将反应混合物从第二反应器供应到第一反应器,HFC-32可以 通过使用通常产生HFC-134a所需的大量(过量)的HF来氟化HCC-30而以高转化率和高选择性获得。

    Methods of producing 1,1,1,2,2-pentafluoroethane
    2.
    发明授权
    Methods of producing 1,1,1,2,2-pentafluoroethane 失效
    生产1,1,1,2,2-五氟乙烷的方法

    公开(公告)号:US5750809A

    公开(公告)日:1998-05-12

    申请号:US513755

    申请日:1995-09-05

    摘要: 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 (CF.sub.3 CHCl.sub.2) and/or HCFC-124 (CF.sub.3 CFHCl) 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.

    摘要翻译: PCT No.PCT / JP94 / 00348 Sec。 371 1995年9月5日第 102(e)日期1995年9月5日PCT 1994年3月3日PCT公布。 WO94 / 20441 PCT出版物 日期1994年9月15日一种制备方法,其中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,另一个反应区域是HCFC-123( CF 3 CHCl 2)和/或HCFC-124(CF 3 CFHCl)在气相中在催化剂存在下与HF反应,前一区域保持在较高压力,后一区域在反应过程中处于较低压力。 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 of producing 1,1,1,2,2-pentafluoroethane, a method of producing
2,2-dichloro-1,1,1-trifluoroethane, and a method of purifying
1,1,1,2,2-pentafluoroethane
    3.
    发明授权
    Method of producing 1,1,1,2,2-pentafluoroethane, a method of producing 2,2-dichloro-1,1,1-trifluoroethane, and a method of purifying 1,1,1,2,2-pentafluoroethane 失效
    制造1,1,1,2,2-五氟乙烷的方法,2,2-二氯-1,1,1-三氟乙烷的制造方法以及1,1,1,2,2-五氟乙烷

    公开(公告)号:US5847244A

    公开(公告)日:1998-12-08

    申请号:US23881

    申请日:1998-02-13

    摘要: A production method in which reaction processes are divided into two regions comprising one reaction region where mainly perohloroethylene is made to react with HF in a vapor phase in the presence of a catalyst and the other reaction region where HCFC-123 (CF.sub.3 CHCl.sub.2) and/or HCFC-124 (CF.sub.3 CFHCl) 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.

    摘要翻译: 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四氯乙烯与HF在气相中在催化剂存在下反应,另一个反应区域是HCFC-123(CF3CHCl2)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 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

    IPC分类号: C07C1710

    CPC分类号: C07C17/395 C07C19/08

    摘要: 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.

    摘要翻译: 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。

    Process for producing pentafluoroethane and tetrafluorochloroethane
    6.
    发明授权
    Process for producing pentafluoroethane and tetrafluorochloroethane 失效
    生产五氟乙烷和四氟氯乙烷的方法

    公开(公告)号:US6011185A

    公开(公告)日:2000-01-04

    申请号:US894472

    申请日:1997-08-20

    摘要: There is provided a process for producing HFC-125 and/or HCFC-124 from PCE, characterized by the first reaction step of fluorinating PCE in the presence of catalyst in a liquid phase to form HCFC-123 and/or HCFC-122 and the second reaction step of fluorinating HCFC-123 and/or HCFC-122 in the presence of catalyst in a vapor phase to form HFC-125 and/or HCFC-124.This process is improved in the yield of objective products, and life of catalyst, and the controllability of reaction temperature.

    摘要翻译: PCT No.PCT / JP96 / 00401 Sec。 371日期1997年8月20日 102(e)日期1997年8月20日PCT 1996年2月22日PCT公布。 出版物WO96 / 26172 日本1996年8月29日提供了从PCE生产HFC-125和/或HCFC-124的方法,其特征在于在催化剂存在下在液相中氟化PCE的第一反应步骤,形成HCFC-123和/或 HCFC-122和在催化剂存在下在气相中氟化HCFC-123和/或HCFC-122以形成HFC-125和/或HCFC-124的第二反应步骤。 该方法提高了目标产物的产率,催化剂的使用寿命和反应温度的可控性。

    Process of separating pentafluoroethane and process of producing
pentafluoroethane using the same
    7.
    发明授权
    Process of separating pentafluoroethane and process of producing pentafluoroethane using the same 失效
    分离五氟乙烷的方法及使用其制备五氟乙烷的方法

    公开(公告)号:US5849160A

    公开(公告)日:1998-12-15

    申请号:US809897

    申请日:1997-07-02

    CPC分类号: C07C17/21 C07C17/38

    摘要: Pentafluoroethane (HFC-125) is more effectively and more simply separated from a reaction mixture in a process of producing HFC-125. A gas mixture containing perchloroethylene (PCE), HFC-125, hydrogen chloride (HCl) and hydrogen fluoride (HF) is passed through the first condensation stage to obtain the first vapor phase, which is passed through the second condensation stage to obtain the second vapor phase mainly containing HFC-125 and HCl and the second liquid phase, which is passed to a distillation stage to obtain a top fraction mainly containing HFC-125 and HCl and a bottom fraction containing the rest of the second liquid phase which bottom fraction is substantially free from HFC-125 and HCl, and HCl is separated out of the second vapor phase portion and the top fraction to obtain HFC-125, a concentration of PCE in the second liquid phase being such that it does not separate into immiscible liquid phases.

    摘要翻译: PCT No.PCT / JP95 / 02048 Sec。 371日期1997年7月2日 102(e)日期1997年7月2日PCT提交1995年10月6日PCT公布。 公开号WO96 / 11176 日期:1996年4月18日在生产HFC-125的过程中,更有效且更简单地从反应混合物中分离出五氟乙烷(HFC-125)。 含有全氯乙烯(PCE),HFC-125,氯化氢(HCl)和氟化氢(HF)的气体混合物通过第一冷凝阶段以获得第一气相,其通过第二冷凝级,以获得第二级 蒸气相主要含有HFC-125和HCl以及第二液相,其通过蒸馏阶段获得主要含有HFC-125和HCl的顶馏分,以及含有其余第二液相的塔底馏分 基本上不含HFC-125和HCl,并且将HCl从第二气相部分和顶部馏分中分离出来以获得HFC-125,第二液相中的PCE浓度使得其不分离成不混溶的液相 。

    Method for preparing fluorination catalyst used to fluorinate
halogenated hydrocarbons
    8.
    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。