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    • 3. 发明授权
    • Methods of producing 1,1,1,2,2-pentafluoroethane
    • 生产1,1,1,2,2-五氟乙烷的方法
    • US5750809A
    • 1998-05-12
    • US513755
    • 1995-09-05
    • Takashi ShibanumaYukio HomotoSatoshi KomatsuToshikazu Yoshimura
    • Takashi ShibanumaYukio HomotoSatoshi KomatsuToshikazu Yoshimura
    • C07C17/20C07C17/21C07C17/395C07C19/08C07C17/08
    • C07C17/206C07C17/21C07C17/395
    • 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.
    • 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。
    • 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
    • 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
    • US06180840B2
    • 2001-01-30
    • US09107490
    • 1998-06-30
    • Takashi ShibanumaYukio HomotoSatoshi KomatsuToshikazu Yoshimura
    • Takashi ShibanumaYukio HomotoSatoshi KomatsuToshikazu Yoshimura
    • C07C1710
    • C07C17/395C07C19/08
    • 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.
    • 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。