Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
    4.
    发明授权
    Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane 失效
    包含二氟甲烷,五氟乙烷和1,1,1-三氟乙烷的制冷剂混合物

    公开(公告)号:US06524495B1

    公开(公告)日:2003-02-25

    申请号:US09710578

    申请日:2000-11-09

    IPC分类号: C09K504

    摘要: A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of pentafluoroethane (CHF2CF3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH3CF3, HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), isobutane (CH(CH3)2CH3, R-600a), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).

    摘要翻译: 一种可用作HCFC-22替代物的新型制冷剂组合物,其包含二氟甲烷(CH 2 F 2,HFC-32)的第一组分; 五氟乙烷(CHF 2 CF 3,HFC-125)的第二组分; 1,1,1-三氟乙烷(CH 3 CF 3,HFC-143a)的第三组分; 选自环丙烷(C 3 H 6,RC-270),1,1,1,2,3,3,3-七氟丙烷(CF 3 CHFCF 3,HFC-227ea),1,1,1,2,2 (CH 3 CF 2 CF 3,HFC-245cb),异丁烷(CH(CH 3)2 CH 3,R-600a),八氟环丁烷(C 4 F 8,RC-318),1,1,1,2,3,3-六氟丙烷(CHF 2 CHFCF 3, 236EA),丁烷(C4H10,R-600),双(二氟甲基)醚(CHF2OCHF2,HFE-134)和五氟乙基甲基醚(CF3CF2OCH3,HFE-245)。

    Catalyst characterization apparatus
    5.
    发明授权
    Catalyst characterization apparatus 有权
    催化剂表征装置

    公开(公告)号:US06306349B1

    公开(公告)日:2001-10-23

    申请号:US09449467

    申请日:1999-11-29

    IPC分类号: G01N3110

    摘要: The present invention relates to a catalyst characterization apparatus, and in particular to an improved catalyst characterization apparatus which is capable of characterizing the surface of a catalyst more accurately by a volumetric method without requiring a pre-treatment step which may vary the characteristics of the catalyst as well as without exposing the catalyst in air, by combining a dynamic flow type reactor with a volumetric type adsorption apparatus, whereby it is possible to accurately characterize the catalyst during an actual reaction. It is possible to accurately characterize the various catalysts and to characterize the catalyst during the reaction, alternately and/or continuously, by combining a dynamic flow type reactor with a volumetric type characterization apparatus as well as a dynamic flow type characterization apparatus.

    摘要翻译: 本发明涉及一种催化剂表征装置,特别涉及一种改进的催化剂表征装置,其能够通过体积法更准确地表征催化剂的表面,而不需要可改变催化剂特性的预处理步骤 以及通过将动态流动型反应器与体积型吸附装置组合而不使空气中的催化剂暴露,由此可以在实际反应期间精确地表征催化剂。 可以通过组合动态流动型反应器与体积型表征装置以及动态流动型表征装置来交替地和/或连续地精确地表征各种催化剂并且在反应期间表征催化剂。

    Process for manufacturing 1,1,1,2-tetrafluoroethane
    6.
    发明授权
    Process for manufacturing 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:US5841007A

    公开(公告)日:1998-11-24

    申请号:US630678

    申请日:1996-04-12

    摘要: The present invention relates to a process for manufacturing 1,1,1,2-tetrafluoroethane (HFC-134a) from trichloroethylene (TCE) and hydrogen fluoride (HF) by reacting the HCFC-133a with the HF to produce the HFC-134a and reacting the TCE with the HF to produce 1-choro-2,2,2-trifluoroethane (HCFC-133a), characterized by that a part of said HF is mixed with the mixture containing the HFC-134a and the remaining portion of said HF is fed with said TCE in portions to at least two sections of a reactor for producing said HCFC-133a. According the present process, the temperature change in the reactor for producing HCFC-133a is maintained within a narrow range over the whole reaction procedures, and the catalytic activity is well maintained. Further, the formation of by-products is considerably prevented and thus the productivity is remarkably enhanced.

    摘要翻译: 本发明涉及通过使HCFC-133a与HF反应生成HFC-134a,从三氯乙烯(TCE)和氟化氢(HF)制备1,1,1,2-四氟乙烷(HFC-134a) 使TCE与HF反应以产生1-氯-2,2,2-三氟乙烷(HCFC-133a),其特征在于,将所述HF的一部分与含有HFC-134a和所述HF的剩余部分的混合物混合 与所述TCE一起供给至用于生产所述HCFC-133a的反应器的至少两个部分。 根据本方法,生产HCFC-133a的反应器中的温度变化在整个反应过程中保持在窄范围内,并且催化活性得到很好的维持。 此外,可以显着地防止副产物的形成,从而显着提高生产率。

    Method for removing moisture from chlorodifluoro-methane
    10.
    发明授权
    Method for removing moisture from chlorodifluoro-methane 失效
    从一氯二氟甲烷中除去水分的方法

    公开(公告)号:US5723702A

    公开(公告)日:1998-03-03

    申请号:US615092

    申请日:1996-03-13

    IPC分类号: C07C17/38

    CPC分类号: C07C17/38

    摘要: There is a process for removing moisture from chlorodifluoromethane (CHClF.sub.2) containing moisture in excess in the preparation of chlorodifluoromethane comprising lowering the partial pressure of water in the chlorodifluoromethane gas by contacting the chlorodifluoromethane gas with an aqueous solution of calcium chloride of more than 5% by weight.

    摘要翻译: 在一氯二氟甲烷的制备中,有一个从含有二氧化碳的氯代二氟甲烷(CHClF 2)中除去水分的方法,包括通过使氯二氟甲烷气体与氯代二氟甲烷气体的氯化钙水溶液接触超过5%的氯化钙水溶液来降低氯二氟甲烷气体的分压 重量。