Catalyst and method for producing 1,1-difluoroethane
    1.
    发明申请
    Catalyst and method for producing 1,1-difluoroethane 失效
    催化剂和1,1-二氟乙烷的制备方法

    公开(公告)号:US20020107421A1

    公开(公告)日:2002-08-08

    申请号:US09897899

    申请日:2001-07-05

    CPC classification number: B01J37/22 B01J21/18 B01J23/44 C07C17/23 C07C19/08

    Abstract: The present invention relates to a catalyst for producing 1,1-difluoroethane (HCFC-152a) and producing method thereof. More particularly, it is to provide the catalyst prepared by impregnating palladium on the active carbon pretreated with an aqueous hydrogen fluoride solution and an aqueous hydrogen chloride solution in series and its use in the production of 1,1-difluoroethane (HCFC-142b) by dehydrochlorinating 1,1-difluoro-1-chloroethane at 240-300null C. in the supplying molar ratio of 2-6 (H2/HCFC-142b) with maximizing a selectivity toward the product of HCFC-152a.

    Abstract translation: 本发明涉及一种生产1,1-二氟乙烷(HCFC-152a)的催化剂及其制备方法。 更具体地说,提供催化剂,其通过在用氟化氢水溶液和氯化氢水溶液预处理的活性炭上浸渍钯,并将其用于生产1,1-二氟乙烷(HCFC-142b)中的用途 在240-300℃下,以2-6(H 2 / HCFC-142b)的供应摩尔比脱氯化氢,使HCFC-152a产物的选择性最大化。

    REFRIGERANT MIXTURE COMPRISING DIFLUROMETHANE, PENTAFLUROETHANE AND 1,1,1-TRIFLUOROETHANE
    2.
    发明申请
    REFRIGERANT MIXTURE COMPRISING DIFLUROMETHANE, PENTAFLUROETHANE AND 1,1,1-TRIFLUOROETHANE 失效
    包含二氟甲磺酸,蓬蒿素和1,1,1-三氟乙烯的制冷混合物

    公开(公告)号:US20030111635A1

    公开(公告)日:2003-06-19

    申请号:US10338139

    申请日:2003-01-08

    Abstract: 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).

    Abstract translation: 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)。

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