Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroethane and
1,1,1-trifluoroethane
    1.
    发明授权
    Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroethane and 1,1,1-trifluoroethane 失效
    共1,1,1,2-四氟乙烷五氟乙烷和1,1,1-三氟乙烷共生产方法

    公开(公告)号:US5659094A

    公开(公告)日:1997-08-19

    申请号:US591705

    申请日:1996-01-25

    摘要: A process for co-production of 1,1,1,2-tetrafluoroethane (HFC-134a;CF.sub.3 CH.sub.2 F), pentafluoroethane (HFC-125; CF.sub.3 CHF.sub.2) and 1,1,1 -trifluoroethane (HFC-143a; CF.sub.3 CH.sub.3) by a two-step gaseous reaction comprising the steps of a) reacting 1,1,1-trifluoro-2-chloroethane (CFCH.sub.2 Cl, HCFC-133a) with HF in a first reactor to prepare 1,1,1,2-tetrafluoroethane (HFC-134a; CF.sub.3 CH.sub.2 F), pentafluoroethane (HFC-125; CF.sub.3 CHF.sub.2) and 1,1,1-trifluoroethane (HFC-143a; CF.sub.3 CH.sub.3); b) adding trichloroethylene (TCE:CCl.sub.2 CHCl) to the reaction product of step a) in a second reactor to prepare HCFC-133a; separating HCl, HFC-134a, HFC-125 and HFC-143a from the reaction product of step b) and recycling HCFC-133a to the first reactor, and the stages being performed in the presence of fluorization catalyst obtained by calcining a reaction product which is obtained by reacting ethanol with a mixture of calcium fluoride(CaF.sub.2) with an aqueous solution of chromium trioxide, zinc chloride and ferrous chloride is provided.

    摘要翻译: 一种通过两个共同生产1,1,1,2-四氟乙烷(HFC-134a; CF3CH2F),五氟乙烷(HFC-125; CF3CHF2)和1,1,1-三氟乙烷(HFC-143a; CF3CH3)的方法 包括以下步骤:a)在第一反应器中使1,1,1-三氟-2-氯乙烷(CFCH2Cl,HCFC-133a)与HF反应制备1,1,1,2-四氟乙烷(HFC-134a ; CF 3 CH 2 F),五氟乙烷(HFC-125; CF 3 CHF 2)和1,1,1-三氟乙烷(HFC-143a; CF 3 CH 3); b)在第二反应器中将三氯乙烯(TCE:CCl 2 CHCl)加入到步骤a)的反应产物中以制备HCFC-133a; 从步骤b)的反应产物中分离出HCl,HFC-134a,HFC-125和HFC-143a,并将HCFC-133a再循环到第一反应器中,这些阶段在通过煅烧反应产物得到的氟化催化剂存在下进行, 通过乙醇与氟化钙(CaF 2)与三氧化铬的水溶液,氯化锌和氯化亚铁的混合物反应获得。

    Method for concurrently producing 1,1,1,2-tetrafluoroethane and
pentafluoroethane
    2.
    发明授权
    Method for concurrently producing 1,1,1,2-tetrafluoroethane and pentafluoroethane 失效
    同时生产1,1,1,2-四氟乙烷和五氟乙烷的方法

    公开(公告)号:US5723700A

    公开(公告)日:1998-03-03

    申请号:US708466

    申请日:1996-09-05

    摘要: There is a method for concurrently producing 1,1,1,2-tetrafluoroethane and pentafluoroethane, which comprises (A) reacting 1,1,1-trifluoro-2-chloroethane, hydrogen fluoride and chlorine in a first reactor in the presence of flurorination catalyst at a temperature in the range of from 300.degree. C. to 450.degree. C.; (B) transfering the products of step (A) together with trichloroethylene to a second reactor and reacting them at a temperature in the range of from 200.degree. C. to 400.degree. C.; (C) separating 1,1,1,2-tetrafluoroethane and pentafluoroethane from the resultant products; and (D) feeding the remaining products from step (C) back to the first reactor, wherein the molar ratio of chlorine/1,1,1-trifluoro-2-chloroethanethe in step (A) is in the range of from 0.001 to 0.05

    摘要翻译: 有一种同时生产1,1,1,2-四氟乙烷和五氟乙烷的方法,该方法包括(A)在第一反应器中在氟化物存在下使1,1,1-三氟-2-氯乙烷,氟化氢和氯反应 催化剂在300℃至450℃的温度范围内。 (B)将步骤(A)的产物与三氯乙烯一起转移到第二反应器中,并在200℃至400℃的温度下反应。 (C)从所得产物中分离1,1,1,2-四氟乙烷和五氟乙烷; 和(D)将来自步骤(C)的剩余产物反馈回第一反应器,其中步骤(A)中氯/ 1,1,1-三氟-2-氯乙烷的摩尔比在0.001至 0。

    Catalyst for fluorination of 1,1,1,-trifluoro-2,2-dichloroethane and
method for preparing the same
    3.
    发明授权
    Catalyst for fluorination of 1,1,1,-trifluoro-2,2-dichloroethane and method for preparing the same 失效
    用于氟化1,1,1-三氟-2,2-二氯乙烷的催化剂及其制备方法

    公开(公告)号:US5571770A

    公开(公告)日:1996-11-05

    申请号:US490726

    申请日:1995-06-15

    摘要: There are a catalyst for fluorination production of 1,1,1-trifluoro-2,2-dichloroethane comprises chromium, one compound selected from the group consisting of Mg and Ca and at least one metal component selected from the group consisting of Zn, Ce and Ni, wherein the molar ratio of Cr to Mg or Ca ranges from 1:1 to 1:32 and the molar ratio Cr to the metal component is not more than 1:0.5, and method for preparing the same comprising the steps of; producing an admixture of a composition comprising chromium, one compound selected from the group consisting of magnesium fluoride and calcium fluoride and at least one metal compound selected from a group consisting of cerium fluoride, zinc fluoride and nickel fluoride with water and refluxing the admixture in methanol or ethanol.

    摘要翻译: 具有1,1,1-三氟-2,2-二氯乙烷的氟化生产催化剂包括铬,一种选自Mg和Ca的化合物和至少一种选自Zn,Ce 和Ni,其中Cr与Mg或Ca的摩尔比范围为1:1至1:32,并且金属组分的摩尔比Cr不大于1:0.5,及其制备方法包括以下步骤: 制备包含铬的组合物的混合物,一种选自氟化镁和氟化钙的化合物和至少一种选自氟化铈,氟化锌和氟化镍的金属化合物与水并将该混合物在甲醇中回流 或乙醇。

    Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
    6.
    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)。

    Method for concurrently producing different hydrofluoro carbons
    7.
    发明授权
    Method for concurrently producing different hydrofluoro carbons 失效
    同时生产不同氢氟碳的方法

    公开(公告)号:US5959166A

    公开(公告)日:1999-09-28

    申请号:US966093

    申请日:1997-11-07

    摘要: A method for concurrently producing different hydrofluoro carbons, comprising the reaction of halocarbon or hydrohalocarbon with hydrogen fluoride in a reaction system consisting of a series of at least two discrete reactors, in the presence of catalysts, said reactors each being provided with different reactant materials and differing in reaction conditions including the catalysts and/or reaction temperature, thereby flexibly controlling their production rates in accordance with fluctuations in their demand, and eliminating the risk of constructing large scale plants responsible for individual hydrofluorocarbons.

    摘要翻译: 一种同时生产不同氢氟碳的方法,包括在由一系列至少两个不连续的反应器组成的反应体系中,在催化剂存在下,卤代烃或氢卤化碳与氟化氢的反应,所述反应器各自具有不同的反应物料和 包括催化剂和/或反应温度在内的反应条件不同,从而根据其需求的波动灵活地控制其生产率,并消除构建负责单个氢氟碳化物的大型设备的风险。

    Process for preparing n,n'-disubstituted urea using selenium-based
catalyst
    8.
    发明授权
    Process for preparing n,n'-disubstituted urea using selenium-based catalyst 有权
    使用硒基催化剂制备n,n'-二取代脲的方法

    公开(公告)号:US6127575A

    公开(公告)日:2000-10-03

    申请号:US395388

    申请日:1999-09-13

    CPC分类号: C07C273/1809 C07C2101/14

    摘要: A process is disclosed for preparing N,N'-disubstituted urea by reacting an amine and CO/O.sub.2 mixture gas in the presence of a catalyst system comprising at least one selenium compound selected from SeO.sub.2, (CH.sub.3 O)Se(O)(OH) and (CH.sub.3 CH.sub.2 O)Se(O)(OH), and M.sub.2 CO.sub.3 (M=alkali metal) as a co-catalyst. The process enables less active aromatic amine with a low reactivity as well as an aliphatic amine to be easily transformed into disubstituted urea avoiding the use of expensive precious metal catalysts.

    摘要翻译: 公开了一种通过在包含至少一种选自SeO 2,(CH 3 O)Se(O)(OH))的硒化合物的催化剂体系存在下使胺和CO / O 2混合气体反应来制备N,N'-二取代的脲的方法, 和(CH 3 CH 2 O)Se(O)(OH)和作为助催化剂的M2CO3(M =碱金属)。 该方法使得具有低反应性的较少活性的芳族胺以及脂族胺易于转化为二取代的脲,避免使用昂贵的贵金属催化剂。

    Polyolefin foam beads having high density crust and method for manufacturing the same
    10.
    发明授权
    Polyolefin foam beads having high density crust and method for manufacturing the same 失效
    具有高密度地壳的聚烯烃泡沫珠及其制造方法

    公开(公告)号:US06476088B1

    公开(公告)日:2002-11-05

    申请号:US09761568

    申请日:2001-01-16

    IPC分类号: C08J922

    摘要: Polyolefin foam bead having a high-density crust and a method for manufacturing the same are disclosed. The novel polyolefin foam bead having an surface layer (crust) which is higher in density than its inner structure can be manufactured by the method comprised of impregnating a polyolefin resin with a forming agent by stirring the mixture of the polyolefin resin particles, water and the foaming agent in a pressure vessel under heat, followed by diffusing out the foaming agent from the surface layer of the resin particle to decrease the concentration of the foaming agent in the surface layer. Thereafter, the polyolefin resin is foamed by discharging the resin particles to low pressure environment.

    摘要翻译: 公开了具有高密度地壳的聚烯烃泡沫珠及其制造方法。 具有密度高于其内部结构的表面层(外壳)的新型聚烯烃泡沫珠粒可以通过以下方法制造:将聚烯烃树脂浸渍在成形剂中,通过搅拌聚烯烃树脂颗粒,水和 发泡剂在加热的压力容器中,然后从树脂颗粒的表面层扩散出发泡剂,以降低发泡剂在表面层中的浓度。 此后,聚烯烃树脂通过将树脂颗粒排放到低压环境而发泡。