利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.011 秒)

    Process for the purification of a pentafluoroethane azeotrope
    1.
    发明授权
    Process for the purification of a pentafluoroethane azeotrope 失效
    纯化五氟乙烷共沸物的方法

    公开(公告)号：US5346595A

    公开(公告)日：1994-09-13

    申请号：US23827

    申请日：1993-02-23

    申请人： Paul G. Clemmer ,  Hsueh S. Tung ,  Addison M. Smith

    发明人： Paul G. Clemmer ,  Hsueh S. Tung ,  Addison M. Smith

    IPC分类号： B01D3/14 ,  C07B63/00 ,  C07C17/383 ,  C07C19/08 ,  C07C17/38

    CPC分类号： C07C17/383 ,  B01D3/14 ,  Y10S203/13

    摘要： The invention generally relates to a process for the purification of a component of a binary azeotrope in which the composition of the azeotrope changes by about 10 mole percent with pressure comprising:(a) subjecting a binary azeotrope to a distillation step in which most of one of the binary components is removed as distillate (distillate 1) with the bottoms (bottoms 1) enriched in the other component;(b) subjecting distillate 1 to at least one additional distillation step conducted at a different pressure in which most of the component recovered as bottoms 1 is removed as distillate 2 with the bottoms 2 enriched in the component enriched in distillate 1;(c) optionally repeating step (b) as many times as desired; and(d) recovering the desired purified component.The invention is particularly useful in the purification of pentafluoroethane in a pentafluoroethane/chloropentafluoroethane azeotrope.

    摘要翻译： 本发明一般涉及纯化二元共沸物组分的方法，其中共沸物的组成随压力变化约10摩尔％，包括：（a）使二元共沸物进行蒸馏步骤，其中大部分 的二元组分作为馏出物（馏出物1）除去富含其它组分的塔底物（塔底物1）; （b）使馏出物1进行至少一个另外的蒸馏步骤，在不同的压力下进行另外的蒸馏步骤，其中作为塔底馏出物1回收的大部分组分作为馏出物2被除去，富含富含馏分1的组分富含塔底物2; （c）任选地重复步骤（b）多次; 和（d）回收所需的纯化组分。 本发明特别可用于五氟乙烷/氯五氟乙烷共沸物中五氟乙烷的提纯。

    Catalyst for the manufacture of chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons
    2.
    发明授权
    Catalyst for the manufacture of chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons 失效
    氯氟碳化合物，氢氯氟烃和氢氟烃的制备催化剂

    公开(公告)号：US5155082A

    公开(公告)日：1992-10-13

    申请号：US684636

    申请日：1991-04-12

    申请人： Hsueh S. Tung ,  Addison M. Smith

    发明人： Hsueh S. Tung ,  Addison M. Smith

    IPC分类号： B01J23/26 ,  B01J37/26 ,  C07C17/20 ,  C07C17/21

    CPC分类号： C07C17/206 ,  B01J23/26 ,  B01J37/26 ,  C07C17/21

    摘要： The invention relates to a novel catalyst and process for producing various chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons said catalyst prepared by co-extruding aluminum/chromium oxide and optionally impregnating the aluminum/chromium oxide support with a metal salt. The chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons, i.e., e.g., 1,1-dichloro-2,2,2-trifluoroethane, produced using the catalyst of the invention are useful in a variety of industrial applications including blowing agent, refrigerant, sterilant gas and solvent applications.

    摘要翻译： 本发明涉及用于生产各种氯氟烃，氢氯氟烃和氢氟烃的新型催化剂和方法，所述催化剂通过共挤出铝/铬氧化物并任选地用金属盐浸渍铝/铬氧化物载体而制备。 使用本发明的催化剂制备的氯氟烃，氢氯氟烃和氢氟烃，即例如1,1-二氯-2,2,2-三氟乙烷可用于各种工业应用，包括发泡剂，制冷剂，杀菌剂气体和溶剂 应用程序。

    Chromia aerogel, method of producing same and fluorination process utilizing same
    3.
    发明授权
    Chromia aerogel, method of producing same and fluorination process utilizing same 失效
    Chromia气凝胶，其制备方法和利用其的氟化方法

    公开(公告)号：US4912270A

    公开(公告)日：1990-03-27

    申请号：US282545

    申请日：1988-12-12

    申请人： Emery J. Carlson ,  John N. Armor ,  William J. Cunningham ,  Addison M. Smith

    发明人： Emery J. Carlson ,  John N. Armor ,  William J. Cunningham ,  Addison M. Smith

    IPC分类号： B01J23/26 ,  B01J37/00 ,  C01G37/02 ,  C07C17/20

    CPC分类号： C01G37/02 ,  B01J23/26 ,  B01J37/00 ,  C07C17/206 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/80 ,  C01P2006/82

    摘要： Chromium(III) oxide and hydroxide aerogels are produced by the reaction of chromium(VI) oxide with a solvent which is reducing to chromium(VI), such as methanol, heating the solution to hypercritical conditions, and venting the solvent hypercritically. The product aerogels exhibit surface areas above 400 m.sup.2 /g, pore volumes of at least 2 cm.sup.3 /g and a substantially uniform pore size distribution. Also disclosed is a unique process which employs high pore volume, high surface area chromium(III) oxide or hydroxide as a fluorination catalyst. More particularly, reaction of C.sub.2 Cl.sub.3 F.sub.3 with HF over these catalysts produced high yields of C.sub.2 Cl.sub.2 F.sub.4 and C.sub.2 ClF.sub.5.

    摘要翻译： 氧化铬（III）和氢氧化物气凝胶是通过氧化铬（VI）与还原成铬（VI）的溶剂如甲醇的反应生成的，将溶液加热至超临界条件，并使溶剂过度排放。 产品气凝胶表现出高于400m 2 / g的表面积，孔体积至少为2cm 3 / g，孔径分布基本均匀。 还公开了采用高孔体积，高表面积的氧化铬（III）或氢氧化物作为氟化催化剂的独特方法。 更具体地说，C2Cl3F3与HF在这些催化剂上的反应产生高产率的C 2 Cl 2 F 4和C 2 ClF 5。

    Chromium aerogel method of producing same and fluorinating process utilizing same
    4.
    发明授权
    Chromium aerogel method of producing same and fluorinating process utilizing same 失效
    铬气凝胶法及其制备方法及氟化方法

    公开(公告)号：US4828818A

    公开(公告)日：1989-05-09

    申请号：US124372

    申请日：1987-11-23

    申请人： Emery J. Carlson ,  John N. Armor ,  William J. Cunningham ,  Addison M. Smith

    发明人： Emery J. Carlson ,  John N. Armor ,  William J. Cunningham ,  Addison M. Smith

    IPC分类号： B01J23/26 ,  B01J37/00 ,  C01G37/02 ,  C07C17/20

    CPC分类号： C01G37/02 ,  B01J23/26 ,  B01J37/00 ,  C07C17/206 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/16 ,  C01P2006/60

    摘要： Chromium(III) oxide and hydroxide aerogels are produced by the reaction of chromium(VI) oxide with a solvent which is reducing to chromium(VI), such as methanol, heating the solution to hypercritical conditions, and venting the solvent hypercritically. The product aerogels exhibit surface areas above 400 m.sup.2 /g, pore volumes of at least 2 cm.sup.3 /g and a substantially uniform pore size distribution. Also disclosed is a unique process which employs high pore volume, high surface area chromium(III) oxide or hydroxide as a fluorination catalyst. More particularly, reaction of C.sub.2 Cl.sub.3 F.sub.3 with HF over these catalysts produced high yields of C.sub.2 Cl.sub.2 F.sub.4 and C.sub.2 ClF.sub.5.

    摘要翻译： 氧化铬（III）和氢氧化物气凝胶是通过氧化铬（VI）与还原成铬（VI）的溶剂如甲醇的反应生成的，将溶液加热至超临界条件，并使溶剂过度排放。 产品气凝胶表现出高于400m2 / g的表面积，孔体积至少为2cm 3 / g，孔径分布基本均匀。 还公开了采用高孔体积，高表面积的氧化铬（III）或氢氧化物作为氟化催化剂的独特方法。 更具体地说，C2Cl3F3与HF在这些催化剂上的反应产生高产率的C 2 Cl 2 F 4和C 2 ClF 5。

    Single stage process for producing hydrofluorocarbons from perchloroethylene
    5.
    发明授权
    Single stage process for producing hydrofluorocarbons from perchloroethylene 失效
    从全氯乙烯生产氢氟烃的单阶段工艺

    公开(公告)号：US5545778A

    公开(公告)日：1996-08-13

    申请号：US248981

    申请日：1994-05-25

    申请人： Hsueh S. Tung ,  Addison M. Smith ,  Charles F. Swain

    发明人： Hsueh S. Tung ,  Addison M. Smith ,  Charles F. Swain

    IPC分类号： C07C17/087 ,  C07B61/00 ,  C07C17/21 ,  C07C17/35 ,  C07C17/38 ,  C07C17/383 ,  C07C19/08 ,  C07C19/12 ,  C07C17/08

    CPC分类号： C07C17/21 ,  C07C17/383

    摘要： A process for the preparation of one or more of CHClFCF.sub.3 (HCFC-124), CHF.sub.2 CClF.sub.2 (HCFC-124a) and CHF.sub.2 CF.sub.3 (HFC-125) by reaction of perchloroethylene with hydrogen fluoride in a single stage reaction vessel in the presence of a fluorination catalyst. These compounds are useful in a variety of industrial applications including blowing agents, refrigerants, sterilant gases and solvent applications. Distilling the reaction product produces a distillate comprising HCl, CHClFCF.sub.3, CHF.sub.2 CClF.sub.2 and CHF.sub.2 CF.sub.3 and a minor amount of HF which distillate is scrubbed to remove the acids. The bottoms product comprises perchloroethylene, hydrogen fluoride and organic by-products which is phase separated to sequester the hydrogen fluoride from the mixture of perchloroethylene and organic by-products. The hydrogen fluoride and mixture of perchloroethylene with organic by-products are then preferably re-mixed at a controlled rate and recycled to the reaction vessel.

    摘要翻译： 在氟化催化剂存在下，在单级反应容器中通过全氯乙烯与氟化氢的反应制备CHClFCF3（HCFC-124），CHF2CClF2（HCFC-124a）和CHF2CF3（HFC-125）中的一种或多种的方法 。 这些化合物可用于各种工业应用，包括发泡剂，制冷剂，灭菌气体和溶剂应用。 蒸馏反应产物产生包含HCl，CHClFCF 3，CHF 2 CClF 2和CHF 2 CF 3的馏出物和少量HF，该馏出物被洗涤以除去酸。 底部产物包括全氯乙烯，氟化氢和有机副产物，其相分离以从全氯乙烯和有机副产物的混合物中隔离氟化氢。 然后将氟化氢和全氯乙烯与有机副产物的混合物优选以受控的速率重新混合并再循环至反应容器。

    Azeotrope-like compositions of difluoromethane and chlorine
    8.
    发明授权
    Azeotrope-like compositions of difluoromethane and chlorine 失效
    二氟甲烷和氯类共沸组合物

    公开(公告)号：US6099694A

    公开(公告)日：2000-08-08

    申请号：US46095

    申请日：1998-03-23

    申请人： Hang Thanh Pham ,  Rajiv R. Singh ,  Addison M. Smith ,  David P. Wilson ,  Raymond Hilton Percival Thomas ,  Gustavo Cerri

    发明人： Hang Thanh Pham ,  Rajiv R. Singh ,  Addison M. Smith ,  David P. Wilson ,  Raymond Hilton Percival Thomas ,  Gustavo Cerri

    IPC分类号： C01B7/01 ,  C07C19/08 ,  B01D3/36 ,  B01D3/42 ,  C07C17/386 ,  C07C19/03

    CPC分类号： C01B7/01 ,  C07C19/08

    摘要： The invention relates to an improvement in a process in which chlorine and difluoromethane are present in a distillation column, for example, a fluorination reaction. By controlling the chlorine feed such that the concentration of chlorine relative to difluoromethane in the distillation column is maintained below about 22 weight percent (the flammability threshold for chlorine in a mixture of difluoromethane and chlorine), formation of a flammable difluoromethane/chlorine mixture may be minimized or avoided. The invention is particularly useful in a process for the preparation of difluoromethane wherein at least one distillation column separates difluoromethane from unreacted starting materials such as methylene chloride, hydrogen fluoride and monochloromonofluoromethane.

    摘要翻译： 本发明涉及在蒸馏塔中存在氯和二氟甲烷的方法的改进，例如氟化反应。 通过控制氯进料使得相对于蒸馏塔中的二氟甲烷的氯浓度保持在约22重量％以下（二氟甲烷和氯的混合物中的氯的可燃性阈值），可燃二氟甲烷/氯混合物的形成可以是 最小化或避免。 本发明特别可用于制备二氟甲烷的方法，其中至少一个蒸馏塔将二氟甲烷与未反应的起始原料如二氯甲烷，氟化氢和一氯一氟甲烷分离。