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22 条记录 (耗时 0.018 秒)

    Azeotrope-like compositions of difluoromethane and chlorine
    1.
    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。

    Process for the preparation of halogenated ethanes
    4.
    发明授权
    Process for the preparation of halogenated ethanes 有权
    制备卤代乙烷的方法

    公开(公告)号：US06417413B1

    公开(公告)日：2002-07-09

    申请号：US09432748

    申请日：1999-11-03

    申请人： Gustavo Cerri ,  Yuon Chiu ,  Biju Z. Perincheril

    发明人： Gustavo Cerri ,  Yuon Chiu ,  Biju Z. Perincheril

    IPC分类号： C07C1700

    CPC分类号： C07C17/21 ,  C07C17/383 ,  C07C19/08 ,  C07C19/12

    摘要： A process for preparing halogenated ethanes, particularly pentafluoroethane, from a mixture produced by the reaction of perchloroethylene, hydrogen fluoride and a recycle stream. The preferred process utilizes phase separation techniques to ensure that less than the azzeotropic amount of HF is included in the product stream, thereby minimizing the hydrogen fluoride that is carried off with the desired products after they are separated from the reaction mixture, and at the same time prevents undesirable byproducts from being recycled to the reaction.

    摘要翻译： 由通过全氯乙烯，氟化氢和再循环料流反应制备的混合物制备卤代乙烷，特别是五氟乙烷的方法。 优选的方法利用相分离技术来确保在产物流中包含小于除气体量的HF，从而最小化与所需产物在从反应混合物中分离出来后所携带的氟化氢，同时 时间阻止不期望的副产物被再循环到反应中。

    Process for regenerating a catalyst used in production of olefins by catalytic ether decomposition
    5.
    发明授权
    Process for regenerating a catalyst used in production of olefins by catalytic ether decomposition 失效
    通过催化乙醚分解再生生产烯烃催化剂的方法

    公开(公告)号：US5223464A

    公开(公告)日：1993-06-29

    申请号：US683769

    申请日：1991-04-10

    申请人： Robert C. Michaelson ,  Gustavo Cerri

    发明人： Robert C. Michaelson ,  Gustavo Cerri

    IPC分类号： B01J21/20 ,  B01J38/48 ,  B01J38/52 ,  C07C1/20

    CPC分类号： B01J38/52 ,  B01J21/20 ,  B01J38/48 ,  C07C1/20 ,  C07C2521/16 ,  C07C2527/11 ,  C07C2527/1206 ,  Y02P20/584

    摘要： A process for regenerating a catalyst which involves washing a catalyst with a liquid at a temperature within the range of about 50.degree. C. to about 70.degree. C. for a time sufficient to remove foulants thereby recovering catalyst activity. The wash liquid is preferably a member selected from the group consisting of ethers, alcohols and mixtures of ethers and alcohols wherein the ether is a tertiary alkyl ether, preferably selected from the group consisting of tertiary amyl methyl ether and methyl tertiary butyl ether, and wherein the alcohol is preferably selected from the group consisting of tertiary butyl alcohol and methanol. The catalyst is preferably a clay treated with an acid selected from the group consisting of hydrofluoric acid, hydrochloric acid and mixtures of hydrofluoric and hydrochloric acid, wherein the clay is preferably selected from the group consisting of montmorillonite, kaolinite, attapulgite, bentoninte and natural clay.

    摘要翻译： 一种用于再生催化剂的方法，其包括在约50℃至约70℃的温度范围内用液体洗涤催化剂足够的时间以除去污垢，从而回收催化剂活性。 洗涤液优选为选自醚，醇和醚和醇的混合物的成员，其中醚是叔烷基醚，优选选自叔戊基甲基醚和甲基叔丁基醚，其中 醇优选选自叔丁醇和甲醇。 催化剂优选是用选自氢氟酸，盐酸和氢氟酸和盐酸的混合物的酸处理的粘土，其中粘土优选选自蒙脱石，高岭石，绿坡缕石，底香皂素和天然粘土 。

    Process for regenerating a catalyst and resultant regenerated catalyst and production of olefins by catalytic ether decomposition using regenerated catalyst
    6.
    发明授权
    Process for regenerating a catalyst and resultant regenerated catalyst and production of olefins by catalytic ether decomposition using regenerated catalyst 失效
    用于再生催化剂和所得再生催化剂的方法以及通过使用再生催化剂的催化醚分解生产烯烃的方法

    公开(公告)号：US5043518A

    公开(公告)日：1991-08-27

    申请号：US387162

    申请日：1989-07-31

    申请人： Robert C. Michaelson ,  Gustavo Cerri

    发明人： Robert C. Michaelson ,  Gustavo Cerri

    IPC分类号： B01J21/16 ,  B01J21/20 ,  B01J38/48 ,  B01J38/50 ,  B01J38/52 ,  C07C1/20 ,  C07C11/09 ,  C07C11/10 ,  C10G3/00

    CPC分类号： B01J38/52 ,  B01J21/20 ,  B01J38/48 ,  C07C1/20 ,  C07C2521/16 ,  C07C2527/11 ,  C07C2527/1206 ,  Y02P20/584 ,  Y02P30/20

    摘要： A process for regenerating a catalyst which involves washing a catalyst with a liquid at a temperature within the range of about 50.degree. C. to about 70.degree. C. for a time sufficient to remove foulants thereby recovering catalyst activity. The wash liquid is preferably a member selected from the group consisting of ethers, alcohols and mixtures of ethers and alcohols wherein the ether is a tertiary alkyl ether, preferably selected from the group consisting of tertiary amyl methyl ether and methyl tertiary butyl ether, and wherein the alcohol is preferably selected from the group consisting of tertiary butyl alcohol and methanol. The catalyst is preferably a clay treated with an acid selected from the group consisting of hydrofluoric acid, hydrochloric acid and mixtures of hydrofluoric and hydrochlorica acid, wherein the clay is preferably selected from the group consisting of montmorillonite, kaolinite, attapulgite, bentonite and natural clay.

    摘要翻译： 一种用于再生催化剂的方法，其包括在约50℃至约70℃的温度范围内用液体洗涤催化剂足够的时间以除去污垢，从而回收催化剂活性。 洗涤液优选为选自醚，醇和醚和醇的混合物的成员，其中醚是叔烷基醚，优选选自叔戊基甲基醚和甲基叔丁基醚，其中 醇优选选自叔丁醇和甲醇。 催化剂优选是用选自氢氟酸，盐酸和氢氟酸和氢氯酸的混合物的酸处理的粘土，其中粘土优选选自蒙脱石，高岭石，绿坡缕石，膨润土和天然粘土 。