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151 条记录 (耗时 0.017 秒)

    Process for the preparation of oligophenyls dihalogenated in the 4,4'-position
    64.
    发明授权
    Process for the preparation of oligophenyls dihalogenated in the 4,4'-position 失效
    制备4,4'-位二卤代低聚苯基的方法

    公开(公告)号：US5053566A

    公开(公告)日：1991-10-01

    申请号：US571956

    申请日：1990-08-23

    申请人： Artur Botta ,  Hans-Josef Buysch ,  Lothar Puppe

    发明人： Artur Botta ,  Hans-Josef Buysch ,  Lothar Puppe

    IPC分类号： C07C41/22 ,  B01J29/50 ,  B01J29/60 ,  B01J29/70 ,  C07B61/00 ,  C07C17/12 ,  C07C25/18 ,  C07C41/38 ,  C07C43/225

    CPC分类号： C07C17/12

    摘要： Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,X.sup.3 denotes hydrogen, chlorine or bromine, preferably hydrogen or chlorine and particularly preferably hydrogen,R.sup.1, R.sup.2 and R.sup.3 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl (preferably methyl or ethyl and particularly preferably methyl), C.sub.1 -C.sub.4 -alkoxy (preferably methoxy or ethoxy and particularly preferably methoxy), fluorine, chlorine or bromine anda assumes the value zero or one,with halogenating agents, the preparation being carried out in the presence of methylene chloride or solvent mixtures essentially containing methylene chloride and in the presence of zeolites of the L structure type which contain metal cations.

    摘要翻译： 在式（Ⅰ）的4,4'-位上二卤代的低级苯基可以通过式（II）的低聚苯基的催化卤化来制备，其中在式中X1和X2彼此独立地 代表氯或溴，优选氯，X3表示氢，氯或溴，优选氢或氯，特别优选氢，R 1，R 2和R 3彼此独立地表示氢，C 1 -C 4烷基（优选甲基或乙基，特别优选 甲基），C1-C4-烷氧基（优选甲氧基或乙氧基，特别优选甲氧基），氟，氯或溴，并且与卤化剂呈现零或一个值，该制剂在二氯甲烷或溶剂存在下进行 基本上含有二氯甲烷的混合物和在含有金属阳离子的L结构类型的沸石的存在下。

    Regeneration of methanol/methyl ether conversion catalysts
    68.
    发明授权
    Regeneration of methanol/methyl ether conversion catalysts 失效
    甲醇/甲醚转化催化剂的再生

    公开(公告)号：US4777156A

    公开(公告)日：1988-10-11

    申请号：US524065

    申请日：1983-08-17

    申请人： Nancy P. Forbus ,  Margaret May-Som Wu

    发明人： Nancy P. Forbus ,  Margaret May-Som Wu

    IPC分类号： B01J29/50 ,  B01J29/70 ,  B01J29/90 ,  B01J38/10 ,  C07C1/20 ,  B01J29/38 ,  C07C1/24

    CPC分类号： B01J29/06 ,  B01J29/70 ,  B01J29/90 ,  C07C1/20 ,  B01J29/50 ,  B01J38/10 ,  C07C2529/50 ,  C07C2529/70 ,  Y02P20/584 ,  Y02P30/42

    摘要： A process for using hydrogen-containing gas to regenerate a zeolite catalyst comprising at least some crystalline aluminosilicate zeolitic material having pore windows formed by 8-membered rings of oxygen atoms, e.g., ZSM-34, which has been used to promote conversion of methanol and/or methyl ether to light olefins. Contact of such catalysts with hydrogen-containing gas such as hydrogen or synthesis gas at particular regeneration temperatures and pressures can restore the activity of such catalysts either in the presence or absence of organic reactants without forming potentially catalyst-damaging by-products such as water.

    摘要翻译： 一种使用含氢气体再生沸石催化剂的方法，所述沸石催化剂包含至少一些具有由8-原子氧原子形成的孔窗的结晶硅铝酸盐沸石材料，例如ZSM-34，其已用于促进甲醇的转化和 /或甲基醚至轻质烯烃。 这种催化剂与含氢气体如氢气或合成气在特定的再生温度和压力下的接触可以在有机反应物存在或不存在下形成潜在的催化剂损害性副产物如水来恢复这种催化剂的活性。