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342 条记录 (耗时 0.018 秒)

    Process for preparing polyfluorooxetanes
    32.
    发明授权
    Process for preparing polyfluorooxetanes 失效
    聚氟氧杂环丁烷的制备方法

    公开(公告)号：US5519151A

    公开(公告)日：1996-05-21

    申请号：US205927

    申请日：1994-03-03

    申请人： Viacheslav A. Petrov ,  Bruce E. Smart

    发明人： Viacheslav A. Petrov ,  Bruce E. Smart

    IPC分类号： B01J27/12 ,  B01J27/125 ,  C07D305/08

    CPC分类号： C07D305/08

    摘要： This invention concerns a process for the preparation of polyfluorooxetanes by the reaction of fluoroketones or fluoroepoxides with haloethylenes in the presence of a Lewis acid catalyst. Polyfluorooxetanes are useful as solvents and plasticizers having high thermal stability.

    摘要翻译： 本发明涉及通过在路易斯酸催化剂存在下通过氟代酮或氟代环氧化物与卤代乙烯的反应来制备聚氟氧杂环丁烷的方法。 聚氟氧杂环丁烷可用作具有高热稳定性的溶剂和增塑剂。

    Olefin polymers prepared by polymerization with treated alumina supported chromium
    35.
    发明授权
    Olefin polymers prepared by polymerization with treated alumina supported chromium 失效
    通过用处理的氧化铝负载的铬进行聚合制备的烯烃聚合物

    公开(公告)号：US5401820A

    公开(公告)日：1995-03-28

    申请号：US993488

    申请日：1992-12-18

    申请人： Max P. McDaniel ,  Paul D. Smith ,  Donald D. Norwood

    发明人： Max P. McDaniel ,  Paul D. Smith ,  Donald D. Norwood

    IPC分类号： C08F4/00 ,  B01J21/12 ,  B01J27/125 ,  B01J27/18 ,  C01B7/00 ,  C01B9/08 ,  C01B13/14 ,  C01B33/12 ,  C01B33/149 ,  C01F7/02 ,  C08F4/02 ,  C08F4/24 ,  C08F4/60 ,  C08F4/62 ,  C08F4/69 ,  C08F10/00 ,  C08F10/14

    CPC分类号： C08F10/00

    摘要： In one embodiment of this invention a surface silicated alumina composition, as opposed to conventional silica alumina, is provided. Such composition may also be fluorided and/or phosphated or phosphited. The resulting compositions are broadly useful but are of particular applicability as supports for chromium olefin polymerization catalysts. In another aspect alumina is fluorided and used with hexavalent chromium catalyst and a co-catalyst or in the alternative with an organochromium catalyst. If desired the support in this embodiment can also be phosphated or phosphited. In another embodiment, aluminum phosphate is formed in the pores of alumina. In contrast with alumina catalyst supports of the prior art, the supports of this invention allow for the production of olefin polymers at high rates of productivity. Also novel high density ultrahigh molecular weight polymers are produced.

    摘要翻译： 在本发明的一个实施方案中，提供了与常规二氧化硅氧化铝相反的表面硅化氧化铝组合物。 这种组合物也可以被氟化和/或磷酸化或磷酸化。 所得组合物广泛可用，但作为铬烯烃聚合催化剂的载体具有特别的适用性。 另一方面，将氧化铝氟化并与六价铬催化剂和助催化剂一起使用，或者用有机铬催化剂代替。 如果需要，本实施方案中的载体也可以被磷酸化或磷酸化。 在另一个实施方案中，在氧化铝的孔中形成磷酸铝。 与现有技术的氧化铝催化剂载体相反，本发明的载体允许以高生产率生产烯烃聚合物。 还生产出新型的高密度超高分子量聚合物。

    Process for the manufacture of 2-chloro-1,1,1,2-tetrafluoroethane and pentafluoroethane
    37.
    发明授权
    Process for the manufacture of 2-chloro-1,1,1,2-tetrafluoroethane and pentafluoroethane 失效
    制备2-氯-1,1,1,2-四氟乙烷和五氟乙烷的方法

    公开(公告)号：US5300710A

    公开(公告)日：1994-04-05

    申请号：US672870

    申请日：1991-03-20

    申请人： David R. Corbin ,  V. N. Mallikarjuna Rao

    发明人： David R. Corbin ,  V. N. Mallikarjuna Rao

    IPC分类号： B01J27/138 ,  B01J23/06 ,  B01J27/125 ,  C07B61/00 ,  C07C17/20 ,  C07C17/08

    CPC分类号： C07C17/206 ,  B01J23/06 ,  B01J27/125

    摘要： A process is disclosed for producing HCFC-124 and HFC-125 which includes reacting certain pentahaloethane starting materials (e.g., CF.sub.3 CHCl.sub.2) in the gaseous phase at an elevated temperature in the presence of certain supported metal catalysts containing effective amounts of zinc. A catalyst of metal fluoride on a fluorinated alumina support having an atomic ratio of F to Al of at least 2.7:1 and containing .beta.-aluminmum fluoride, is employed.

    摘要翻译： 公开了一种用于生产HCFC-124和HFC-125的方法，其包括在含有有效量的锌的某些负载型金属催化剂的存在下，在高温下使某些五卤乙烷原料（例如CF 3 CHCl 2）在气相中反应。 使用原子比为F至Al至少为2.7:1且含有（β） - 氟化铝的氟化氧化铝载体上的金属氟化物的催化剂。

    Process for producing 3,3',4,4'-tetramethyldiphenylmethane
    38.
    发明授权
    Process for producing 3,3',4,4'-tetramethyldiphenylmethane 失效
    制备3,3'，4,4'-四甲基二苯基甲烷的方法

    公开(公告)号：US5254768A

    公开(公告)日：1993-10-19

    申请号：US832712

    申请日：1992-02-07

    申请人： Shuta Kihara

    发明人： Shuta Kihara

    IPC分类号： B01J27/12 ,  B01J27/125 ,  C07B61/00 ,  C07C5/27 ,  C07C15/16 ,  C07C51/265 ,  C07C51/275 ,  C07C5/22

    CPC分类号： C07C51/265 ,  C07C5/2732 ,  C07C51/275 ,  Y02P20/582

    摘要： There is provided a process for producing 3,3',4,4'-tetramethyldiphenylmethane which comprises subjecting tetramethyldiphenylmethane containing at least one of 2,3,3',4'-tetramethyldiphenylmethane and 2,2',3,3'-tetramethyldiphenylmethane to isomerization reaction in the presence of a catalyst to convert into 3,3',4,4'-tetramethyldiphenylmethane. According to the process of the present invention, the objective 3,3',4,4'-tetramethyldiphenylmethane is efficiently obtained from tetramethyldiphenylmethane obtainable in particular by the reaction of o-xylene with formaldehyde. The 3,3',4,4'-tetramethyldiphenylmethane thus obtained can be converted by oxidation into 3,4,3',4'-benzophenonetetracarboxylic acid dianhydride which is important as a raw material for heat-resistant high molecular compounds.

    Process for phenol alkylthiolation and its application to the synthesis of 4-acyl-2-alkylthiophenols
    40.
    发明授权
    Process for phenol alkylthiolation and its application to the synthesis of 4-acyl-2-alkylthiophenols 失效
    酚醛酸酯化方法及其在4-乙酰基-2-羟基苯乙酮合成中的应用

    公开(公告)号：US5113019A

    公开(公告)日：1992-05-12

    申请号：US607224

    申请日：1990-11-05

    申请人： Catherine Vottero ,  Yves Labat ,  Jean-Marie Poirier

    发明人： Catherine Vottero ,  Yves Labat ,  Jean-Marie Poirier

    IPC分类号： C07B61/00 ,  B01J27/125 ,  B01J27/128 ,  C07C319/14 ,  C07C319/20 ,  C07C323/16 ,  C07C323/20 ,  C07C323/22

    CPC分类号： C07C319/14 ,  C07C319/20

    摘要： The invention relates to the preparation of alkylthiophenols by reaction of a dialkyl disulphide with a phenol.In the process according to the invention, the reaction is carried out in the presence of aluminum chloride or of ferric chloride in a solvent of the alkylbenzene type or, soley in the case of methylthiolation, in an excess of dimethyl disulphide.This process makes it possible, in particular to obtain, with a selectivity and in a yield which are excellent, 2-alkylthiophenols which may then be converted into 4-acyl-2-alkylthiophenols by means of a reaction at a temperature ranging from 40.degree. to 100.degree. C. with a complex BF.sub.3 :2RCOOH where R denotes an alkyl or propenyl radical, in a proportion of 10 to 15 moles of complex per mole of 2-alkylthiophenol.

    摘要翻译： 本发明涉及通过二烷基二硫醚与苯酚的反应来制备烷基硫酚。 在根据本发明的方法中，反应在氯化铝或氯化铁存在下，在烷基苯类溶剂中或在甲硫醇化反应的情况下在过量二甲基二硫化物中进行。 该方法特别可以通过选择性和产率优异的2-烷基硫酚获得，然后可以通过在40℃的温度下反应转化成4-酰基-2-烷基硫酚 至100℃，其中R表示烷基或丙烯基，其摩尔比为10-35摩尔配合物/摩尔2-烷基苯硫酚。