利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

19 条记录 (耗时 0.023 秒)

    Procedure for producing hydroquinone
    5.
    发明授权
    Procedure for producing hydroquinone 失效
    生产氢醌的方法

    公开(公告)号：US4801758A

    公开(公告)日：1989-01-31

    申请号：US51736

    申请日：1987-05-18

    申请人： Salme Koskimies ,  Taru Haimala

    发明人： Salme Koskimies ,  Taru Haimala

    IPC分类号： C07C20060101 ,  C07C37/08 ,  C07C39/08 ,  C07C50/04 ,  C07C39/10

    CPC分类号： C07C37/08

    摘要： A procedure for producing hydroquinone from a hydrocarbon mixture obtained as a by-product when producing cumene, by selectively oxidizing tertiary alkylaromatics to form hydroperoxides, by separating the dihydroperoxide of p-diisopropylbenzene from the oxidation product by selective crystallization through cooling, and by decomposing the dihydroperoxide of p-diisopropylbenzene with the aid of an acid catalyst to form the hydroquinone.

    Process for preparing and purifying complex esters
    7.
    发明授权
    Process for preparing and purifying complex esters 失效
    制备和纯化复合酯的方法

    公开(公告)号：US06362362B1

    公开(公告)日：2002-03-26

    申请号：US09402329

    申请日：1999-10-04

    申请人： Jari Koistinen ,  Kari Rissanen ,  Salme Koskimies

    发明人： Jari Koistinen ,  Kari Rissanen ,  Salme Koskimies

    IPC分类号： C07C6700

    CPC分类号： C07C67/60 ,  C07C69/50 ,  C07C69/44

    摘要： The invention concerns a process for manufacturing polyol complex esters. According to the method, a polyol, such as BEPD or NPG, is reacted with mono- and polyvalent acids in the presence of a catalyst to produce a reaction blend containing complex esters. According to the invention the acid components of the reaction blend are neutralized with a tertiary amine, and the complex esters are recovered from the thus treated reaction blend. The basic amines that are used form salt-like compounds with the carboxylic acids. The compounds enter the aqueous phase, from which they are easily separated, whereby the complex esters are recovered with high yield.

    摘要翻译： 本发明涉及制备多元醇复合酯的方法。 根据该方法，多元醇如BEPD或NPG在催化剂的存在下与单价和多价酸反应以产生含有复合酯的反应混合物。 根据本发明，用叔胺中和反应混合物的酸组分，并从如此处理的反应混合物中回收络合酯。 使用的碱性胺与羧酸形成盐状化合物。 化合物进入水相，从中容易分离，由此以高产率回收络合酯。

    Process for selective hydrogenation of unsaturated polymers
    8.
    发明授权
    Process for selective hydrogenation of unsaturated polymers 失效
    不饱和聚合物的选择性氢化方法

    公开(公告)号：US5814710A

    公开(公告)日：1998-09-29

    申请号：US704656

    申请日：1996-12-04

    申请人： Petri Rekonen ,  Nina Kopola ,  Salme Koskimies ,  Ove Andell ,  Marita Oksman

    发明人： Petri Rekonen ,  Nina Kopola ,  Salme Koskimies ,  Ove Andell ,  Marita Oksman

    IPC分类号： C08C19/02 ,  C08F8/04

    CPC分类号： C08C19/02 ,  C08F8/04

    摘要： The invention relates to the selective hydrogenation of unsaturated polymers, in particular elastomeric polymers which contain aromatic rings and carbon-carbon double rings, for example polymers prepared from styrene and butadiene. In this case, the polymer molecule contains internal and terminal-group double bonds, as well as unsaturated bonds in aromatic rings. According to the invention, only the unsaturated terminal and internal bonds are hydrogenated, whereby the thermal and weather resistance properties of the product are improved. Conventionally, hydrogenation has been performed by means of nickel or cobalt catalysts, but now it has been observed that a metallocene/alumoxane catalyst complex not only catalyzes the polymerization reaction of various olefinic compounds but also catalyzes the selective hydrogenation of unsaturated polymers, preferably styrene-butadiene-styrene block polymers.

    摘要翻译： PCT No.PCT / FI95 / 00120 Sec。 371日期1996年12月4日第 102（e）日期1996年12月4日PCT提交1995年3月3日PCT公布。 公开号WO95 / 25130 日期1995年9月21日本发明涉及不饱和聚合物的选择性氢化，特别是含有芳环和碳 - 碳双环的弹性体聚合物，例如由苯乙烯和丁二烯制备的聚合物。 在这种情况下，聚合物分子含有内部和末端基团双键以及芳环中的不饱和键。 根据本发明，只有不饱和端和内键被氢化，从而提高了产品的耐热和耐候性。 通常，通过镍或钴催化剂进行氢化，但现在观察到茂金属/铝氧烷催化剂络合物不仅催化各种烯烃化合物的聚合反应，而且还催化不饱和聚合物的选择性氢化，优选苯乙烯 - 丁二烯 - 苯乙烯嵌段聚合物。