Loop Reactor With Varying Diameter For Olefin Polymerization
    25.
    发明申请
    Loop Reactor With Varying Diameter For Olefin Polymerization 有权
    环烯烃反应器用于烯烃聚合的不同直径

    公开(公告)号:US20080119624A1

    公开(公告)日:2008-05-22

    申请号:US10572817

    申请日:2004-09-16

    IPC分类号: C08F2/00

    摘要: Process for polymerizing at least one olefinic monomer selected from ethylene, propylene and 1-butene in a loop reactor in the presence of a polymerization catalyst at from 20 to 150° C., but below the melting point of a polymer to be formed, and a pressure of from 43 to 80 bar, where the polymer formed is present in a suspension in a liquid or supercritical suspension medium and wherein the suspension is circulated by means of an axial pump, wherein the polymerization is carried out at an average solids concentration in the reactor of more than 53% by weight, in the case of continuous product discharge, and at an average solids concentration in the reactor of more than 45% by weight, in the case of discontinuous product discharge, and wherein the polymerization is carried out at an ethylene concentration of at least 10 mol %, based on the suspension medium.

    摘要翻译: 在聚合催化剂存在下,在环状反应器中,在20〜150℃,但低于待形成的聚合物的熔点,聚合至少一种选自乙烯,丙烯和1-丁烯的烯烃单体的方法,以及 其中形成的聚合物存在于液体或超临界悬浮介质中的悬浮液中,并且其中悬浮液通过轴向泵循环,其中聚合以平均固体浓度进行 反应器在连续产物排出的情况下大于53重量%,反应器中的平均固体浓度大于45重量%,在不连续的产物排出的情况下,并且其中进行聚合 基于悬浮介质,乙烯浓度至少为10摩尔%。

    Preparation of pyrroles
    27.
    发明授权
    Preparation of pyrroles 有权
    吡咯的制备

    公开(公告)号:US6162928A

    公开(公告)日:2000-12-19

    申请号:US553254

    申请日:2000-04-20

    摘要: A process for preparing pyrroles of the formula I: ##STR1## where R.sub.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and are hydrogen atoms, alkyl groups having from 1 to 12 carbon atoms or cycloalkyl groups having from 3 to 12 carbon atoms, by dehydrogenation of pyrrolidines of the formula II: ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined above, in the presence of a supported noble metal catalyst is described. In this process, the dehydrogenation is carried out at from 150 to 300.degree. C. and pressures of from 0.01 to 50 bar and the noble metal catalyst comprises from 30 to 100% by weight of:a) palladium on an oxide of a rare earth or an oxide of an element of the 4.sup.th group (transition group IV) of the Periodic Table, orb) a platinum/palladium mixture on aluminum oxide, an oxide of a rare earth or an oxide of an element of the 4.sup.th groupand from 0 to 70% by weight of alkali metal oxide or alkaline earth metal oxide.

    摘要翻译: 制备式I的吡咯的方法:其中R 1,R 2,R 3和R 4相同或不同,为氢原子,具有1至12个碳原子的烷基或具有3至12个碳原子的环烷基,通过脱氢 描述了在负载的贵金属催化剂的存在下,式II的吡咯烷(其中R 1,R 2,R 3和R 4如上定义)。 在该方法中,脱氢在150-300℃,压力为0.01至50巴,贵金属催化剂包含30-100重量%的:a)在稀土氧化物上的钯 或元素周期表第4族元素(过渡组IV)的氧化物,或b)在氧化铝上的铂/钯混合物,稀土的氧化物或第4族元素的氧化物, 0〜70重量%的碱金属氧化物或碱土金属氧化物。

    Process for preparing phthalides
    28.
    发明授权
    Process for preparing phthalides 失效
    制备苯酞的方法

    公开(公告)号:US6020501A

    公开(公告)日:2000-02-01

    申请号:US214512

    申请日:1999-01-07

    CPC分类号: C07D307/88

    摘要: The disclosure is a process for preparing a phthalide of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently of the others hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, by hydrogenation of a phthalic anhydride of the general formula II ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined above, with the aid of a hydrogenation catalyst, which comprises performing the hydrogenation with the aid of a nickel catalyst doped with metals of subgroup 1, subgroup 6 and/or subgroup 7 of the Periodic Table.

    摘要翻译: PCT No.PCT / EP97 / 03303 Sec。 一九九九年一月七日 102(e)1999年1月7日PCT 1997年6月24日PCT公布。 公开号WO98 / 01438 日本1998年1月15日本公开是制备通式I的苯并膦的方法,其中R 1,R 2,R 3和R 4各自独立地为氢,C 1 -C 4 - 烷基或C 1 -C 4 - 烷氧基, 通式II的邻苯二甲酸酐,其中R 1,R 2,R 3和R 4各自如上所定义,借助于氢化催化剂,其包括使用掺杂有亚组1的金属的镍催化剂进行氢化,亚组 6和/或第7组。

    Preparation of aromatic aldehydes
    29.
    发明授权
    Preparation of aromatic aldehydes 失效
    芳香醛的制备

    公开(公告)号:US5763676A

    公开(公告)日:1998-06-09

    申请号:US793055

    申请日:1997-02-14

    摘要: Aromatic aldehydes are prepared by catalytically reacting aromatic carboxylic acids or their esters with hydrogen in the gas phase at from 200.degree. to 450.degree. C. and from 0.1 to 20 bar in the presence of a zirconium dioxide/lanthanide catalyst having a high BET surface area of from 20 to 150 m.sup.2 /g, preferably from 40 to 150 m.sup.2 /g. The proportions by weight of the catalytically active mass range from 80 to 99.9% by weight of zirconium dioxide and from 0.01 to 20 %by weight of one or more lanthanide elements. This catalyst provides very high conversion rates of 94 to 100% together with a correspondingly high selectivity for the aldehyde product.

    摘要翻译: PCT No.PCT / EP95 / 03167 Sec。 371日期1997年2月14日 102(e)1997年2月14日PCT PCT 1995年8月10日PCT公布。 公开号WO96 / 05161 日期1996年2月22日芳族醛通过在二氧化锆/镧系元素催化剂存在下,在200〜450℃和0.1-20巴的气相中使芳香族羧酸或其酯与氢气进行催化反应来制备, 高BET表面积为20至150m2 / g,优选为40至150m2 / g。 催化活性物质的重量比范围为80-99.9重量%的二氧化锆和0.01至20重量%的一种或多种镧系元素。 该催化剂提供94至100%的非常高的转化率以及醛产物相应的高选择性。

    Preparation of cyclic amines
    30.
    发明授权
    Preparation of cyclic amines 失效
    环胺的制备

    公开(公告)号:US5663438A

    公开(公告)日:1997-09-02

    申请号:US516147

    申请日:1995-08-17

    CPC分类号: C07C209/68 C07C209/16

    摘要: A process for the preparation of a phenyl amine which may be substituted by alkyl or cycloalkyl in which the corresponding cyolohexylamine is reduced at temperatures of 150.degree. to 300.degree. C. and pressures of 0.01 to 50 bar in the presence of a heterogeneous dehydrogenation catalyst consisting essentially of palladium or a palladium/platinum mixture supported on carrier consisting of the oxides of rare earth metals and and metals of Group IVb of the Periodic Table of Elements, with the proviso that the palladium/platinum mixture may also be supported on an alumina carrier. The cyclohexylamine reactant can be advantageously prepared by reacting the corresponding phenol with ammonia and hydrogen at 100.degree. to 250.degree. C. in the presence of the same heterogeneous catalyst as a preliminary step to provide a two stage process using the same catalyst in both stages.

    摘要翻译: 制备苯基胺的方法,其可以被烷基或环烷基取代,其中相应的环己胺在150-300℃的温度和0.01至50巴的压力下在存在非均相脱氢催化剂的条件下还原, 基本上由负载在由稀土金属的氧化物构成的载体上的钯或钯/铂混合物和元素周期表IVb族金属组成,条件是钯/铂混合物也可以负载在氧化铝载体上 。 环己胺反应物可以有利地通过在相同的非均相催化剂的存在下在100-250℃下使相应的苯酚与氨和氢反应来制备,以提供在两个阶段中使用相同催化剂的两阶段方法。