Preparation of pyrroles
    86.
    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

    CPC classification number: C07D207/323 B01J23/44 B01J23/63

    Abstract: 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.

    Abstract translation: 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 unsaturated cyclic ethers
    87.
    发明授权
    Process for preparing unsaturated cyclic ethers 失效
    不饱和环醚的制备方法

    公开(公告)号:US6063939A

    公开(公告)日:2000-05-16

    申请号:US226144

    申请日:1999-01-07

    CPC classification number: B01J27/045 B01J23/8913 C07D309/18

    Abstract: Unsaturated cyclic ethers of the formula I ##STR1## whereZ is --(CHR.sup.4).sub.q -- or --(CHR.sup.4).sub.q --O--,q is 0, 1, 2 or 3 andR.sup.1,R.sup.2,R.sup.3,R.sup.4 are hydrogen or C.sub.1 -C.sub.4 -alkylare prepared by reacting diols of the formula II ##STR2## where Z, R.sup.1, R.sup.2 and R.sup.3 are as defined above, in the liquid phase at from 150 to 300.degree. C. in the presence of a cobalt-containing supported catalyst which has not been activated by reduction before use and comprises cobalt and a noble metal selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium, osmium, rhenium or a mixture thereof applied by sol impregnation on an inert support, wherein the supported catalyst is doped with sulfur. Sulfur-doped supported catalysts comprising cobalt and noble metals are also provided.

    Abstract translation: Z为 - (CHR 4)q-或 - (CHR 4)q O - ,q为0,1,2或3且R 1,R 2,R 3,R 4为氢或C 1 -C 4烷基的式I的不饱和环醚为 通过使其中Z,R 1,R 2和R 3如上所定义的式II的二醇在150-300℃的液相中,在没有被还原活化的含钴担载催化剂存在下反应制备 并且包括钴和选自铂,钯,铑,铱,钌,锇,铼的贵金属或其通过溶胶浸渍施加到惰性载体上的混合物,其中负载型催化剂掺杂有硫。 还提供了包含钴和贵金属的硫掺杂负载型催化剂。

    Preparation of polytetrahydrofuran
    88.
    发明授权
    Preparation of polytetrahydrofuran 失效
    聚四氢呋喃的制备

    公开(公告)号:US5773648A

    公开(公告)日:1998-06-30

    申请号:US793987

    申请日:1997-03-07

    CPC classification number: C08G65/266 B01J23/24 C08G65/20 C08G65/2693

    Abstract: A process for the preparation of polytetrahydrofuran or polytetrahydrofuran monoesters of C.sub.1 -C.sub.10 monocarboxylic acids by the polymerization of tetrahydrofuran over a heterogeneous catalyst in the presence of one of the telogens water, 1,4-butanediol or polytetrahydrofuran having a molecular weight of from 200 to 700 dalton or a C.sub.1 -C.sub.10 monocarboxylic acid or mixtures of these telogens, wherein a supported catalyst is used as catalyst, which contains a catalytically active amount of an oxygen-containing tungsten or molybdenum compound or mixtures of these compounds on an oxidic support material and which was calcined at temperatures ranging from 500.degree. to 1000.degree. C. following the application of the precursor compounds of said oxygen-containing molybdenum and/or tungsten compounds to the support material precursor.

    Abstract translation: PCT No.PCT / EP95 / 03651 Sec。 371日期1997年3月10日 102(e)1997年3月10日PCT PCT 1995年9月21日PCT公布。 公开号WO96 / 09335 日期:1996年3月28日一种通过四氢呋喃在多相催化剂上的存在下,在一种具有分子量的四氢呋喃水,1,4-丁二醇或聚四氢呋喃的存在下,通过四氢呋喃的聚合制备C1-C10单羧酸的聚四氢呋喃或聚四氢呋喃单酯的方法 重量为200至700道尔顿或C1-C10单羧酸或其混合物,其中使用负载催化剂作为催化剂,其含有催化活性量的含氧钨或钼化合物或这些化合物的混合物在 氧化载体材料,并且在将所述含氧钼和/或钨化合物的前体化合物施加到载体材料前体之后,在500℃至1000℃的温度下煅烧。

    Preparation of cyclic amines
    89.
    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 classification number: C07C209/68 C07C209/16

    Abstract: 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.

    Abstract translation: 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。

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