Process for preparing palladium on carbon catalysts for purification of
crude terephthalic acid
    1.
    发明授权
    Process for preparing palladium on carbon catalysts for purification of crude terephthalic acid 失效
    制备用于纯对苯二甲酸的钯碳催化剂的方法

    公开(公告)号:US4476242A

    公开(公告)日:1984-10-09

    申请号:US507707

    申请日:1983-06-23

    摘要: A catalyst, a process for preparing said catalyst, and a process for producing purified terephthalic acid, wherein 4-carboxybenzaldehyde is reduced to very low levels, wherein said catalyst is prepared by contacting a solution of a suitable palladium salt in an organic solvent with a suitable activated carbon support, wherein said palladium salt is reduced to palladium metal crystallites by said activated carbon support. Purified terephthalic acid is prepared by hydrogenating crude terephthalic acid in the presence of said catalyst.

    摘要翻译: 一种催化剂,一种制备所述催化剂的方法和一种生产纯化对苯二甲酸的方法,其中4-羧基苯甲醛被还原成非常低的水平,其中所述催化剂是通过使合适的钯盐在有机溶剂中的溶液与 合适的活性炭载体,其中所述钯盐由所述活性炭载体还原成钯金属微晶。 纯化的对苯二甲酸通过在所述催化剂存在下氢化粗对苯二甲酸来制备。

    Catalyst and process for purification of crude terephthalic acid
    2.
    发明授权
    Catalyst and process for purification of crude terephthalic acid 失效
    用于纯化粗对苯二甲酸的催化剂和方法

    公开(公告)号:US4791226A

    公开(公告)日:1988-12-13

    申请号:US587947

    申请日:1984-03-09

    摘要: A catalyst, a process for preparing said catalyst, and a process for producing purified terephthalic acid, wherein 4-carboxybenzaldehyde is reduced to very low levels, wherein said catalyst is prepared by contacting a solution of a suitable palladium salt in an organic solvent with a suitable activated carbon support, wherein said palladium salt is reduced to palladium metal crystallites by said activated carbon support. Purified terephthalic acid is prepared by hydrogenating crude terephthalic acid in the presence of said catalyst.

    摘要翻译: 一种催化剂,一种制备所述催化剂的方法和一种生产纯化对苯二甲酸的方法,其中4-羧基苯甲醛被还原成非常低的水平,其中所述催化剂是通过使合适的钯盐在有机溶剂中的溶液与 合适的活性炭载体,其中所述钯盐由所述活性炭载体还原成钯金属微晶。 纯化的对苯二甲酸通过在所述催化剂存在下氢化粗对苯二甲酸来制备。

    Imide nitrogen dibenzofurans polymers
    5.
    发明授权
    Imide nitrogen dibenzofurans polymers 失效
    酰亚胺氮二苯并呋喃聚合物

    公开(公告)号:US4138392A

    公开(公告)日:1979-02-06

    申请号:US798335

    申请日:1977-05-19

    摘要: The present disclosure relates to a new composition of matter dibenzofuran-2,3,6,7,-tetracarboxylic acid dianhydride and polymers derived therefrom including polyamic acid or polyimide polymers formed from the reaction of the above dianhydride and a diamine. The claimed dianhydride finds use as an excellent cross-linking moiety. Condensation polymers derived from the dianhydride and diamines are useful in the production of films and fibers with good thermal stability.

    摘要翻译: 本公开涉及物质二苯并呋喃-2,3,6,7-四羧酸二酐和由其衍生的聚合物的新组合物,包括由上述二酐与二胺反应形成的聚酰胺酸或聚酰亚胺聚合物。 所要求的二酐可用作优异的交联部分。 衍生自二酐和二胺的缩合聚合物可用于制备具有良好热稳定性的薄膜和纤维。

    Alkenylation catalysts
    6.
    发明授权
    Alkenylation catalysts 失效
    烯化催化剂

    公开(公告)号:US4034052A

    公开(公告)日:1977-07-05

    申请号:US617368

    申请日:1975-09-29

    申请人: Imre Puskas

    发明人: Imre Puskas

    IPC分类号: C07C2/72 C07C3/00

    摘要: Unsaturated amines, primary and secondary saturated amines, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethyl-1,3-propanediamine, and ammonia cocatalysis with alkali metals for alkenylation of alkylaromatics having benzylic hydrogen with conjugated diolefins of 4-15 carbon atoms. Improved trans:cis product ratio and improved yield are produced by these nitrogen containing cocatalysts.

    摘要翻译: 不饱和胺,伯和仲饱和胺,N,N,N',N'-四甲基乙二胺,N,N,N',N'-四甲基-1,3-丙二胺和与碱金属进行氨共催化用于烷基芳族化合物的烯基化反应 具有4-15个碳原子的共轭二烯烃的苄基氢。 通过这些含氮助催化剂产生改进的反式:顺式产物比例和提高的产率。

    Tar reduction by inorganic halide for reaction of unsaturated anhydride
and polybutene
    7.
    发明授权
    Tar reduction by inorganic halide for reaction of unsaturated anhydride and polybutene 失效
    用不饱和酸酐和聚丁烯反应的无机卤化物焦油还原

    公开(公告)号:US3935249A

    公开(公告)日:1976-01-27

    申请号:US358914

    申请日:1973-05-10

    CPC分类号: C07C51/567 C08F8/46

    摘要: Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3,000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when reacted in the presence of rather small amounts, i.e., 5 to 200 ppm, of inorganic halogen preferably chlorine and/or bromine containing compounds. Use of such halogen containing compounds in the addition reaction of polybutene with said unsaturated anhydrides can reduce formation of undesired tarry product resulting from polymerization and/or thermal decomposition of the unsaturated anhydrides.

    摘要翻译: 数均分子量(Mn)在约300至约3,000范围内的粘性聚丁烯在非常少量(即5至200ppm)的无机卤素的存在下反应时具有改善的不饱和脂族二羧酸的分子内酸酐的反应性 优选含氯和/或溴的化合物。 在聚丁烯与所述不饱和酸酐的加成反应中使用这种含卤素化合物可以减少由不饱和酸酐的聚合和/或热分解产生的不期望的焦油产物的形成。

    Method for manufacture of AMS-1B crystalline borosilicate molecular
sieve with low sodium content
    8.
    发明授权
    Method for manufacture of AMS-1B crystalline borosilicate molecular sieve with low sodium content 失效
    低钠含量的AMS-1B结晶硼硅酸分子筛的制备方法

    公开(公告)号:US4514516A

    公开(公告)日:1985-04-30

    申请号:US528847

    申请日:1983-09-02

    申请人: Imre Puskas

    发明人: Imre Puskas

    IPC分类号: B01J29/86 C01B35/10

    CPC分类号: B01J29/86 C01B35/1009

    摘要: AMS-1B crystalline borosilicate molecular sieve is prepared by reacting under crystallization conditions an aqueous mixture containing sources for an oxide of silicon, an oxide of boron, a cation and a lower alkyl primary or secondary amine.

    摘要翻译: 通过在结晶条件下使含有硅氧化物,硼氧化物,阳离子和低级烷基伯胺或仲胺的含水混合物反应制备AMS-1B结晶硼硅酸盐分子筛。