Epoxidation process
    2.
    发明授权
    Epoxidation process 失效
    环氧化工艺

    公开(公告)号:US5412122A

    公开(公告)日:1995-05-02

    申请号:US172404

    申请日:1993-12-23

    摘要: Olefins are epoxidized by hydrogen peroxide in the presence of a modified titanium-containing molecular sieve having a framework structure isomorphous with zeolite beta and comprised of Si, Ti, and Al. The molecular sieve is modified by substituting the aluminum-associated cationic sites with ammonium, alkali metal, or alkaline earth cations instead of protons.

    摘要翻译: 在具有与沸石β同晶但由Si,Ti和Al组成的骨架结构的改性含钛分子筛存在下,烯烃被过氧化氢环氧化。 通过用铵,碱金属或碱土金属阳离子代替铝相关的阳离子位点代替质子来修饰分子筛。

    Activation of as-synthesized titanium-containing zeolites
    4.
    发明授权
    Activation of as-synthesized titanium-containing zeolites 失效
    合成的含钛沸石的活化

    公开(公告)号:US5681789A

    公开(公告)日:1997-10-28

    申请号:US599830

    申请日:1996-02-12

    IPC分类号: B01J29/89 B01J29/04

    CPC分类号: B01J29/89

    摘要: An as-synthesized zeolite having titanium substituted in its lattice framework and containing an organic template such as a quaternary ammonium salt may be activated for use as a catalyst by treating said as-synthesized zeolite with ozone. At least partial removal and/or reaction of the organic template is accomplished even at moderate temperatures, in contrast to conventional calcination techniques which require the use of significantly higher activation temperatures.

    摘要翻译: 通过用臭氧处理所述合成的沸石,可以将具有在其晶格框架中取代的钛并含有有机模板如季铵盐的合成的沸石活化用作催化剂。 即使在中等温度下也能实现有机模板的至少部分去除和/或反应,与需要使用显着更高活化温度的常规煅烧技术相反。

    Integrated process for epoxidation
    9.
    发明授权
    Integrated process for epoxidation 失效
    环氧化的综合工艺

    公开(公告)号:US5693834A

    公开(公告)日:1997-12-02

    申请号:US404657

    申请日:1995-03-15

    CPC分类号: C07D301/12 Y02P20/125

    摘要: Epoxides are produced by an integrated process involving molecular oxygen oxidation of a secondary alcohol, separation of the ketone co-product, and epoxidation of an olefin using the ketone-free oxidation product in the presence of a titanium silicalite catalyst and a methanol-containing diluent wherein methanol recovered from the epoxidation product mixture serves as a source of methanol in the epoxidation step.

    摘要翻译: 环氧化物通过在钛硅沸石催化剂和含甲醇的稀释剂存在下,使用无酮氧化产物,通过仲醇的分子氧氧化,酮共同产物的分离和烯烃的环氧化的综合方法生产 其中从环氧化产物混合物中回收的甲醇在环氧化步骤中用作甲醇源。

    Regeneration of a titanium-containing molecular sieve
    10.
    发明授权
    Regeneration of a titanium-containing molecular sieve 失效
    含钛分子筛的再生

    公开(公告)号:US5753576A

    公开(公告)日:1998-05-19

    申请号:US443948

    申请日:1995-05-18

    摘要: A titanium-containing molecular sieve which has been used as an oxidation catalyst is regenerated to provide a level of performance comparable to that of freshly prepared catalyst by heating at less than 400.degree. C. in the presence of molecular oxygen. The same batch of catalyst thus may be used over an extended period of time in a continuous epoxidation process by periodic practice of the aforedescribed reactivation method.

    摘要翻译: 已经用作氧化催化剂的含钛分子筛再生,以提供与新制备的催化剂相当的性能水平,通过在分子氧存在下在小于400℃下加热。 因此,通过上述重新激活方法的周期性实践,可以在连续环氧化方法中在较长时间内使用相同批次的催化剂。