Critical Phase Alkylation Process
    111.
    发明申请
    Critical Phase Alkylation Process 审中-公开
    临界相烷基化工艺

    公开(公告)号:US20080058567A1

    公开(公告)日:2008-03-06

    申请号:US11851896

    申请日:2007-09-07

    IPC分类号: C07C15/073 C07C2/66

    摘要: A process for the production of ethylbenzene by the ethylation of benzene in the critical phase over a molecular sieve aromatic alkylation catalyst. An aromatic feedstock having a benzene content of at least 90 wt. % is supplied into a reaction zone into contact with a zeolite beta alkylation catalyst having a silica/alumina ratio within the range of 20-500, specifically 50-150. The alkylation catalyst is a zeolite beta specifically a lanthanum-modified zeolite beta. Ethylene is supplied to the reaction zone to provide a benzene/ethylene mole ratio of 1-15. The reaction zone is operated under conditions in which benzene is in the supercritical phase to produce an alkylation product containing ethylbenzene as a primary product with heavier alkylated by-products of no more than 60 wt. % of the ethylbenzene. The alkylation product is recovered from the reaction zone and supplied to a separation and recovery zone to separate ethylbenzene from a polyalkylated component including diethylbenzene. At least a portion of the polyalkylated component is supplied to a transalkylation reaction zone containing a molecular sieve transalkylation catalyst. The transalkylation reaction zone contains a zeolite Y catalyst and is operated under liquid phase conditions.

    摘要翻译: 通过在分子筛芳族烷基化催化剂上的临界相中苯的乙基化生产乙苯的方法。 苯含量至少为90wt。%的芳族原料。 将%加入到与二氧化硅/氧化铝比在20-500,特别是50-150范围内的沸石β烷基化催化剂接触的反应区中。 烷基化催化剂是沸石β特别是镧改性沸石β。 将乙烯供应至反应区以提供1-15的苯/乙烯摩尔比。 反应区在苯处于超临界阶段的条件下运行,以产生含有乙苯作为主要产物的烷基化产物,其中较重的烷基化副产物不超过60wt。 %的乙苯。 将烷基化产物从反应区回收并供给到分离和回收区,以从包含二乙基苯的多烷基化组分分离乙苯。 将至少一部分多烷基化组分供应到含有分子筛烷基转移催化剂的烷基转移反应区。 烷基转移反应区含有沸石Y催化剂,并在液相条件下运行。

    Method for preparing ethylbenzene from 4-vinylcyclohexene
    113.
    发明授权
    Method for preparing ethylbenzene from 4-vinylcyclohexene 失效
    从4-乙烯基环己烯制备乙苯的方法

    公开(公告)号:US6130362A

    公开(公告)日:2000-10-10

    申请号:US776459

    申请日:1997-01-14

    摘要: In the presence of a heterogeneous catalyst made of palladium supported on active carbon, ethylbenzene is prepared from 4-vinylcyclohexene through catalytic transfer hydrogenation in a hydrogen donor solvent with an oxidizing agent. Reaction temperature ranges from 50 to 110.degree. C. The hydrogen donor solvent is selected from the group consisting of alcohol, water, and a mixture of these. The oxidizing agent is selected from monovalent or divalent nitro compounds, water, hydrogen peroxide, NaOCl, NaClO.sub.2, NaClO.sub.3, NaClO.sub.4, oxygen and air, and used in the amount of 0.02 to 3 moles per mole of 4-vinylcyclohexene.

    摘要翻译: PCT No.PCT / KR96 / 00076 Sec。 371日期1997年1月14日 102(e)日期1997年1月14日PCT提交1996年5月25日PCT公布。 WO96 / 37449 PCT公开号 日期1996年11月28日在由负载在活性炭上的钯制成的非均相催化剂的存在下,通过在供氢溶剂中的氧化剂的催化转移氢化由4-乙烯基环己烯制备乙苯。 反应温度范围为50至110℃。供氢溶剂选自醇,水及其混合物。 氧化剂选自单价或二价硝基化合物,水,过氧化氢,NaOCl,NaClO 2,NaClO 3,NaClO 4,氧气和空气,其用量为每摩尔4-乙烯基环己烯0.02至3摩尔。

    Gas phase alkylation with split load of catalyst
    115.
    发明授权
    Gas phase alkylation with split load of catalyst 失效
    气相烷基化,分体负载催化剂

    公开(公告)号:US6057485A

    公开(公告)日:2000-05-02

    申请号:US193310

    申请日:1998-11-17

    摘要: Ethylbenzene is produced by alkylation over a split load of monoclinic silicalite alkylation catalysts having different silica/alumina ratios. A feedstock containing benzene and ethylene is applied to a multi-stage alkylation reaction zone having a plurality of series-connected catalyst beds. At least one catalyst bed contains a first monoclinic silicalite catalyst having a silica/alumina ratio of at least 275. At least one other catalyst bed contains a second monoclinic silicalite catalyst having a silica/alumina ratio of less than about 275. The alkylation reaction zone is operated at temperature and pressure conditions in which the benzene is in a gaseous phase to cause gas-phase alkylation of the aromatic substrate in the presence of the monoclinic silicalite catalysts to produce an alkylation product. The alkylation product is then withdrawn from the reaction zone for separation and recovery. The use of the split load of catalyst allows a higher purity ethylbenzene product to be produced at improved efficiencies than if only one of the catalysts were used by itself.

    摘要翻译: 通过在具有不同二氧化硅/氧化铝比的单斜晶硅沸石烷基化催化剂的分裂负载下烷基化来制备乙苯。 将含有苯和乙烯的原料施加到具有多个串联催化剂床的多级烷基化反应区。 至少一个催化剂床含有二氧化硅/氧化铝比至少为275的第一单斜晶硅沸石催化剂。至少一个其它催化剂床含有二氧化硅/氧化铝比小于约275的第二单斜硅沸石催化剂。烷基化反应区 在其中苯处于气相的温度和压力条件下操作,以在单斜硅沸石催化剂的存在下引起芳族底物的气相烷基化以产生烷基化产物。 然后将烷基化产物从反应区取出以进行分离和回收。 与仅使用一种催化剂本身一起使用的催化剂的分离负载的使用允许以提高的效率生产更高纯度的乙苯产物。

    Mixed phase ethylation process for producing ethylbenzene
    116.
    发明授权
    Mixed phase ethylation process for producing ethylbenzene 失效
    用于生产乙苯的混合乙基化方法

    公开(公告)号:US5977423A

    公开(公告)日:1999-11-02

    申请号:US175643

    申请日:1998-10-20

    申请人: David Netzer

    发明人: David Netzer

    摘要: An ethylbenzene production method is applied using a mixed phase ethylation of dilute ethylene with impure benzene. The benzene feed contains over 75% by weight benzene, with the balance being non-aromatic C.sub.6 to C.sub.7 hydrocarbons, including cyclohexane. The production method involves separating the benzene vapor from the hydrogen/methane rich vent gas by condensing the benzene at a temperature below about 5.5.degree. C., the normal freezing point of benzene.

    摘要翻译: 使用稀乙烯与不纯的苯的混合乙基化来应用乙苯生产方法。 苯原料含有超过75%(重量)的苯,其余为非芳族C6-C7烃,包括环己烷。 生产方法包括通过在低于约5.5℃,苯的正常凝固点的温度下冷凝苯来分离富含氢/甲烷的排出气体中的苯蒸气。

    Process of producing ethylbenzene using alkylation and transalkylation
with propylbenzene destruction
    117.
    发明授权
    Process of producing ethylbenzene using alkylation and transalkylation with propylbenzene destruction 失效
    使用烷基化和烷基转移用丙苯破坏生产乙苯的方法

    公开(公告)号:US5962758A

    公开(公告)日:1999-10-05

    申请号:US57918

    申请日:1998-04-09

    CPC分类号: C07C15/073 C07C2/64

    摘要: Ethylbenzene is produced from benzene and ethylene in an alkylation reactor wherein the feedstocks also contain propylbenzenes and/or components that produce propylbenzene. Polyethylbenzenes are also produced in the process. The ethylbenzene product and unreacted benzene are separated and then the propylbenzenes are separated from the polyethylbenzenes by distillation. The propylbenzenes are destroyed in a vapor-phase reactor and the polyethylbenzenes are transalkylated with benzene in a liquid or partial liquid phase at a lower temperature.

    摘要翻译: 乙苯在烷基化反应器中由苯和乙烯生产,其中原料还含有丙苯和/或产生丙苯的组分。 在该过程中也产生聚乙基苯。 分离乙苯产物和未反应的苯,然后通过蒸馏将丙基苯与聚乙基苯分离。 丙基苯在气相反应器中被破坏,聚乙烯苯在较低温度下在液体或部分液相中与苯进行烷基转移。

    Aromatic alkylation process
    118.
    发明授权
    Aromatic alkylation process 失效
    芳香烷基化工艺

    公开(公告)号:US5907073A

    公开(公告)日:1999-05-25

    申请号:US30285

    申请日:1998-02-24

    申请人: Ashim Kumar Ghosh

    发明人: Ashim Kumar Ghosh

    摘要: A process for the alkylation of an aromatic substrate over a molecular sieve zeolite catalyst involving supplying an aromatic substrate to a reaction zone containing the catalyst. The molecular sieve catalyst is an effective aromatic alkylation catalyst and comprises a modified zeolite beta alkylation catalyst having an intergrowth of a ZSM-12 crystalline framework within the crystalline framework of zeolite beta. An alkylating agent is also supplied to the reaction zone which is operated under temperature and pressure conditions effective to cause alkylation of the aromatic substrate by the alkylating agent. An alkylated substrate is recovered from the reaction zone.

    摘要翻译: 一种用于在分子筛沸石催化剂上烷基化芳族底物的方法,包括将芳族底物供应到含有催化剂的反应区。 分子筛催化剂是有效的芳族烷基化催化剂,并且包含在沸石β的晶体骨架内具有ZSM-12晶体骨架的共生体的改性沸石β烷基化催化剂。 烷基化剂也被供给到在有效使烷基化剂引起芳族底物烷基化的温度和压力条件下运行的反应区。 从反应区回收烷基化底物。