中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

53 records (took 0.021 seconds)

    Process for Selectivating Catalyst for Producing Paraxylene by Methylation of Benzene and/or Toluene
    41.
    发明申请
    Process for Selectivating Catalyst for Producing Paraxylene by Methylation of Benzene and/or Toluene 审中-公开

    公开(公告)号：US20190330129A1

    公开(公告)日：2019-10-31

    申请号：US16271451

    申请日：2019-02-08

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Tan-Jen Chen

    IPC: C07C15/08 ,  B01J29/70 ,  C07C15/06 ,  C07C15/04 ,  C07C2/86 ,  B01J29/03

    Abstract: A process is described for producing paraxylene, in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index≤5, and the alkylation conditions comprise a temperature less than 500° C. The alkylation catalyst may be selectivated to produce a higher than equilibrium amount of paraxylene by using a molar ratio of alkylating agent to aromatic of at least 1:4.

    Cyclohexane dehydrogenation
    44.
    发明授权
    Cyclohexane dehydrogenation 有权
    环己烷脱氢

    公开(公告)号：US09321704B2

    公开(公告)日：2016-04-26

    申请号：US14438638

    申请日：2013-12-02

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： James R. Lattner ,  Christopher L. Becker ,  Tan-Jen Chen

    IPC: C07C45/00 ,  C07C37/80 ,  C07C2/74 ,  C07C5/367 ,  C07C5/31 ,  C07C13/28 ,  C07C15/04 ,  C07C37/58 ,  C07C45/28

    CPC classification number: C07C5/367 ,  C07C2/74 ,  C07C5/31 ,  C07C13/28 ,  C07C15/04 ,  C07C37/58 ,  C07C45/28 ,  C07C2601/14

    Abstract: A cyclohexane dehydrogenation process comprising a step of providing, as a benzene-containing stream, a vapor phase in equilibrium with a liquid phase at a condensation separation system; supplying benzene, hydrogen, and cyclohexane into a dehydrogenation reactor where at least part of the benzene supplied is from the benzene-containing stream. The use of a condensation separation system enables the control of the partial pressure of benzene in the material fed into the dehydrogenation reactor by controlling the temperature of the vapor phase, and hence the control of hydrogen to benzene molar ratio in the dehydrogenation reactor. The process results in a long life of the dehydrogenation catalyst due to reduced coking.

    Abstract translation: 环己烷脱氢方法包括在冷凝分离系统下提供与液相平衡的气相作为含苯物流的步骤; 将苯，氢和环己烷供应到脱氢反应器中，其中供应的至少一部分苯来自含苯物流。 通过使用冷凝分离系统，能够通过控制蒸发相的温度来控制进入脱氢反应器的材料中的苯分压，从而控制脱氢反应器中氢与苯的摩尔比。 该方法由于焦化减少导致脱氢催化剂的长寿命。

    Process for co-production of mixed xylenes and high octane C9+ aromatics
    48.
    发明授权
    Process for co-production of mixed xylenes and high octane C9+ aromatics 有权

    公开(公告)号：US11053176B2

    公开(公告)日：2021-07-06

    申请号：US16979751

    申请日：2019-03-15

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Tan-Jen Chen ,  Wenyih F. Lai ,  Anthony Go

    IPC: C07C2/00 ,  C07C2/86 ,  B01J29/18 ,  B01J29/70 ,  B01J35/10 ,  C07C5/27 ,  C10L1/06 ,  C10L10/10

    Abstract: Disclosed is a process for producing mixed xylenes and C9+ hydrocarbons in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating agent comprising methanol and/or dimethyl ether under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product stream comprising the mixed xylenes and C9+ hydrocarbons. The mixed xylenes are subsequently converted to para-xylene, and the C9+ hydrocarbons and its components may be supplied as motor fuels blending components. The alkylation catalyst comprises a molecular sieve having a Constraint Index in the range from greater than zero up to about 3. The molar ratio of aromatic hydrocarbon to alkylating agent is in the range of greater than 1:1 to less than 4:1.

Patent Agency Ranking