公开(公告)号：US5902917A

公开(公告)日：1999-05-11

申请号：US980108

申请日：1997-11-26

Applicant: Nick A. Collins ,  Dominick N. Mazzone ,  Chaya R. Venkat

Inventor： Nick A. Collins ,  Dominick N. Mazzone ,  Chaya R. Venkat

IPC: C07C6/12 ,  C07B61/00 ,  C07C2/64 ,  C07C15/073 ,  C07C15/085 ,  C07C1/00 ,  C07C2/68 ,  C07C5/22

CPC classification number: C07C15/073

Abstract: There is provided a process for producing alkylaromatics, especially ethylbenzene and cumene, wherein a feedstock is first fed to a transalkylation zone and the entire effluent from the transalkylation zone is then cascaded directly into an alkylation zone along with an olefin alkylating agent, especially ethylene or propylene.

Abstract translation: 提供了生产烷基芳族化合物，特别是乙苯和枯烯的方法，其中首先将原料进料到烷基转移区，然后将来自烷基转移区的整个流出物与烯烃烷基化试剂，特别是乙烯或其混合物直接级联到烷基化区 丙烯。

公开(公告)号：US06753452B2

公开(公告)日：2004-06-22

申请号：US10375784

申请日：2003-02-27

Applicant: Chaya R. Venkat ,  Yun-Yang Huang ,  Thomas Francis Degnan, Jr. ,  John P. McWilliams ,  Ronald A. Weiss

Inventor： Chaya R. Venkat ,  Yun-Yang Huang ,  Thomas Francis Degnan, Jr. ,  John P. McWilliams ,  Ronald A. Weiss

IPC: C07C266

CPC classification number: C07C15/02 ,  C07C7/13 ,  C07C2529/70 ,  C07C15/00

Abstract: A process is described for removing polar compounds from an aromatic feedstock which contains polar compounds. The process comprises contacting the feedstock in an adsorption zone at a temperature of less than or equal to 130° C. with an adsorbent selective for the adsorption of said polar compounds and comprising a molecular sieve having surface cavities with cross-sectional dimensions greater than 5.6 Angstroms. A treated feedstock substantially free of said polar compounds can then be fed to an alkylation zone for contact under liquid phase alkylation conditions with an alkylating agent in the presence of an alkylation catalyst.

Abstract translation: 描述了从含有极性化合物的芳族原料中除去极性化合物的方法。 该方法包括使原料在小于或等于130℃的吸附区中与选择性吸附所述极性化合物的吸附剂接触，并且包含具有横截面尺寸大于5.6的表面空腔的分子筛 埃 然后可以在烷基化催化剂存在下，将烷基化剂在液相烷基化条件下进料至基本不含所述极性化合物的处理过的原料。

公开(公告)号：US06313362B1

公开(公告)日：2001-11-06

申请号：US09213798

申请日：1998-12-17

Applicant: John R. Green ,  Thomas F. Degnan ,  Yun-Yang Huang ,  Chaya R. Venkat ,  Ronald A. Weiss

Inventor： John R. Green ,  Thomas F. Degnan ,  Yun-Yang Huang ,  Chaya R. Venkat ,  Ronald A. Weiss

IPC: C07C264

CPC classification number: C07C15/085 ,  C07C15/073

Abstract: Akylation product is contacted with a purification medium in a liquid phase pre-reaction step to remove impurities and form a purified stream. The purified stream may then be further processed by liquid phase transalkylation to convert the polyalkylated aromatic compound to a monoalkylated aromatic compound. The process may use a large pore molecular sieve catalyst such as MCM-22 as the purification medium in the pre-reaction step because of its high reactivity for alkylation, strong retention of catalyst poisons and low reactivity for oligomerization under the pre-reactor conditions. Olefins, diolefins, styrene, oxygenated organic compounds, sulfur containing compounds, nitrogen containing compounds and oligomeric compounds are removed.

Abstract translation: 将Akylation产物在液相预反应步骤中与净化介质接触以除去杂质并形成纯化的物流。 然后可以通过液相烷基转移进一步处理纯化的物流，以将多烷基化芳族化合物转化为单烷基化芳族化合物。 在预反应步骤中，该方法可以使用大孔分子筛催化剂例如MCM-22作为纯化介质，因为其在烷基化反应活性高，催化剂毒物强烈的保留和在反应器前条件下的低聚反应低。 除去烯烃，二烯烃，苯乙烯，含氧有机化合物，含硫化合物，含氮化合物和低聚物。

公开(公告)号：US5516956A

公开(公告)日：1996-05-14

申请号：US342322

申请日：1994-11-18

Applicant: Jeevan S. Abichandani ,  Chaya R. Venkat

Inventor： Jeevan S. Abichandani ,  Chaya R. Venkat

IPC: B01J29/04 ,  B01J29/44 ,  B01J29/65 ,  B01J29/70 ,  B01J31/02 ,  C07C4/18 ,  C07C5/27 ,  C07C15/00 ,  C07C15/067 ,  C07C15/08 ,  C07C5/22

CPC classification number: C07C15/08 ,  B01J29/44 ,  C07C15/00 ,  C07C15/067 ,  C07C4/18 ,  C07C5/2708 ,  B01J2229/12 ,  B01J2229/42 ,  B01J29/65 ,  B01J29/70 ,  C07C2529/06 ,  C07C2529/40 ,  C07C2529/65 ,  C07C2529/70 ,  Y02P20/52

Abstract: A mixture of aromatic hydrocarbons, comprising ethylbenzene and at least one xylene, is isomerized using a two component catalyst system to convert the ethylbenzene to compounds that may be removed from the aromatic hydrocarbon stream and to produce a product stream wherein the para-xylene concentration is approximately equal to the equilibrium ratio of the para-isomer. The first catalyst comprises an intermediate pore size zeolite that is effective for ethylbenzene conversion. The first catalyst is preferably silica-bound. The second catalyst comprises an intermediate pore size zeolite, which further has a small crystal size and which is effective to catalyze xylene isomerization. Each of the catalysts of this invention may contain one or more hydrogenation/dehydrogenation component.

Abstract translation: 使用双组分催化剂体系将包含乙苯和至少一种二甲苯的芳族烃混合物转化成可将乙苯转化成可从芳烃流中除去的化合物，并产生产物流，其中对二甲苯浓度为 大约等于对位异构体的平衡比。 第一种催化剂包括对乙苯转化有效的中等孔径的沸石。 第一催化剂优选是二氧化硅结合的。 第二种催化剂包括中等孔径的沸石，其进一步具有小的晶体尺寸并且有效催化二甲苯异构化。 本发明的每种催化剂可以含有一种或多种氢化/脱氢组分。