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Process for producing alkylaromatic compounds

An aromatic compound, a technology that can alkylate aromatics, applied in the direction of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve problems such as no suggestions

Inactive Publication Date: 2011-09-07
BADGE LICENSING LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Again, there is no suggestion to use the transalkylation zone as a reactive guard bed and, although at least some fresh make-up benzene is sent to the transalkylation reaction zone, the entire effluent from the transalkylation zone goes directly to the alkyl within the area

Method used

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  • Process for producing alkylaromatic compounds
  • Process for producing alkylaromatic compounds
  • Process for producing alkylaromatic compounds

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Embodiment Construction

[0052] Described herein is a process for the preparation of monoalkylaromatic compounds by alkylating an alkylatable aromatic compound with an alkylating agent in the presence of an alkylation catalyst, followed by alkylation with an additional alkylating Alkylated Aromatics Any polyalkylated aromatics produced in the alkylation step are transalkylated to produce additional monoalkylated aromatic products. The transalkylation step is carried out in the presence of a separate transalkylation catalyst, and in the process of the present application, the fresh feed comprising the alkylatable aromatic compound is initially contacted with the transalkylation catalyst so that the latter not only uses to transalkylate the polyalkylated aromatics to produce additional monoalkylated aromatic products, and serve as a reactive guard bed to remove compounds such as reactive nitrogen compounds contained in the alkylated aromatics Impurities in aromatics feed. Since the transalkylation cata...

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Abstract

In a process for alkylation of an alkylatable aromatic compound to produce a monoalkylated aromatic compound, a first feed stream comprising fresh alkylatable aromatic compound is passed to a first reaction zone which comprises a transalkylation catalyst and which also receives a second feed stream comprising polyalkylated aromatic compounds. The first and second feed streams are contacted with the transalkylation catalyst in the first reaction zone under conditions to transalkylate the polyalkylated aromatic compounds with the alkylatable aromatic compound to produce the desired monoalkylated aromatic compound.; A first effluent stream comprising unreacted alkylatable aromatic compound and the monoalkylated aromatic compound is removed from the first reaction zone and passed to a fractionation system to separate the first effluent stream into a first light fraction comprising the unreacted alkylatable aromatic compound and a first heavy fraction comprising the monoalkylated aromatic compound. At least part of one or more impurities in the fresh feed stream are removed in the first reaction zone.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from U.S. Provisional Application Serial No. 61 / 104,447, filed October 10, 2008, and European Patent Application No. EP09150689.9, filed January 16, 2009, the entire contents of which are incorporated by reference . technical field [0003] This invention relates to a process for the preparation of alkylaromatics, especially ethylbenzene and cumene. Background technique [0004] Ethylbenzene is a key raw material in the production of styrene and is produced by the reaction of ethylene and benzene in the presence of an acid catalyst. Likewise, cumene is an important precursor in the production of phenol and the alkylation of benzene with propylene in the presence of an acid catalyst. [0005] Traditionally, ethylbenzene has been produced in a gas phase reactor system in which the ethylation of benzene with ethylene is carried out in fixed beds of zeolite catalysts at temperatures of ab...

Claims

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Application Information

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IPC IPC(8): C07C2/66C07C6/12C07C15/073C07C15/085
Inventor M·J·文森特M·C·史密斯
Owner BADGE LICENSING LLC
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