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Processes and apparatuses for toluene methylation in an aromatics complex

An aromatic compound, aromatic technology, applied in the direction of hydrocarbons, hydrocarbons, chemical instruments and methods, etc.

Active Publication Date: 2018-08-21
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also cases where paraxylene producers prefer to limit the production of benzene as a by-product or the production of paraxylene by making adjustments

Method used

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  • Processes and apparatuses for toluene methylation in an aromatics complex
  • Processes and apparatuses for toluene methylation in an aromatics complex
  • Processes and apparatuses for toluene methylation in an aromatics complex

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Embodiment Construction

[0026] The following description is not made in a limiting sense, but merely for the purpose of describing general principles of illustrative aspects. The scope of the present invention should be determined with reference to the claims.

[0027] The feed stream to the process generally comprises the general formula C 6 h (6-n) R n wherein n is an integer from 0 to 5 and each R can be CH in any combination 3 、C 2 h 5 、C 3 h 7 or C 4 h 9. The aromatics-rich feed stream to the process can be derived from a variety of sources including, but not limited to, catalytic reforming of naphtha, distillates or other hydrocarbons, steam thermal cracking to produce light olefins and heavier aromatic-rich by-products (including gasoline-range materials, commonly referred to as "pygas"), and catalytic or thermal cracking of distillates and heavy oils to produce gasoline-range pygas product. Products from thermal cracking or other cracking operations will generally be hydrogenated ...

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Abstract

This present disclosure relates to processes and apparatuses for toluene methylation in an aromatics complex for producing paraxylene. More specifically, the present disclosure relates to processes and apparatuses wherein a toluene methylation zone is integrated within an aromatics complex for producing paraxylene thus allowing no benzene byproduct to be produced. This may be accomplished by incorporating a toluene methylation process into the aromatics complex and recycling the benzene to the transalkylation unit the aromatics complex.

Description

[0001] priority statement [0002] This application claims priority to US Application Serial No. 62 / 267,966, filed December 16, 2015, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] The present disclosure relates to methods and apparatus for the methylation of toluene in an aromatics complex to produce para-xylene. More specifically, the present disclosure relates to methods and apparatus for the methylation of toluene in an aromatic compounding plant to produce para-xylene without the production of benzene by-products. Background technique [0004] Xylene isomers are produced in large quantities from petroleum and are used as feedstocks for a variety of important industrial chemicals. The most important xylene isomer is p-xylene, the main raw material for polyester, which continues to enjoy high growth rates due to large base demand. Ortho-xylene is used to produce phthalic anhydride, which provides a high-volume and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/86C07C15/08C07C15/06C07C4/18C07C15/04C07C5/22C07C6/12C07C15/073C07C5/29
CPCC07C2/864C07C5/222C07C6/126C07C7/08C07C7/12C10G29/205C10G69/123C10G2400/30C07C15/06C07C15/08C07C15/04C07C4/18C07C5/2737C07C5/277
Inventor D·S·克里姆斯基R·B·拉尔森
Owner UOP LLC