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Toluene selective disproportion and toluene and C9 and its above aromatic disproportion and alkyl transfusion method

A technology for alkylation transfer and aromatics disproportionation, which is applied in the field of p-xylene separation technology, can solve the problems of demanding reaction raw materials, high energy consumption, and low concentration, and achieve the effects of reducing scale, good technical effects, and increasing concentration

Inactive Publication Date: 2003-04-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the shortcomings of low concentration of p-xylene in mixed xylene, high energy consumption or harsh requirements for reaction raw materials in the production of p-xylene in the previous literature, and to provide a new toluene selection Sexual disproportionation and disproportionation and transalkylation of toluene with carbon nine and above aromatics

Method used

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  • Toluene selective disproportion and toluene and C9 and its above aromatic disproportion and alkyl transfusion method
  • Toluene selective disproportion and toluene and C9 and its above aromatic disproportion and alkyl transfusion method
  • Toluene selective disproportion and toluene and C9 and its above aromatic disproportion and alkyl transfusion method

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Embodiment 3

[0038] Still adopt aforementioned technology of the present invention (comprising aromatics fractionation unit in the selective disproportionation unit) and feedstock flow rate shown in table 1 as benchmark, the pure toluene of purchasing 53000 kg / h enters the selective disproportionation unit, re-examine the technology of the present invention Ability to produce pX. See Table 9 for the feed and output of the selective disproportionation unit, disproportionation and transalkylation unit, and isomerization unit; see Table 10 for the processing scale of each unit in the aromatics complex; and see Table 10 for the production of p-xylene and benzene Table 11.

[0039] components

[0040]

[0041] product

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Abstract

The toluene is selectively disproportionated to obtain the mixed xylene containing high-concentration p-xylene. Then the C9 and C9+x arylhydrocarbon and toluene take part in disproportionation and alkyl transfer reaction to prepare benzene and thermodynamically balanced mixed xylene. The advantages are less circulation of arylhydrocarbon, low energy consumption, and low requirement to raw materials.

Description

technical field [0001] The present invention relates to the selective disproportionation of toluene and the disproportionation and alkylation method of toluene and carbon nine and above aromatics, especially about the selective disproportionation of toluene and toluene and carbon nine and above aromatics (C 9 + A) disproportionation and transalkylation reaction, and then through carbon eight aromatics (C 8 A) Isomerization technology and p-xylene separation technology, the method of producing p-xylene (PX). Background technique [0002] P-xylene is one of the main basic organic raw materials in the petrochemical industry. It is widely used in many chemical production fields such as chemical fibers, synthetic resins, pesticides, medicines, and plastics. Traditional p-xylene production methods such as figure 1 As shown, the thermodynamic equilibrium xylene containing ethylbenzene generated by catalytic reforming of naphtha is C8 aromatics (C ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/26B01J29/44C07B61/00C07C6/12C07C7/12C07C7/14C07C15/08
CPCC07C6/126C07C2529/48C07C15/04C07C2529/26C07C15/08C07C2529/44C07C6/123C07C2529/78Y02P20/52C07C6/12
Inventor 谢在库杨卫胜孔德金朱冬茂
Owner CHINA PETROLEUM & CHEM CORP
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