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Highly selective aromatics alkyl transferring and dealkylation catalyst

A kind of aromatic hydrocarbon alkyl, selective technology, applied in molecular sieve catalyst, physical/chemical process catalyst, organic chemistry and other directions, can solve the problem of low selectivity, and achieve the effect of high selectivity and good technical effect

Active Publication Date: 2009-10-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The technical problem to be solved by the present invention is that the high content of ethylbenzene by-products in the reaction products in the prior art results in low selectivity of xylene target products in mixed C8 products, and no selectivity to the dealkylation of aromatic hydrocarbon side chain alkyl groups The problem of providing a new highly selective catalyst for the transalkylation and dealkylation of aromatic hydrocarbons

Method used

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  • Highly selective aromatics alkyl transferring and dealkylation catalyst
  • Highly selective aromatics alkyl transferring and dealkylation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 22 grams of ammonium mordenite with a molecular ratio of 23 and Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 45 grams of ammonium zeolite beta with a molecular ratio of 24 and Na 2 Al with an O content of less than 0.1% by weight 2 o 3 Mix 42 grams evenly, and then make an aqueous solution with ammonium molybdate for impregnation; add dilute nitric acid solution of bismuth nitrate, magnesium nitrate, and cerium nitrate to the impregnated powder, knead fully and evenly, carry out extrusion molding, and roast at 500°C to make a catalyst a.

Embodiment 2

[0033] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 36 grams of ammonium mordenite with a molecular ratio of 22 and Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 25 grams of ammonium zeolite beta with a molecular ratio of 25 and Na 2 Al with an O content of less than 0.1% by weight 2 o 3 Mix 35 grams evenly, and then use ammonium molybdate to prepare an aqueous solution for impregnation; add a certain amount of dilute nitric acid solution, bismuth nitrate, nickel nitrate, lanthanum nitrate, iron nitrate and palladium chloride to the impregnated powder, knead fully and evenly, and carry out extrusion Bar forming, 500 ℃ calcined to make catalyst B.

Embodiment 3

[0035] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 Ammonium mordenite with a molecular ratio of 22 and 12 grams of Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 62 grams of ammonium β zeolite with a molecular ratio of 30 and Na 2 Al with an O content of less than 0.1% by weight 2 o 3 Mix 38 grams evenly, then add a certain amount of dilute nitric acid solution, cobalt acetate, tetraammonium platinum chloride, stannous chloride, nickel nitrate and lanthanum nitrate, fully knead evenly, carry out extrusion molding, and roast at 500°C to make catalyst C .

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Abstract

The invention relates to a highly selective aromatic hydrocarbon alkylation and dealkylation reaction catalyst, which mainly solves the problem that the high content of ethylbenzene by-products in the reaction product in the prior art causes the selectivity of the xylene target product in the mixed C8 product to be relatively low. Low, there is no selectivity problem for the dealkylation of aromatic side chain alkyl groups. The present invention adopts 40 to 90 parts of zeolite comprising SiO2 / Al2O3 molar ratio of 12 to 70 in parts by weight, 10 to 60 parts of binder, at least one oxide selected from molybdenum, palladium or nickel, The technical proposal that the catalyst is composed of at least one oxide selected from iron, bismuth, tin or platinum, lanthanum and at least one oxide selected from cerium, magnesium or titanium can better solve this problem. The catalyst can be used in the industrial production of carbon nine and above heavy aromatics and toluene for transalkylation and dealkylation reaction to increase the production of xylene products.

Description

technical field [0001] The present invention relates to a highly selective catalyst for the transalkylation and dealkylation of aromatic hydrocarbons, in particular to the ability to use carbon nine and above heavy aromatics and toluene as raw materials or to use carbon nine and above heavy aromatics as raw materials alone , through the transalkylation and dealkylation reaction, reduce the side reaction and the content of ethylbenzene by-product in the product, so as to increase the production of xylene product reaction catalyst. Background technique [0002] Para-xylene in xylene is one of the main basic organic raw materials in the petrochemical industry. It is widely used in chemical fiber, synthetic resin, pesticide, medicine, plastic and many other chemical production fields. In order to increase xylene production, use toluene disproportionation or toluene and carbon nine and above heavy aromatics (C 9 + A) disproportionation and transalkylation reaction to generate b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/076B01J29/064B01J29/26B01J29/48C07C15/08C07C4/12
CPCY02P20/52
Inventor 朱志荣谢在库孔德金祁晓岚王仰东陈庆龄
Owner CHINA PETROLEUM & CHEM CORP