High selectivity arene alkyl transfer and dealkylation xylol production increase reaction method

An aromatic alkyl, high-selectivity technology, applied in chemical instruments and methods, bulk chemical production, hydrocarbons, etc., can solve the problems of low selectivity and low conversion, and achieve high selectivity and ethylbenzene content. The effect of low, good technical effects

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that in the prior art, the conversion rate of carbon nine and above heavy aromatics is low, and the ethylbenzene by-product content in the reaction product is high, resulting in low selectivity of xylene target product in the mixed carbon eight product, and the There is no selectivity problem in the dealkylation of aromatic hydrocarbon side chain alkyl groups, providing a new high-selectivity aromatic hydrocarbon transalkylation and dealkylation reaction method to increase the production of xylene

Method used

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  • High selectivity arene alkyl transfer and dealkylation xylol production increase reaction method
  • High selectivity arene alkyl transfer and dealkylation xylol production increase reaction method
  • High selectivity arene alkyl transfer and dealkylation xylol production increase reaction method

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Effect test

Embodiment 1

[0028] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 25 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 46 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 41 grams evenly, and then impregnate with ammonium molybdate into an aqueous solution; add dilute nitric acid solution of bismuth nitrate, magnesium nitrate, nickel nitrate, palladium chloride, and cerium nitrate to the impregnated powder, knead fully and evenly, and carry out extrusion molding , Calcined at 500°C to make catalyst A.

Embodiment 2

[0030] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 38 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 24 grams of ammonium β zeolite 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 36 grams evenly, and then make an aqueous solution with ammonium molybdate for impregnation; add a certain amount of dilute nitric acid solution, bismuth nitrate, iron nitrate and lanthanum nitrate to the impregnated powder, knead fully and evenly, carry out extrusion molding, and bake at 500 ° C into catalyst B.

Embodiment 3

[0032] 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 11 grams of Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 63 grams of ammonium zeolite beta 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 35 grams evenly, then add a certain amount of dilute nitric acid solution, cobalt acetate, tetraammonium platinum chloride, stannous chloride, titanium tetrachloride, nickel nitrate and lanthanum nitrate, fully knead evenly, carry out extrusion molding, 500 ℃ Calcined to make catalyst C.

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Abstract

The invention relates to a reaction method for transferring high selectivity alkyl aromatic hydrocarbon and increasing the yield of xylene through dealkylation. The invention mainly solves the problems that the reaction product has high content of by-product of phenylethane, thereby causing that the xylene of compound C6 product has low selectivity, and has no selection to the dealkylation of lateral chain alkyl aromatic hydrocarbon in the prior art. The invention has the technical proposal that the catalyst is made of 40 to 90 proportions of hydrogen zeolite with the SiO2AL2O3 mole ratio of 12 to 70, 10 to 60 proportions of adhesive agent, oxide which is selected from at least one of molybdenum, palladium or nickel, zeolite which is selected from at least one of iron, bismuth, stannum ormolybdenum and oxide which is selected from at least one of lanthanum, cerium, magnesium or titanuium; the xylene product is generated through a catalytic reaction at the weight space velocity of 1.0to 3.5 hours<-1>, the reaction temperature of 350 to 460 DEG C, the reaction pressure of 1.5 to 3.5 MPa and the hydrogen-hydrocarbon molecule rate of 2.0 to 8.0. The invention preferably solves the technical problems mentioned above, and the invention can be applied to the industrial production of transferring C9 and more than C9 heavy aromatic hydrocarbon and toluol alkyl and the dealkylation reaction.

Description

technical field [0001] The present invention relates to a kind of highly selective aromatics transalkylation and dealkylation reaction method for increasing the production of xylene, especially about the ability to use carbon nine and above heavy aromatics and toluene as raw materials or separately use carbon nine and above heavy aromatics As a raw material, through alkylation transfer and dealkylation reaction, it is a reaction method to increase the conversion rate of heavy aromatics of carbon nine and above, reduce side reactions and ethylbenzene byproduct content in the product, so as to increase the production of xylene products. 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 carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/18C07C15/08B01J29/80
CPCY02P20/52
Inventor 谢在库朱志荣祁晓岚孔德金左煜陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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