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Catalyst for aromatics alkyl transferring and dealkylation to synthesis benzene and xylene

A technology of xylene catalyst and aromatic hydrocarbon alkyl, which is applied in the direction of molecular sieve catalyst, physical/chemical process catalyst, organic chemistry, etc., can solve the problems of poor quality of benzene products, achieve high quality of benzene products, increase transalkylation and dealkylation Catalytic activity of base reaction, good technical effect

Active Publication Date: 2008-02-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the high content of non-aromatic by-products with a boiling point similar to benzene in the reaction product benzene product in the prior art causes problems such as poor quality of benzene products, and provides a new method for aromatic hydrocarbon transalkylation and dealkylation Synthesis of Benzene and Xylene Catalysts by Base Reaction

Method used

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  • Catalyst for aromatics alkyl transferring and dealkylation to synthesis benzene and xylene
  • Catalyst for aromatics alkyl transferring and dealkylation to synthesis benzene and xylene
  • Catalyst for aromatics alkyl transferring and dealkylation to synthesis benzene and xylene

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Embodiment 1

[0028] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 37 grams of ammonium type beta zeolite with a molecular ratio of 23 and Na 2 O content less than 0.10% (weight), SiO 2 / Al 2 o 3 26 grams of ammonium ZSM-5 zeolite with a molecular ratio of 72 and Na 2 Al with an O content of less than 0.1% by weight 2 o 3 Mix 40 grams evenly, and then impregnate with ammonium molybdate as an aqueous solution; then add a certain amount of dilute nitric acid solution, tetraammonium platinum chloride, stannous chloride and cerium nitrate solution, fully knead evenly, and carry out extrusion molding, 500 ℃ roasting to make catalyst A.

Embodiment 2

[0030] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 Ammonium ZSM-5 zeolite with a molecular ratio of 26 and 15 grams of Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 65 grams of ammonium zeolite beta with a molecular ratio of 31 and Na 2 Al with an O content of less than 0.1% by weight 2 o 3 34 grams were uniformly mixed, then a certain amount of dilute nitric acid solution, nickel nitrate and lanthanum nitrate were added, fully kneaded, extruded and calcined at 500°C to make Catalyst B.

Embodiment 3

[0032] Using Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 10 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 42 grams of ammonium β zeolite 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 40 grams evenly, and then impregnate with ammonium molybdate to form an aqueous solution; add dilute nitric acid solution of bismuth nitrate and cerium nitrate to the impregnated powder, fully knead evenly, carry out extrusion molding, and roast at 500°C to make catalyst C.

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Abstract

The present invention relates to a benzene and xylene catalyst, which is synthesized by aromatics transalkylation and dealkylation. The present invention mainly solves the problem in the prior art that a high by-product content in a benzene product of the reaction products causes bad quality of the benzene product. The present invention solves the problem well by a technical proposal that a catalyst consists of 40 to 130 portions of a mixture of a beta zeolite, SiO2 / Al2O3, Beta zeolite, the molar ratio of which is 10 to 100 and at least one zeolite which is selected from a mordenite, a Y zeolite, ZSM-12 or ZSM-5, 10 to 60 portions of binder, and 0.1 to 20 portions of at least one oxide of which is selected from molybdenum, palladium, fe, bismuth, cerium, lanthanum, nickel, tin or platinum, and all components are accounted by weight portions. The catalyst can be used for the technologies of a transfer of a heavy aromatic hydrocarbon of carbon-nine or above with toluene alkyl and the dealkylation and used for the industrial production of the xylene products.

Description

technical field [0001] The invention relates to a catalyst for the synthesis of benzene and xylene by transalkylation and dealkylation of aromatic hydrocarbons, in particular, it can use carbon nine and above heavy aromatics and toluene as raw materials or use carbon nine and above heavy aromatics as raw materials The raw material is a reaction catalyst for producing high-quality benzene products based on increased production of xylene products through transalkylation and dealkylation reactions. 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 recent years, due to the development of plastics, synthetic fibers and synthetic rubber industries, the demand for p-benzene and xylene has grown rapidly, and its market price is also higher than that of toluene and C 9 A is muc...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J29/068B01J29/06B01J29/076C07C15/08C07C6/12
CPCY02P20/52
Inventor 朱志荣谢在库祁晓岚孔德金杨为民陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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