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Dealkylation and alkyl-transfering catalyst for C9 or more heavy aromatic hydrocarbons

A technology for heavy aromatics and transalkylation, which is applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, hydrocarbons, etc. It can solve the problems of low product yield, easy coking and deactivation of catalysts, etc., and achieve high conversion rate.

Active Publication Date: 2007-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that in the prior art, heavy aromatics with carbon nine and above are used as raw materials, the yield of the target product is low when preparing light aromatics, and the catalyst is easy to coke and deactivate. C9 and above heavy aromatics dealkylation and transalkylation catalyst

Method used

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  • Dealkylation and alkyl-transfering catalyst for C9 or more heavy aromatic hydrocarbons
  • Dealkylation and alkyl-transfering catalyst for C9 or more heavy aromatic hydrocarbons
  • Dealkylation and alkyl-transfering catalyst for C9 or more heavy aromatic hydrocarbons

Examples

Experimental program
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Effect test

Embodiment 1

[0025] use Na 2 O content less than 0.10% (weight), SiO 2 / Al 2 o 3 66.7 grams of ammonium mordenite powder with a molecular ratio of 25.2 and Na 2 α-Al with an O content of less than 0.10% by weight 2 o 3 ·H 2 57.1 grams of O were uniformly mixed, and then impregnated with an aqueous solution of palladium nitrate. Dilute the nitric acid solution after drying the impregnated powder, fully knead it evenly, carry out extruding and roasting to make Catalyst A.

Embodiment 2

[0027] use Na 2 O content less than 0.10% (weight), SiO 2 / Al 2 o 3 66.7 grams of ammonium mordenite powder with a molecular ratio of 25.2 and Na 2 α-Al with an O content of less than 0.10% by weight 2 o 3 ·H 2 57.1 grams of O were uniformly mixed, and then impregnated with an aqueous solution of palladium nitrate. The impregnated powder is added with zirconium oxychloride aqueous solution and dilute nitric acid solution, fully kneaded and uniform, extruded and calcined to obtain catalyst B.

Embodiment 3

[0029] use Na 2 O content less than 0.10% (weight), SiO 2 / Al 2 o 3 66.7 grams of ammonium mordenite powder with a molecular ratio of 60.5 and Na 2 α-Al with an O content of less than 0.10% by weight 2 o 3 ·H 2 O 57.1 grams were uniformly mixed, then added a certain amount of dilute nitric acid solution, palladium nitrate solution and lead nitrate solution, fully kneaded evenly, carried out extrusion molding, roasting to make catalyst C.

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Abstract

A dealkylation and transalkylation catalyst for increasing the output of heavy (C9 or more) arylhydrocarbon contains the hydrogen-type zeolite containing SiO2 / Al2O3 (20-90 Wt portions), adhesive (10-80) and palladium oxide (0.001-5).

Description

technical field [0001] The present invention relates to a catalyst for dealkylation and transalkylation of heavy aromatic hydrocarbons with carbon nine and above, in particular about using heavy aromatic hydrocarbons with carbon nine and above as raw materials, through the dealkylation process, firstly dealkylating the ethyl alcohol on the benzene ring The multi-carbon atom alkyl side chains such as radical and propyl group are removed, and the methyl group on the benzene ring is retained with high selectivity, and then the transalkylation process is carried out to maximize the conversion of heavy aromatics at carbon nine and above to Catalyst for Benzene, Toluene and Xylene (BTX). Background technique [0002] The p-xylene in the C8 aromatics is one of the main basic organic raw materials in the petrochemical industry, and it has a wide range of uses in many chemical production fields such as chemical fibers, synthetic resins, pesticides, med...

Claims

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Application Information

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IPC IPC(8): B01J29/06C07C4/00C07C6/00
CPCY02P20/52
Inventor 郭宏利杨德琴邹薇
Owner CHINA PETROLEUM & CHEM CORP
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