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Catalyst for alkylation of toluene methanol

A catalyst and alkylation technology, applied in physical/chemical process catalysts, molecular sieve catalysts, organic chemistry, etc., can solve the problems of low activity and para-selectivity, and achieve the effect of improving activity and good technical effects

Active Publication Date: 2007-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the activity and para-selectivity of toluene methanol benzene cycloalkylation catalysts in previous literatures are relatively low, and a new catalyst for toluene methanol alkylation is provided

Method used

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Embodiment 1

[0013] Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 The molar ratio is 75.0 grams of ammonium type ZSM-5 molecular sieve powder of 50,550 ℃ of ignition loss 10%, add 42.2 grams of silica sol (SiO 2 Weight percent content 40%) analytically pure lanthanum nitrate [La(NO 3 ) 3 ·nH 2 O] impregnated with the same amount of solution, dried and roasted. The obtained weight ratio is: La / hydrogen ZSM-5 molecular sieve / SiO 2 Catalyst A = 15 / 80 / 20.

Embodiment 2

[0015] Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 Molar ratio is 60, the ammonium type ZSM-5 molecular sieve powder 75.0 grams of loss on ignition 10%, with Na 2 Pseudo-boehmite (α-Al) with an O content of less than 0.15% (weight) and a loss on ignition of 30% at 550°C 2 o 3 ·H 2 O) 24.1 grams are fully mixed, kneaded and extruded into strips, dried and then roasted and pelletized, with analytically pure cerous nitrate [Ce(NO 3 ) 3 ·6H 2 O] solution impregnation, drying, roasting, with analytically pure magnesium acetate [Mg(CH 3 COO) 2 4H 2 O] solution impregnation, drying and roasting. Catalyst B with a weight ratio of: Ce / Mg / hydrogen ZSM-5 molecular sieve / alumina=2 / 6 / 80 / 20 was obtained.

Embodiment 3

[0017] Na 2 O content less than 0.1% (weight), SiO 2 / Al 2 o 3 Molar ratio is 80, 75.0 grams of ammonium type ZSM-5 molecular sieve powders of loss on ignition 10%, add 64.3 grams of pseudo-boehmite (α-Al 2 o 3 ·H 2 O), fully mixed evenly, kneaded and extruded to shape, roasted and pelletized after drying, first use analytically pure lanthanum nitrate [La(NO 3 ) 3 ·nH 2 O] solution equal amount impregnation, drying, roasting, and magnesium acetate [Mg(CH 3 COO) 2 4H 2 O] solution equal amount of impregnation, drying, roasting, finally with calcium nitrate [Ca(NO 3 ) 2 4H 2 O] impregnated with the same amount of solution, dried and roasted. The obtained weight ratio is: La / Mg / Ca / hydrogen ZSM-5 molecular sieve / Al 2 o 3 Catalyst C = 20 / 6 / 2 / 60 / 40.

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Abstract

A catalyst for alkylating the phenyl ring of toluene or methol to prepare xylene with high conversion rate and selectivity features that the RE metal is carried by hydrogen-type ZSM-5 main body.

Description

technical field [0001] The invention relates to a catalyst for the alkylation of toluene methanol, in particular to a catalyst for the alkylation of toluene methanol and benzene ring. Background technique [0002] Toluene-methanol benzene ring methylation reaction can convert toluene into xylene with higher application value. The xylene product is an equilibrium composition mixture of its three isomers, and the most demanded p-xylene only accounts for about 24%. Therefore, a new process for the selective methylation of benzene rings with toluene and methanol has been proposed, so that the reaction system can selectively generate p-xylene. Since ZSM-5 was synthesized in the early 1970s, it has been widely valued due to its unique catalytic performance for reactions such as alkylation, isomerization, benzene ring methylation, selective cracking, and synthesis of gasoline from methanol. ZSM-5 zeolite has a pore system composed of 10-membered oxygen ...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C1/20C07C2/86C07C15/08
CPCY02P20/52
Inventor 朱志荣谢在库陈庆龄邹薇祁晓岚
Owner CHINA PETROLEUM & CHEM CORP
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