Catalyst for preparing arene via direct methanol conversion and preparation method thereof

A catalyst and direct technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low stability and fast carbon deposition of catalysts, and achieve the effect of improving stability and enhancing carbon capacity.

Inactive Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the problem of fast carbon deposition and low stability of the catalyst in the process of direct conversion of methanol to aromatics, and a new catalyst for direct conversion of methanol to aromatics is provided

Method used

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  • Catalyst for preparing arene via direct methanol conversion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a) Take 100g silicon aluminum ratio SiO 2 / Al 2 o 3 Add 20 ZSM-5 molecular sieve raw powder to 600g of 1.5mol / L sodium hydroxide solution, stir at 30°C for 30min, filter and wash with water, and then dry the filter cake at 100°C for 8h.

[0020] b) Take 80 g of molecular sieves dried in step a), mix them with 400 g of 5% ammonium nitrate solution, heat at 80°C for 2h, filter and wash with water, then dry the filter cake at 100°C for 8h, and roast at 500°C for 4h to obtain type H ZSM-5 molecular sieve.

[0021] c) Take 20g of the HZSM-5 molecular sieve prepared in the step b), and mix it with 58g of pseudo-boehmite and 2.0g of turmeric powder. Dilute nitric acid was added to the mixture, kneaded evenly, extruded, dried at 110°C for 12 hours, and calcined at 600°C for 6 hours to prepare a catalyst carrier.

[0022] d) Dissolve 2.7g of zinc nitrate in 15g of water, add 20g of the catalyst carrier prepared in step c), dry at 110°C for 12h, and roast at 600°C for 4h to p...

Embodiment 2

[0024] a) Take 100g silicon aluminum ratio SiO 2 / Al 2 o 3 Add 200 ZSM-5 molecular sieve raw powder to 600 g of 0.1 mol / L potassium hydroxide solution, stir at 80 °C for 240 min, filter and wash with water, and then dry the filter cake at 100 °C for 10 h.

[0025] b) Take 80 g of molecular sieves dried in step a), mix them with 400 g of 5% ammonium nitrate solution, heat at 80°C for 2h, filter and wash with water, then dry the filter cake at 120°C for 8h, and roast at 550°C for 4h to obtain type H ZSM-5 molecular sieve.

[0026] c) Take 20g of HZSM-5 molecular sieve prepared in step b), 30g of pseudo-boehmite, and 1.0g of starch and mix them evenly. Dilute nitric acid was added to the mixture, kneaded evenly, extruded, dried at 100°C for 12 hours, and calcined at 580°C for 5 hours to prepare a catalyst carrier.

[0027] d) Dissolve 1.0 g of zinc sulfate in 28 g of water, add 40 g of the catalyst carrier prepared in step c), dry at 120°C for 8 hours, and roast at 600°C for ...

Embodiment 3

[0029] a) Take 100g silicon aluminum ratio SiO 2 / Al 2 o 3 Add 100 ZSM-5 molecular sieve raw powder to 500 g of potassium hydroxide solution with a concentration of 0.5 mol / L, stir at 80 °C for 120 min, filter and wash with water, and then dry the filter cake at 120 °C for 2 h.

[0030] b) Take 80 g of molecular sieves dried in step a), mix them with 400 g of 5% ammonium nitrate solution, heat at 80°C for 2h, filter and wash with water, then dry the filter cake at 100°C for 16h, and roast at 580°C for 3h to obtain type H ZSM-5 molecular sieve.

[0031] c) Take 38g of the HZSM-5 molecular sieve prepared in step b), 10g of pseudo-boehmite, and 1.5g of celadon powder and mix them evenly. Dilute nitric acid was added to the mixture, kneaded evenly, extruded, dried at 100°C for 12 hours, and calcined at 550°C for 5 hours to prepare a catalyst carrier.

[0032] d) Dissolve 3.3g of zinc chloride in 20g of water, add 20g of the catalyst carrier prepared in step c), dry at 110°C fo...

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Abstract

The invention relates to a catalyst for preparing arene via direct methanol conversion and a preparation method thereof, and mainly solves the problems that the existing catalyst is fast in carbon deposition and low in stability during a reaction process. The catalyst provided by the invention comprises the following components according to parts by weight: a) 20 to 75 parts of binding agent; b) 20 to 75 parts of ZSM-5 molecular sieve; and c) 0.5 to 10 parts of zinc or oxides thereof, wherein the ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 20 to 200; the molecular sieve is firstly treated by using a base solution with the concentration of 0.1 to 2 mol/L before the catalyst is prepared; and the base solution is one of potassium hydroxide aqueous solution or sodium hydroxide aqueous solution. Therefore, according to the technical scheme of the catalyst and the preparation method thereof, the problems are solved well. As a result, the catalyst provided by the invention can be applied to the industrial production of arene via direct methanol conversion.

Description

technical field [0001] The invention relates to a catalyst for directly converting methanol to aromatics and a preparation method thereof. Background technique [0002] Aromatics, especially light aromatics BTX (benzene, toluene, xylene) are important organic chemical raw materials with high added value. At present, it is mainly produced by the platinum reforming process of naphtha. With the increasing shortage of oil resources and the continuous rise of international oil prices, the production capacity of aromatics is affected, and the price remains high. Therefore, new sources of raw materials and new alternative processes are sought To produce light aromatics has become an urgent problem to be solved. [0003] Compared with petroleum, my country's coal resources are relatively abundant. In recent years, the production of methanol using coal as raw material is developing towards large-scale and energy-saving development. The output of methanol continues to increase, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C07C15/04C07C15/06C07C15/08C07C1/20
CPCY02P20/52
Inventor 陈希强汪哲明肖景娴张铁柱
Owner CHINA PETROLEUM & CHEM CORP
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