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Catalyst for preparing aromatic hydrocarbons by methanol conversion and preparation method thereof

A methanol conversion and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low selectivity of target product aromatics and complex process routes

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problem that the process route process existing in the prior art is complex and the selectivity of the target product aromatics (especially BTX) is not high

Method used

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  • Catalyst for preparing aromatic hydrocarbons by methanol conversion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% La 2 o 3 , 5% Ga 2 o 3 , 55% HZSM-5, 17% HMCM-22, 20% Al 2 o 3 Catalyst A.

[0014] Weigh 55 grams of HZSM-5 molecular sieve, 17 grams of HMCM-22 molecular sieve, 20 grams of Al 2 o 3 , 3.6 grams of scallop powder, mix it uniformly, add 40 grams of mass concentration of 5% nitric acid aqueous solution, fully knead and extrude into a cylindrical shape with a diameter of 1.5 mm, dry and roast at 600 ° C for 4 hours to make 2 ~ 3 mm long catalyst support.

[0015] 20 g of the above catalyst carrier was impregnated in 14 ml containing 1.09 g of Ga 2 o 3 In the gallium nitrate aqueous solution, the catalyst intermediate was prepared after standing at room temperature for 24 hours, drying, and calcining at 450°C for 6 hours.

[0016] The above catalyst intermediate was impregnated in 14 ml containing 0.65 g La 2 o 3 In the lanthanum nitrate aqueous solution, the catalyst A w...

Embodiment 2

[0019] The preparation of this embodiment includes: based on the total weight of the catalyst, 2% P 2 o 5 , 3% Ga 2 o 3 , 40% HZSM-5, 25% HMCM-22, 30% Al 2 o 3 Catalyst B.

[0020] Weigh 40 grams of HZSM-5 molecular sieve, 25 grams of HMCM-22 molecular sieve, 30 grams of Al 2 o 3 , 3.8 grams of scallop powder, mixed evenly, adding 40 grams of nitric acid aqueous solution with a mass concentration of 5%, fully kneaded and extruded into a cylindrical shape with a diameter of 1.5 mm, dried and roasted at 520 ° C for 4 hours to make 2 ~ 3 mm long catalyst support.

[0021] 20 g of the above catalyst carrier was impregnated in 14 ml containing 0.63 g of Ga 2 o 3 In the gallium nitrate aqueous solution, the catalyst intermediate was prepared after standing at room temperature for 24 hours, drying, and calcining at 480°C for 4 hours.

[0022] The above catalyst intermediate was impregnated in 14 ml containing 0.42 g P 2 o 5 In the ammonium dihydrogen phosphate aqueous sol...

Embodiment 3

[0025] The preparation of this embodiment includes: based on the total weight of the catalyst, 5% La 2 o 3 , 8% Ga 2 o 3 , 20% HZSM-5, 40% HMCM-22, 27% Al 2 o 3 Catalyst C.

[0026] Weigh 20 grams of HZSM-5 molecular sieve, 40 grams of HMCM-22 molecular sieve, 27 grams of Al 2 o 3 , 3.5 grams of scallop powder, mixed evenly, adding 40 grams of nitric acid aqueous solution with a mass concentration of 5%, fully kneaded and extruded into a cylindrical shape with a diameter of 1.5 mm, dried and roasted at 550 ° C for 4 hours to make 2 ~ 3 mm long catalyst support.

[0027] 20 g of the above catalyst carrier was impregnated in 14 ml containing 1.84 g of Ga 2 o 3 In the gallium nitrate aqueous solution, the catalyst intermediate was prepared after standing at room temperature for 24 hours, drying, and calcination at 500°C for 4 hours.

[0028] The above catalyst intermediate was impregnated in 14 ml containing 1.15 g La 2 o 3 In the lanthanum nitrate aqueous solution, t...

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Abstract

The invention relates to a catalyst for preparing aromatic hydrocarbons by methanol conversion and a preparation method thereof, and mainly solves problems of complex technical route flow and low object product selectivity of a prior art. The catalyst comprises a) 20-80 parts of molecular sieve carrier, b) 0.1-20 parts of gallium element or oxide thereof carried by the molecular sieve carrier, c) 0.1-12 parts of lanthanum or phosphor element or oxide thereof, d) 20-80 parts of binder; and the molecular sieve comprises HZSM-5 and HMCM-22 in a mass ratio of 0.1-10:1. The invention also provides a preparation method of the catalyst. The above technical scheme well solves the problems and can be applied to industrial production of aromatic hydrocarbons by methanol conversion.

Description

technical field [0001] The invention relates to a catalyst for converting methanol into aromatics and a preparation method thereof. Background technique [0002] Aromatics (especially Benzene, Toluene and Xylene, collectively referred to as BTX) are important basic petrochemical raw materials. Aromatics in my country mainly come from petroleum resources, and the shortage of petroleum resources in my country determines that aromatics Due to the scarcity of resources, it is very important to find a new technology that can replace petrochemical production of aromatics. [0003] Due to the shortage of oil and natural gas resources in my country and the relative abundance of coal resources, in recent years, my country's production of methanol using coal as raw material is developing towards large-scale and energy-saving development, and the output continues to increase. The production capacity of methanol will far exceed the actual demand, so methanol production is actively carrie...

Claims

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Application Information

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IPC IPC(8): B01J29/80C07C1/20C07C15/00C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 林秀英滕加伟李斌朱慧芬
Owner CHINA PETROLEUM & CHEM CORP
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