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Catalyst for preparing aromatic hydrocarbon through methanol conversion as well as preparation method and application thereof

A methanol conversion and catalyst technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of not involving material recycling, low total methanol conversion rate, etc., and achieve long life and high selectivity. , the effect of large amount of raw materials

Inactive Publication Date: 2012-04-18
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of fluidized bed technology can obtain aromatics with high selectivity and control catalyst coking; but this technology does not involve the recycling of materials, so the overall conversion of methanol is low

Method used

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  • Catalyst for preparing aromatic hydrocarbon through methanol conversion as well as preparation method and application thereof
  • Catalyst for preparing aromatic hydrocarbon through methanol conversion as well as preparation method and application thereof
  • Catalyst for preparing aromatic hydrocarbon through methanol conversion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0042]

[0043] Examples 1-5 illustrate the preparation of Component A. The specific preparation method of component A is as follows, the molecular sieve modifier is added to the molecular sieve by impregnation method, the modifier is soluble salt of W, Zn, Co, Cr, such as nitrate, chloride, ammonium tungstate and vinegar Acid acid, etc.; molecular sieves are HZSM-5, HZSM-22, SAPO-11 and SAPO-34. The impregnation process of the molecular sieve modifier is as follows: transfer an appropriate amount of molecular sieve powder to an aqueous solution of a certain concentration of soluble salt of the modifier, the volume ratio of the molecular sieve to the impregnating liquid is 1-5, and at 20-90 o C. Immerse for 1-10 hours under the condition of continuous stirring. After the impregnating liquid evaporates, put it at 100-150 o C drying for 3-8 hours at 350-550 o C for 2-8 hours. The prepared components A are respectively denoted as component A-1, component A-2, component A-3...

Embodiment 6-10

[0046]

[0047] Examples 6-10 illustrate the preparation of Component B. The specific preparation method of component B is as follows, (1) two kinds of metal elements such as Co, Sn, Ce, Re, Mo, Pt, Sn, Cr are added to the oxide carrier by impregnation method Go, that is, the soluble salt (nitrate) containing the loaded metal element is made into an aqueous solution, and the oxide is transferred to the above aqueous solution. o C soaking for 1-10 hours. The above oxide support is γ-Al 2 o 3 and SiO 2 Any of the metal soluble salts are its nitrates, chlorides, acetates, etc. After the above solution was evaporated to dryness, it was heated at 100-150 o C drying for 3-8 hours at 350-550 o C for 2-8 hours. (2) The material processed by (1) is subjected to water chlorination: at 250-550 o C. Treat the material processed by (1) with steam containing HCl for 0.5-5 hours, wherein H 2 The O / HCl molar ratio is 1.0-150:1, the water vapor containing HCl is brought into the tr...

Embodiment 11-15

[0049]

[0050] Examples 11-15 are used to illustrate the preparation method of methanol-to-aromatics catalysts. The specific process is as follows: Component A and Component B are evenly mixed, and then the mixture is extruded into a catalyst, respectively denoted as Catalyst-1, Catalyst-2, Catalyst-3, Catalyst-4 and Catalyst-5. The compatibility of component A and component B in the catalyst is shown in Table 3.

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Abstract

The invention discloses a catalyst for preparing aromatic hydrocarbon through methanol conversion. The catalyst comprises a component A and components B, wherein the mass ratio of component A to components B is 0.25-4; the component A is a modified zeolite molecular sieve and comprises 80-99wt% of molecular sieves and 1-20wt% of molecular sieve modifiers; the components B are oxide loaded metallic elements and halogen and comprise 85-95wt% of oxide, 0.5-10wt% of total metallic elements and 0.1-5wt% of halogen; and the component A and the components B are formed through squashing or extruding after being mixed uniformly. The catalyst has the following characteristics that: (1) the total recovery of benzene, toluene and xylene is higher and selectivity is high; (2) the raw material treatment capacity is large; (3) the non-aromatic hydrocarbon liquid product can serve as the solvent oil or gasoline component; (4) C4 hydrocarbon and non-aromatic hydrocarbon liquid phase products in the gas phase product can circularly enter into the catalyst bed layer, thus not only balancing the reaction heat but also improving the total recovery of the aromatic hydrocarbon; and (5) the catalyst has high activity and long life.

Description

technical field [0001] The invention relates to a catalyst for catalytically converting methanol into light aromatics (benzene, toluene and xylene), a preparation method and application thereof, and belongs to the technical field of catalysts and applications thereof. Background technique [0002] In recent years, my country's coal-based methanol industry has developed rapidly, and there are more than 200 methanol production enterprises, becoming the world's largest producer and consumer of methanol. However, my country's methanol production capacity is developing too fast, and the situation that the production capacity is far greater than market demand will exist for a long time. For example, in 2010, the national methanol production was about 14.8 million tons, and by the end of 2010, my country's methanol production capacity had reached at least 29.534 million tons. It is predicted that the demand for methanol will reach 25-30 million tons in 2015, and the production cap...

Claims

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Application Information

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IPC IPC(8): B01J29/48B01J29/85B01J29/78C07C1/20C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 张昕段超白婷周蕊华媛
Owner NORTHWEST UNIV
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