Catalyst for preparing aromatics by use of methanol and preparation method of catalyst

A catalyst and aromatics technology, applied in the field of methanol to aromatics catalyst and its preparation, can solve the problems of low reaction activity and high yield of BTX, and achieve the effects of high reaction activity and high yield of aromatics

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] One of the technical problems to be solved by the present invention is the technical problem of low reaction activity in the process of methanol-to-aromatics in the prior art, and a new methanol-to-aromatics catalyst is provided, which has the advantages of high yield of aromatics and high yield of BTX

Method used

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  • Catalyst for preparing aromatics by use of methanol and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 90g of pseudo-boehmite and mix it with 600g of water, add 110g of orthophosphoric acid (85%) under stirring condition, continue stirring evenly, add 55g of silica sol (40%), 50g of triethylamine and 50g of tetraethyl hydroxide Ammonium, stir evenly; weigh 135g of H-type ZSM-5 molecular sieve, add it to the above mixed solution, and stir evenly; transfer the mixed solution to a closed high-pressure crystallization kettle, and crystallize at 180°C for 48h; after the product is taken out, pass Washing with water, drying, and roasting at 550°C for 4 hours to remove the template agent, to obtain the SAPO-34 / ZSM-5 composite molecular sieve, quantified by XRD diffraction, the weight content of the SAPO-34 molecular sieve in the product is 50%, and the weight content of the ZSM-5 molecular sieve is 50%. %.

[0034] Weigh 20g SAPO-34 / ZSM-5 composite molecular sieve, mix it with 20g pseudoboehmite and 1.0g scallop powder, add an appropriate amount of dilute nitric acid, kne...

Embodiment 2

[0037] Weigh 20g of the SAPO-34 / ZSM-5 composite molecular sieve prepared in Example 1, mix it with 20g of silica sol (40% wt) and 1.0g of soluble starch, knead it evenly, and shape it by extrusion. Calcined for 6h to obtain the catalyst precursor. Using the impregnation method, the catalyst precursor was impregnated with 3% Zn using zinc nitrate aqueous solution as the impregnation solution, and then dried and calcined at 550°C for 3 hours to obtain the methanol-to-aromatics catalyst MTA-2.

[0038] The reactivity evaluation of the catalyst adopts the method of Example 1, and the results are listed in Table 1.

Embodiment 3

[0040] Weigh 20g of the SAPO-34 / ZSM-5 composite molecular sieve prepared in Example 1, mix it with 15g of pseudoboehmite, 5g of fumed silica, and 1g of celadon powder, add an appropriate amount of dilute nitric acid, knead evenly and use The catalyst precursor was obtained by extrusion molding, drying and calcination at 560°C for 4 hours. Using the impregnation method, the catalyst precursor was impregnated with 3% Zn using zinc nitrate aqueous solution as the impregnation solution, and then dried and calcined at 550°C for 5 hours to obtain the methanol-to-aromatic catalyst MTA-3.

[0041] The reactivity evaluation of the catalyst adopts the method of Example 1, and the results are listed in Table 1.

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Abstract

The invention relates to a catalyst for preparing aromatics by use of methanol and a preparation method of the catalyst, aiming at solving the problem that the catalyst in the prior art has low reaction activity. The catalyst is prepared from the following raw materials in parts by weight: (a) 25-85 parts of SAPO-34 / ZSM-5 composite molecular sieve; (b) 1-10 parts of metal element; and (c) 10-70 parts of structural promoter. The catalyst can solve the above problem well and can be used for industrial production for preparing aromatics by use of methanol.

Description

technical field [0001] The invention relates to a catalyst for preparing aromatics from methanol and a preparation method thereof, in particular to a catalyst containing SAPO-34 / ZSM-5 composite molecular sieve and a preparation method thereof. [0002] Background technique [0003] Aromatics (in which benzene, toluene and xylene are respectively called B, T and X, and the three are collectively called BTX) are important basic organic chemical raw materials. Aromatics mainly come from catalytic reforming and steam cracking by-product pyrolysis gasoline (nearly 90%)-petroleum route, and only about 10% from coal route. With the development of the economy, BTX aromatics, especially from the Asia-Pacific region, still maintain a strong market demand. However, with the continuous consumption of petroleum resources and rising prices, the production cost of aromatics using petroleum as raw material has risen sharply. Therefore, in the long run, the conversion of coal-based metha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C07C1/20C07C15/02C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 陈希强汪哲明
Owner CHINA PETROLEUM & CHEM CORP
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