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Mordenite catalyst with special morphology

A mordenite and catalyst technology, applied in the field of aromatic hydrocarbon transalkylation reaction, can solve the problem of poor diffusion performance of molecular sieve catalyst, and achieve the effects of excellent reaction performance, smooth diffusion pores and large aromatic hydrocarbon processing capacity

Active Publication Date: 2020-03-27
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 to provide a novel mordenite with chain-like morphology as the carrier of the catalyst in order to overcome the problem of poor diffusion performance of molecular sieve catalysts in the prior art. In the conversion of aromatic hydrocarbons such as base transfer and isomerization, it has efficient management performance for aromatic ring side chain alkyl groups, and can adapt to high space velocity reaction conditions and mass transfer requirements

Method used

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  • Mordenite catalyst with special morphology
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Experimental program
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Effect test

Embodiment 1

[0033]Mordenite with a chain shape (referred to as LM, with a silicon-aluminum ratio of 25), weighed 78 grams, added 20 grams of pseudo-boehmite, kneaded evenly, extruded, and dried to obtain a catalyst matrix. Calcined at 580°C for 3 hours, and pelletized to obtain the catalyst.

[0034] With the above-mentioned catalyst, the catalyst evaluation was carried out on a fixed-bed continuous micro-reactor near hydrogen, and the reactor specification was The loading capacity is 20.0 grams, and the aromatic hydrocarbon transalkylation reaction uses toluene and trimethylbenzene with a molar ratio of 50:50 as the model raw material, and the molar ratio of hydrogen to hydrocarbon is H 2 / HC=2.8 (The following examples and comparative examples are all evaluated according to the above conditions). First use hydrogen to exhaust the air in the reaction system and pressurize it to 3.5MPa, and control the feed reaction space velocity of the above raw materials to 2.0h -1 , the raw materia...

Embodiment 2

[0039] Weigh 78 grams of LM dry powder, add scandium nitrate (according to the amount of 2.5%wt metal oxide), add 40 grams of aluminum dihydrogen phosphate, knead evenly, extrude and dry to obtain the catalyst matrix, the matrix is ​​in the air atmosphere 550 ℃ Calcined for 5 hours, pelletized to obtain the catalyst.

[0040] With the catalyzer that above-mentioned embodiment makes, under the working condition of referring to embodiment 1, first discharge the air of reaction system with hydrogen and pressurize to 3.0MPa, the feeding reaction space velocity of control above-mentioned raw material is 2.5h -1 , control the reaction temperature to 395°C.

Embodiment 3

[0042] Take by weighing 78 grams of LM dry powder, add yttrium nitrate (according to the amount of 2.5%wt metal oxide), add 40 grams of aluminum sulfate again, knead uniformly, extrude molding, dry to obtain catalyst matrix, matrix roasts 550 ℃ in air atmosphere Hours, pelletized to obtain the catalyst.

[0043] With the catalyzer that above-mentioned embodiment makes, under the working condition of referring to embodiment 1, first discharge the air of reaction system with hydrogen and pressurize to 3.0MPa, the feeding reaction space velocity of control above-mentioned raw material is 2.5h -1 , control the reaction temperature to 395°C.

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Abstract

The invention relates to a mordenite catalyst with a special morphology. While the chain morphology improves the efficient mass transfer performance of the molecular sieve catalyst, it mainly solves the problem of low activity and selectivity of the catalyst in the aromatic hydrocarbon alkyl transfer reaction. The catalyst adopts chain morphology. The technical solution uses mordenite with a morphological shape as a carrier, and the active components include at least one element selected from IIIB, at least one element selected from VB, and at least one metal element selected from IIIA, which better solves this technical problem. , can be used in the industrial production of aromatic hydrocarbons such as aromatic hydrocarbon alkylation reactions.

Description

technical field [0001] The invention relates to a mordenite catalyst with a special shape and a preparation method thereof. The special shape is a chain shape, and the catalyst is applied to the transalkylation reaction of aromatic hydrocarbons. Background technique [0002] With the continuous development of the polyester industry, it is of great significance to develop the conversion technology between aromatics and regulate the production of main aromatics products such as benzene (B), toluene (T) and xylene (X). Molecular sieve is a catalytic material widely used in the catalytic process of petrochemical industry. As one of the earliest zeolites recognized by human beings, mordenite has special acid distribution and regular mass transfer channels. Structuring and other petrochemical fields have important industrial application value. [0003] In the two-dimensional pore system of mordenite, for the reaction of macromolecules such as aromatic hydrocarbons, the catalytic ...

Claims

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Application Information

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IPC IPC(8): B01J29/18B01J29/26C07C6/12C07C15/08C07C15/04
CPCC07C6/126B01J29/18B01J29/185B01J29/26C07C2523/22C07C2523/20C07C2523/10C07C2523/08C07C2521/04C07C2529/26C07C2529/18B01J2229/18B01J35/50C07C15/08C07C15/04Y02P20/52
Inventor 童伟益陈雪梅李经球祁晓岚
Owner CHINA PETROLEUM & CHEM CORP