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Catalyst and applications in C11<+> heavy aromatic hydrocarbon lightening reactions

A technology for lightening heavy aromatics and catalysts. It is applied in the direction of catalysts, molecular sieve catalysts, and carbon compound catalysts. It can solve the problems of inability to process full fractions, catalysts are not resistant to sulfur, and the purity of aromatic products is not high, so as to suppress excessive hydrogenation. The effect of reaction and strong anti-coking ability

Active Publication Date: 2019-08-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that in the prior art, the whole fraction C cannot be processed when the aromatics are the target product. 11 + Inferior heavy aromatics, the catalyst is not resistant to sulfur and the purity of aromatic products is not high

Method used

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  • Catalyst and applications in C11&lt;+&gt; heavy aromatic hydrocarbon lightening reactions
  • Catalyst and applications in C11&lt;+&gt; heavy aromatic hydrocarbon lightening reactions
  • Catalyst and applications in C11&lt;+&gt; heavy aromatic hydrocarbon lightening reactions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] After mixing hydrogen-type zeolite beta (SAR=25) with a particle size of 60-80nm and pseudo-boehmite, kneading, extruding, drying at 120°C, and roasting in an air atmosphere at 550°C for 4 hours, the desired Catalyst carrier. Prepare a bimetallic solution with tetraammineplatinum chloride and ammonium molybdate, impregnate the catalyst carrier by an equal-volume impregnation method, dry at 120°C, and then bake in an air atmosphere at 500°C for 2 hours to obtain a catalyst precursor. The catalyst precursor is reduced to 450°C under the condition of hydrogen, injected with carbon disulfide sulfurizing agent and vulcanized for 4 hours to obtain the desired lightweight catalyst C1. Its composition is: 0.10 parts of Pt-4.2 parts of MoO 2 -16.8 MoOs 3 -0.9 MoS 2 / 55 parts of beta zeolite - 23 parts of Al 2 o 3 .

[0076] The raw materials and reaction conditions are the same as [Comparative Example 1]. After 24 hours of stable operation, sampling analysis showed that t...

Embodiment 2

[0078] Hydrogen type beta zeolite (SAR=ratio 40) with a particle size of 200-240nm is fully mixed with titanium oxide powder and pseudo-boehmite, kneaded, extruded, dried at 120°C, and then roasted in an air atmosphere of 550°C for 4 hours, the desired catalyst carrier is obtained. A bimetallic solution was prepared with cobalt nitrate and ammonium tungstate, the catalyst carrier was impregnated by an equal volume impregnation method, dried at 120°C and then calcined in an air atmosphere at 500°C for 2 hours to obtain a catalyst precursor. The catalyst precursor was reduced to 450°C under hydrogen, injected into dimethyl disulfide and vulcanized for 4 hours to obtain the desired lightweight catalyst C2. Its composition is: 4 parts of Co-10.2 parts of WO 2 -11.9 WOs 3 -1.2 copies of WS 2 / 52 parts of beta zeolite - 6 parts of Al 2 o 3 -14.7 parts of TiO 2 .

[0079] The raw materials and reaction conditions are the same as [Comparative Example 1]. After 24 hours of stab...

Embodiment 3

[0081] Hydrogen-type mordenite (SAR=16) with a particle size of 160-180nm is fully mixed with SIRAL20 amorphous silica-alumina and pseudo-boehmite, kneaded, extruded, dried at 120°C, and then calcined in an air atmosphere at 550°C for 4 hours, the desired catalyst carrier is obtained. A bimetallic solution was prepared with chloroiridic acid and ammonium molybdate, the catalyst carrier was impregnated by an equal volume impregnation method, dried at 120°C and then calcined in an air atmosphere at 500°C for 2 hours to obtain a catalyst precursor. The catalyst precursor is reduced to 450°C under the condition of hydrogen, and injected into carbon disulfide curing agent for sulfidation for 4 hours to obtain the desired lightweight catalyst C3. Its composition is: 0.5 parts of Ir-8.5 parts of MoO 2 -13.5 MoOs 3 -1.7 MoS 2 / 53 parts of mordenite-18 parts of Al 2 o 3 -4.8 parts of SiO 2 .

[0082] The raw materials and reaction conditions are the same as [Comparative Example ...

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Abstract

The invention relates to a catalyst and applications in C11<+> heavy aromatic hydrocarbon lightening reactions, wherein the catalyst comprises, by weight, a) 5-80 parts of solid acid zeolite, b) 0.05-8 parts of a Group VIII metal, c) 3-25 parts of a Group VIB metal oxide, d) 0.1-2 parts of a Group VIB metal sulfide, and e) 20-95 parts of a binder. According to the present invention, the catalyst can be used for producing light aromatic hydrocarbons from full-distillate C11<+> poor-quality heavy aromatic hydrocarbons.

Description

technical field [0001] The present invention relates to a kind of catalyst and its C 11 + Application in the lightening reaction of heavy aromatics. Background technique [0002] Benzene and p-xylene (PX) are important basic organic chemical raw materials, which are widely used in the production of polyester, chemical fiber and other products. They are closely related to the development of the national economy and people's basic necessities of life. The demand has been strong and increasing rapidly in recent years. There are two main processes for the source of aromatics raw materials: one is to obtain aromatics raw materials through catalytic reforming of naphtha and extraction of aromatics; In petrochemical plants, the aromatics complex usually uses p-xylene (co-production ortho-xylene) as the target product to provide raw materials for the downstream PTA unit. To produce the largest amount of p-xylene, in addition to catalytic reforming and ethylene pyrolysis of xylene...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J29/26B01J29/78B01J29/80B01J29/85C07C4/18C07C15/08C07C15/04C07C15/06C10G47/18C10G47/20
CPCB01J29/005B01J29/166B01J29/26B01J29/48B01J29/7815B01J29/7846B01J29/80B01J29/85B01J2229/18B01J2229/42C07C4/18C07C2529/16C07C2529/26C07C2529/78C07C2529/80C07C2529/85C10G47/18C10G47/20C07C15/08C07C15/04C07C15/06Y02P20/52
Inventor 郑均林孔德金姜向东徐旋宋奇祁晓岚童伟益
Owner CHINA PETROLEUM & CHEM CORP
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