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Dechlorination method of microsphere solid and application thereof

A technology of microspheres and solids, applied in the direction of microsphere preparation, chemical instruments and methods, catalyst carriers, etc., can solve the problems of intensified corrosion of equipment, low yield of aromatics, low catalyst aromatization activity, etc., and achieve the goal of reducing severity Effect

Pending Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the technical problems that when the existing catalyst is used in the aromatics production process, the high Cl content of the catalyst leads to aggravated equipment corrosion, and the aromatization activity of the catalyst after dechlorination is low and the yield of aromatics is low, and provides a new catalyst. The microsphere solid dechlorination method, the aromatization catalyst with the dechlorination microsphere solid as the carrier has the advantages of high aromatization activity and high yield of aromatic hydrocarbons

Method used

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  • Dechlorination method of microsphere solid and application thereof
  • Dechlorination method of microsphere solid and application thereof
  • Dechlorination method of microsphere solid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 80 grams of ZSM-5 molecular sieves (the molar ratio of silicon oxide to aluminum oxide=100), 476.2 grams of Al sol (21wt% Al 2 o 3 ), 158 grams of kaolin and 1500 grams of water are mixed uniformly to obtain a slurry, and the slurry is spray-dried to prepare a microsphere solid precursor SP1 with an average particle diameter of 72 microns, and the microsphere solid ZT1 is prepared by roasting at 550 ° C for 4 hours. It is 2850ppm.

[0067] Get 169 grams of microsphere solid ZT1 with 500 grams of buffer solution containing 9.5 grams of phosphoric acid and 9.5 grams of ammonium dihydrogen phosphate (pH=3.2) (the liquid-solid ratio of buffer solution and microsphere solid ZT1 is 3) at a temperature of 50 ° C, usually After being treated under pressure for 96 hours, it was washed with deionized water, dried at 120°C for 12 hours, and then calcined at 600°C for 3.5 hours to obtain the P-modified and dechlorinated microsphere solid DCL-1.

[0068] Take 90 grams of microsphe...

Embodiment 2

[0071] 80 grams of ZSM-5 molecular sieves (the molar ratio of silicon oxide to aluminum oxide=100), 476.2 grams of Al sol (21wt% Al 2 o 3 ), 158 grams of kaolin and 1500 grams of water are mixed uniformly to obtain a slurry, and the slurry is spray-dried to prepare a microsphere solid precursor SP1 with an average particle diameter of 72 microns, and the microsphere solid ZT1 is prepared by roasting at 550 ° C for 4 hours. It is 2850ppm.

[0072] Get 169 grams of microsphere solid ZT1 with 500 grams of aqueous solution containing 5 grams of phosphoric acid and 15.04 grams of ammonium dihydrogen phosphate (pH=3.8) (the liquid-solid ratio of the buffer solution and microsphere solid ZT1 is 3) at a temperature of 50 ° C under normal pressure After being treated at low temperature for 96 hours, it was washed with deionized water, dried at 120°C for 12 hours, and then calcined at 600°C for 3.5 hours to obtain the P-modified and dechlorinated microsphere solid DCL-2.

[0073] Take...

Embodiment 3

[0076] 80 grams of ZSM-5 molecular sieves (the molar ratio of silicon oxide to aluminum oxide=100), 476.2 grams of Al sol (21wt% Al2 o 3 ), 158 grams of kaolin and 1500 grams of water are mixed uniformly to obtain a slurry, and the slurry is spray-dried to prepare a microsphere solid precursor SP1 with an average particle diameter of 72 microns, and the microsphere solid ZT1 is prepared by roasting at 550 ° C for 4 hours. It is 2850ppm.

[0077] Get 169 grams of microsphere solid ZT1 with 500 grams of aqueous solution containing 1.5 grams of phosphoric acid and 18.0 grams of ammonium dihydrogen phosphate (pH=5.5) (the liquid-solid ratio of the buffer solution and microsphere solid ZT1 is 3) at a temperature of 50 ° C under normal pressure After being treated for 96 hours, it was washed with deionized water, dried at 120°C for 12 hours, and then calcined at 600°C for 3.5 hours to obtain the P-modified and dechlorinated microsphere solid DCL-3.

[0078] Take 90 grams of carrier...

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Abstract

The invention relates to a microsphere solid dechlorination method and application thereof. The method comprises the following steps: S1, treating a chlorine-containing microsphere solid with a buffer solution containing H3PO4 and NH4H2PO4 to obtain a treated microsphere solid; s2, washing, drying and roasting the treated microsphere solid to obtain a dechlorinated microsphere solid. According to the dechlorination method of the solid microspheres, the severity of dechlorination by adopting hydrothermal treatment in the prior art is greatly reduced, and the number of active centers of most aromatization catalysts can be reserved. An aromatization catalyst prepared by using the microsphere solid dechlorinated by the method as the carrier has high aromatization activity and high aromatic hydrocarbon yield.

Description

technical field [0001] The invention belongs to the technical field of preparation of aromatic hydrocarbons, and in particular relates to a method for dechlorination of microsphere solids and an application thereof. Background technique [0002] Aromatics (in which benzene, toluene and xylene are called B, T and X respectively, 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. From the perspective of energy distribution, my country lacks oil and gas but is rich in coal, and its dependence on foreign crude oil has exceeded 50%, which has threatened national energy security. Moreover, the depletion of petroleum resources and the long-term high volatility of petroleum prices have brought unprecedented severe challenges to energy and chemical industries based on petroleum ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J29/40B01J32/00B01J35/08C07C15/04C07C15/06C07C15/08C07C1/20C07C2/42
CPCB01J13/02B01J29/40B01J29/405C07C1/20C07C2/42B01J2229/186B01J35/51C07C15/04C07C15/06C07C15/08Y02P20/52
Inventor 汪哲明周健肖景娴
Owner CHINA PETROLEUM & CHEM CORP
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