B acid-enriched mesoporous alumina, as well as preparation method and application thereof

A mesoporous alumina, B acid technology, used in alumina/hydroxide preparation, chemical instruments and methods, cracking, etc., can solve the change of alumina acidity without specific characterization and testing, and the pore structure is not The problems such as obvious improvement have been achieved, and the effect of good application prospect, high pore volume and high B/L ratio has been achieved.

Active Publication Date: 2017-05-17
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have successfully introduced boron into the bulk phase of alumina, but no specific characterization and testing have been made for the change of the acidity of alumina.
[0007] CN103896318A discloses a method for modifying the pore structure and surface acidity of alumina with P123 and ammonium fluoroborate. Although the preparation method can make the surface of modified alumina have certain B acid sites, the pore structure has not been significantly improved. to improve

Method used

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  • B acid-enriched mesoporous alumina, as well as preparation method and application thereof
  • B acid-enriched mesoporous alumina, as well as preparation method and application thereof
  • B acid-enriched mesoporous alumina, as well as preparation method and application thereof

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Embodiment 1

[0049] This embodiment provides a kind of B-acid-rich mesoporous alumina, and the steps of preparing the B-acid-rich mesoporous alumina include:

[0050] (1) 22g of pseudo-boehmite is added to 50mL of deionized water and beaten for 5-10min to obtain a pseudo-boehmite slurry; 30mL of 1mol / L hydrochloric acid solution is added dropwise to the pseudo-boehmite slurry to make it Acidify and peptize, and continue stirring for 10-15 minutes after the dropwise addition to obtain pseudo-boehmite sol.

[0051] (2) In above-mentioned pseudo-boehmite sol, add dropwise the aqueous solution of 0.03mol ammonium fluorosilicate with 40mL deionized water dissolving, then add dropwise the aqueous solution of 13g Pluronic P123 with 40mL deionized water dissolving, obtain the first mixture.

[0052] (3) The first mixture was reacted at 60-90° C. for 6 hours, cooled after the reaction, and then adjusted to pH 11 with ammonia water, and aged in a water bath at 75° C. for 24 hours to obtain the seco...

Embodiment 2

[0055] This embodiment provides a kind of B-acid-rich mesoporous alumina, and the steps of preparing the B-acid-rich mesoporous alumina include:

[0056] (1) 22g of pseudo-boehmite is added to 50mL of deionized water and beaten for 5-10min to obtain a pseudo-boehmite slurry; 30mL of 1mol / L hydrochloric acid solution is added dropwise to the pseudo-boehmite slurry to make it Acidify and peptize, and continue stirring for 10-15 minutes after the dropwise addition to obtain pseudo-boehmite sol.

[0057] (2) In the above-mentioned pseudo-boehmite sol, add dropwise the aqueous solution of 0.045mol ammonium fluorosilicate with 40mL deionized water dissolving, then add dropwise the aqueous solution of 13g Pluronic P123 dissolved with 40mL deionized water, to obtain the first mixture.

[0058] (3) The first mixture was reacted at 60-90° C. for 6 hours, cooled after the reaction, and then adjusted to pH 11 with ammonia water, and aged in a water bath at 75° C. for 24 hours to obtain t...

Embodiment 3

[0061] This embodiment provides a kind of B-acid-rich mesoporous alumina, and the steps of preparing the B-acid-rich mesoporous alumina include:

[0062] (1) 22g of pseudo-boehmite is added to 50mL of deionized water and beaten for 5-10min to obtain a pseudo-boehmite slurry; 30mL of 1mol / L hydrochloric acid solution is added dropwise to the pseudo-boehmite slurry to make it Acidify and peptize, and continue stirring for 10-15 minutes after the dropwise addition to obtain pseudo-boehmite sol.

[0063] (2) in above-mentioned pseudo-boehmite sol, add dropwise the aqueous solution of 0.06mol ammonium fluorosilicate with 40mL deionized water dissolving, then add dropwise the aqueous solution of 13g Pluronic P123 with 40mL deionized water dissolving, obtain the first mixture.

[0064] (3) The first mixture was reacted at 60-90° C. for 6 hours, cooled after the reaction, and then adjusted to pH 11 with ammonia water, and aged in a water bath at 75° C. for 24 hours to obtain the seco...

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Abstract

The invention provides a B acid-enriched mesoporous alumina, as well as a preparation method and application thereof. The preparation method of the B acid-enriched mesoporous alumina comprises the following steps: (1) acidifying and peptizing pseudo-boehmite slurry by using an inorganic acid solution to obtain pseudo-boehmite sol; (2) adding an aqueous solution of an acidic modifying agent into the pseudo-boehmite sol and then adding an aqueous solution of a pore-enlarging agent to obtain a first mixture; (3) performing a reaction on the first mixture for a period of time under the heating condition, and after the reaction, sequentially cooling, adjusting the pH value to 9 to 11 and ageing to obtain a second mixture; (4) directly drying the second mixture at 60 to 110 DEG C for 12 to 24 hours without filtering and washing the second mixture, and roasting at 500 to 700 DEG C for 4 to 8 hours to prepare the B acid-enriched mesoporous alumina. The B acid-enriched mesoporous alumina provided by the invention has the characteristics of high B/L ratio, high pore volume and large aperture.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a B-acid-rich mesoporous alumina and its preparation method and application. Background technique [0002] Catalytic cracking is an important process in petroleum refining. With the gradual reduction of light crude oil production, the proportion of heavy oil processing continues to increase, and the deterioration of raw materials puts forward higher requirements for catalysts. The poor quality of catalytic cracking raw materials makes catalyst coking become the main problem of catalyst deactivation, which not only reduces the conversion rate, causes waste of raw materials, but also affects product quality. Therefore, suppressing catalyst coking has become the main research goal of preparing new catalytic cracking catalysts. There are two types of acid sites in FCC catalysts: (B) acid center, Lewis (L) acid center, B acid is the cracking center of the catalytic cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J35/10C10G11/04C10G45/04C01F7/30
CPCC10G11/04C10G45/04C01F7/306B01J21/04B01J35/1019B01J35/1042B01J35/1047B01J35/1061C01P2002/72C01P2002/82C01P2006/17
Inventor 白鹏吴萍萍许本静刘欣梅谢梦洁阎子峰
Owner PETROCHINA CO LTD
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