Hydrocracking catalyst and preparation method thereof

A hydrocracking and catalyst technology, applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of poor stability and insignificant improvement in catalyst stability, The problem of increased diffusion resistance of reactants and products, etc., achieves the effects of good stability, improved conversion rate and selectivity

Inactive Publication Date: 2012-01-11
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hydrocracking catalysts containing molecular sieves have the advantages of strong acidity and large specific surface area, but the small pore size of molecular sieves increases the diffusion resistance of reactants and products, which negatively affects the apparent reactivity and product distribution.
The hydrocracking catalyst with heteropolyacid as the acidic component and Ni and Co as the hydrogenation component has the advantages of strong acidity and large pore size, but the stability of this type of catalyst is poor in a high sulfur environment (5000ppm sulfur) , and the stability of the catalyst modified by Mo is not significantly improved

Method used

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  • Hydrocracking catalyst and preparation method thereof
  • Hydrocracking catalyst and preparation method thereof
  • Hydrocracking catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Select the carrier: the carrier is 40-60 mesh, the specific surface is 220m 2 / g of alumina.

[0023] 2) Catalyst preparation: 110ml of nickel nitrate solution with a concentration of 1mol / L and 86ml of ammonium metatungstate solution with a concentration of 1mol / L were added to 62g of the above carrier Al 2 O 3 In the middle, let stand for 10 hours, and then dry at 110 ℃ for 5 hours. The dried solid was raised to 550°C at a rate of 10°C / min in a muffle furnace and kept at a constant temperature for 4h. The calcined solid was immersed in 10 g of phosphotungstic acid aqueous solution, immersed for 8 hours and then dried at 110° C. for 6 hours, and the dried material was pressed into tablets to obtain the catalyst. The chemical composition of the prepared catalyst is listed in Table 1.

[0024] 3) Evaluation conditions: set the prepared catalyst at 5 / 95 (volume ratio) CS 2 / H 2 Vulcanize as sulfide gas at 300°C for 4h. After the vulcanization is completed, cut into hydrog...

Embodiment 2

[0026] 1) Select the carrier: the carrier is 40-60 mesh, the specific surface is 220m 2 / g of alumina.

[0027] 2) Catalyst preparation: 110ml of nickel nitrate solution with a concentration of 1mol / L and 86ml of ammonium metatungstate solution with a concentration of 1mol / L were added to 52g of Al 2 O 3 In the middle, let stand for 10 hours, and then dry at 110 ℃ for 5 hours. The dried solid was raised to 550°C at a rate of 10°C / min in a muffle furnace and kept at a constant temperature for 4h. The calcined solid was immersed in 20 g of phosphotungstic acid aqueous solution, immersed for 8 hours and then dried at 110° C. for 6 hours, and the dried material was pressed into tablets to obtain the catalyst. The chemical composition of the prepared catalyst is listed in Table 1.

[0028] 3) Evaluation conditions: set the prepared catalyst at 5 / 95 (volume ratio) CS 2 / H 2 Vulcanize as sulfide gas at 300°C for 4h. After the vulcanization is completed, cut into hydrogen, and enter n-de...

Embodiment 3

[0030] 1) Select the carrier: the carrier is 40-60 mesh, the specific surface is 220m 2 / g of alumina.

[0031] 2) Catalyst preparation: 110ml of nickel nitrate solution with a concentration of 1mol / L and 86ml of ammonium metatungstate solution with a concentration of 1mol / L were added to 32g of the above carrier Al 2 O 3 In the middle, let stand for 10 hours, and then dry at 110 ℃ for 5 hours. The dried solid was raised to 550°C at a rate of 10°C / min in a muffle furnace and kept at a constant temperature for 4h. The calcined solid was immersed in an aqueous solution containing 40 g of phosphotungstic acid, immersed for 8 hours and then dried at 110° C. for 6 hours, and the dried material was pressed into tablets to obtain the catalyst. The chemical composition of the prepared catalyst is listed in Table 1.

[0032] 3) Evaluation conditions: set the prepared catalyst at 5 / 95 (volume ratio) CS 2 / H 2 Vulcanize as sulfide gas at 300°C for 4h. After the vulcanization is completed, c...

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Abstract

The invention which relates to a solid catalyst provides a hydrocracking catalyst which has a high stability and a high activity in a high sulfur content reaction atmosphere and a preparation method thereof. The catalyst comprises a heteropoly acid, a hydrogenation component, and a carrier, wherein the heteropoly acid is H3PW12O40.nH2O or H4SiW12O40.nH2O with the keggin structure, and n is the number of water; the hydrogenation component is a mixture of a Ni compound and a W compound; and the carrier is alumina. The hydrocracking catalyst is obtained by respectively adding an aqueous solution of a nickel salt and an aqueous solution of a tungsten salt to the carrier for dipping, drying a liquid-solid separated solid, roasting, allowing the roasted solid after dipping with an aqueous solution of the heteropoly acid to stand, and drying.

Description

Technical field [0001] The invention relates to a solid catalyst, especially a long-chain alkane hydrocracking catalyst and a preparation method thereof. Background technique [0002] In the oil refining industry, hydrocracking is an important process for the production of high-quality light oils from heavy oils. It is the hydrogenation, desulfurization and denitrification, molecular framework of the feedstock oil under the conditions of high temperature, high pressure, hydrogen and the presence of catalysts. A conversion process of chemical reactions such as rearrangement and cracking. The technical core of hydrocracking is the catalyst used, which is a dual-function catalyst with both acidic function and hydrogenation function. The acid function of the hydrocracking catalyst involved in US patents US5536687, US5336654, US5447623 and US5350501, European patent EP0028938A1, Chinese patents CN1792446A, CN1694761A, CN1389545A, CN1927461 is mainly provided by molecular sieves, whil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C10G47/12
Inventor 方维平郑进保陈秉辉伊晓东李娟娟赖伟坤
Owner XIAMEN UNIV
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