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Hydrogenation catalyst, preparation and application thereof

A hydrogenation catalyst and oxide technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of limited surface area, decreased molecular sieve crystallinity, irregular pore structure, etc., and achieve excellent application prospects Effect

Active Publication Date: 2015-05-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN103100403 discloses a hydrocracking catalyst prepared by using modified Y molecular sieve and amorphous silica-alumina. Although the cracking conversion rate is improved and the reaction temperature is reduced, the modified Y molecular sieve still has irregular pore structure and the crystallinity of the molecular sieve decreases. and limited surface area, and did not fundamentally solve the problems of conversion, selectivity and stability of hydrocracking catalysts

Method used

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  • Hydrogenation catalyst, preparation and application thereof
  • Hydrogenation catalyst, preparation and application thereof
  • Hydrogenation catalyst, preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Mix the metering raw materials in sequence at the initial gel ratio silica:alumina:sodium oxide:template:water=60:1:5:52:1950, wherein the silicon source is silica sol and the aluminum source is sodium metaaluminate , The lye is sodium hydroxide, the template is tetraethylammonium hydroxide, fully stirred to form a gel, and then put into a polytetrafluoroethylene-lined high-pressure reactor, the crystallization temperature is set at 140 ° C, and the constant temperature crystallization 72 hours. The solid product was separated, washed with deionized water until neutral, and dried in an air atmosphere at 85° C. for 24 hours to obtain a Beta-1 molecular sieve.

Embodiment 2

[0016] Mix the metering raw materials in sequence at the initial gel ratio silica:alumina:sodium oxide:template:water=40:1:3:28:1630, wherein the silicon source is tetraethyl orthosilicate and the aluminum source is partial Sodium aluminate, lye is sodium hydroxide, template is tetraethylammonium hydroxide, fully stirred to form a gel, and then put into a polytetrafluoroethylene-lined high-pressure reactor, and the crystallization temperature is set at 132°C. Constant temperature crystallization for 120 hours. The solid product was separated, washed with deionized water until neutral, and dried in an air atmosphere at 85° C. for 24 hours to obtain a Beta-2 molecular sieve.

Embodiment 3

[0018] Take 1L of the Beta molecular sieve liquid prepared by the method in Example 1, add 19.5g of pore-forming agent cetyltrimethylammonium chloride, adjust the pH value of the solution to 6.8 after mixing evenly, slowly add the diluted pre-hydrolyzed and mixed solution of tetraethyl orthosilicate and aluminum nitrate, wherein the molar ratio of silicon source to surfactant is 1:0.26, and the molar ratio of silicon source to aluminum source is 80. The coating reaction was carried out at a temperature of 30° C. at a rotation speed of 1000 rpm for 5 hours. Put the above solution into a hydrothermal reaction kettle and age at 85°C for 45 hours. After the whole aging process, the obtained molecular sieve solids are separated, washed and dried, and finally roasted at 550°C for 3 hours in an air atmosphere to remove the molecular sieve pores. Surfactants to obtain mesoporous silica-alumina-coated Beta molecular sieves, denoted as ASABeta-1.

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Abstract

The invention relates to a hydrogenation catalyst and a preparation method thereof. The active metals are the VIB group metal and VIII group metal, the carrier is composed of a composite molecular sieve, alumina, silicon dioxide and a binder, and the composite molecular sieve is an hierarchical porous composite molecular sieve formed by cladding a microporous Beta molecular sieve with mesoporous amorphous silicon-aluminum. The preparation method of the hydrogenation catalyst includes: (1) mixing the composite molecular sieve, alumina, silicon dioxide and the binder evenly to conduct molding; performing drying in an atmosphere of 80-130DEG C, and conducting roasting at 400-600DEG C; and (2) preparing an impregnation solution from a compound containing active metal component elements, dipping the carrier, then drying the carrier at 80-130DEG C, and conducting calcination at 400-600DEG C. The catalyst is used for hydrocracking reaction of vacuum distillate oil, improves the reaction catalytic activity, promotes selective generation of middle distillate oil, effectively inhibits secondary cracking side reaction, and reduces the yield of low-boiling-point distillates.

Description

technical field [0001] The invention belongs to a hydrogenation catalyst and its preparation and application, in particular to a hydrogenation catalyst in which a multi-stage composite molecular sieve composed of mesoporous amorphous silicon-aluminum coated microporous Beta molecular sieves is an acidic component and a preparation method thereof . Background technique [0002] Hydrocracking technology, as an important processing method for lightening heavy oil, upgrading inferior oil products and refining and chemical integration, has the advantages of flexible production plan, strong adaptability of raw materials, high selectivity of target products, good quality and high added value of tail oil . Hydrocracking catalyst is the core of hydrocracking technology, so the research, development and application of hydrocracking catalyst is also the main content of hydrocracking technology progress. The hydrocracking catalyst is a typical dual-function catalyst. The catalyst supp...

Claims

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Application Information

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IPC IPC(8): B01J29/78C10G47/20
Inventor 袁晓亮兰玲王书芹胡胜胡亚琼梁长海汪镭鞠雅娜金辰赵秦峰吕忠武鲁旭陈芬芬王延飞
Owner PETROCHINA CO LTD
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