Preparation method of catalyst carrier for hydrotreating pretreatment of wax oil

A catalyst carrier and wax oil hydrogenation technology, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problem that molecular sieve cannot effectively match the acid center, and achieve the effect of facilitating dispersion and increasing acidity

Active Publication Date: 2013-09-18
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single introduction of molecular sieves cannot effectively match the acid centers and hydrogenation centers. It is necessary to comprehensively modify the surface of the support and impregnate the active metal at the locked position to develop a high-activity hydrocracking pretreatment catalyst.

Method used

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  • Preparation method of catalyst carrier for hydrotreating pretreatment of wax oil
  • Preparation method of catalyst carrier for hydrotreating pretreatment of wax oil
  • Preparation method of catalyst carrier for hydrotreating pretreatment of wax oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment -1

[0022] HY / AlPO 4 Synthesis of -5 composite molecular sieve: Mix 109.0 g of phosphoric acid (AR, mass concentration 85%) and 306.0 g of deionized water in a 35 °C water bath, add 60.0 g of pseudoboehmite (Shandong aluminum powder, aluminum oxide Content 67.0wt%), constant temperature and uniform stirring for 0.5 h to obtain aluminum phosphate sol; add 4.0 g poly N,N-ditetraethylammonium hydrochloride (referred to as PCD, Henan Daochun Co., Ltd., purity 95%), and slowly stir After 0.5 h, add 64.0 g of triethylamine (abbreviated as TEA, with a purity of 99%), and continue to stir for 0.5 h until a uniform sol is formed. The molar ratio of the materials in this reaction system is Al 2 o 3 :P 2 o 5 :TEA:H 2 O=1:1.05:1.2:50. The sol was put into a polytetrafluoroethylene autoclave and aged at 100 °C (heating rate 1 °C / min) for 4 h to obtain AlPO 4 -5 molecular sieve seed crystals, and then add 45.0 g HY molecular sieves (Shanghai Xinnian Auxiliary Co., Ltd., with a silicon-alu...

Embodiment -2

[0024] Synthesis of USY / SAPO-5 composite molecular sieve: Mix 109.0 g of phosphoric acid and 306.0 g of deionized water in a 35 °C water bath, add 60.0 g of pseudoboehmite, and stir at a constant temperature for 0.5 h to obtain aluminum phosphate sol; add 4.0 g PCD, after stirring slowly for 0.5 h, add 16.0 g tetraethyl orthosilicate (referred to as TEOS, purity 99%), then slowly stir for 0.5 h, add 64.0 g TEA, continue stirring for 0.5 h until a uniform sol is formed, the reaction system The material molar ratio in Al 2 o 3 :P 2 o 5 : SiO 2 :TEA:H 2 O=1:1.05:0.2:1.2:50. The sol was put into a polytetrafluoroethylene high-pressure reactor, aged at 90 °C (heating rate 1 °C / min) for 8 h, and SAPO-5 molecular sieve seeds were obtained, and then 40.0 g of USY (Shanghai Xinnian Auxiliary Co., Ltd. company, with a silicon-aluminum ratio of 12) molecular sieves, after crystallization at 185 °C for 24 h. The crystallized product was separated, the obtained solid product was was...

Embodiment -3

[0026] Beta / AlPO 4 Synthesis of -5 composite molecular sieve: Mix 114.0 g phosphoric acid and 306.0 g deionized water in a 35 °C water bath, add 60.0 g pseudo-boehmite, and stir at a constant temperature for 0.5 h to obtain aluminum phosphate sol; add 4.0 g PCD, After stirring slowly for 0.5 h, add 64.0 g TEA and continue stirring for 0.5 h until a uniform sol is formed. The molar ratio of the materials in this reaction system is Al 2 o 3 :P 2 o 5 :TEA:H 2 O=1:1.1:1.2:50. The sol was put into a polytetrafluoroethylene autoclave and aged at 100 °C (heating rate 1 °C / min) for 4 h to obtain AlPO 4 -5 molecular sieve seed crystals, and then add 45.0 g Beta molecular sieves (Shanghai Xinnian Auxiliary Co., Ltd., with a silicon-aluminum ratio of 24), and crystallize at 175 °C for 36 h. The crystallized product was separated, the obtained solid product was washed with deionized water to pH=7~8, and dried at 120 °C for 8 h to obtain Beta / AlPO 4 -5 composite molecular sieve raw ...

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Abstract

The invention discloses a preparation method of a catalyst carrier for hydrotreating pretreatment of wax oil. The carrier prepared by the method comprises the main components and contents based on the carrier by weight percent: 25 to 45wt% of a silicon aluminum-phosphorus aluminum composite molecular sieve, 30 to 60wt% of macroporous alumina, and 15 to 45% of modified alumina, wherein the silicon aluminum-phosphorus aluminum composite molecular sieve is a composite molecular sieve with silicon aluminum or modified aluminosilicate zeolites serving as a core and a phosphorus aluminum or modified phosphorus aluminum molecular sieve serving as a housing, and has the specific surface area of 250 to 400m<2>/g and pore volume of 0.50 to 0.80cm<3>/g. The carrier is characterized in that the silicon aluminum-phosphorus aluminum composite molecular sieve is introduced to improve the acidity of the carrier and adjust the distribution of hydroxide radicals on the aluminum oxide surface in order to disperse active metal components easily. The carrier is loaded with metallic oxides of VIB group and VIII group for preparing a catalyst, shows outstanding aromatic ring hydrogenation saturation capacity and cracking capacity respecting to C-S and C-N bonds in the hydrotreating process of the wax oil, and is applicable to the catalytic cracking and hydrocracking of raw materials.

Description

technical field [0001] The invention relates to the field of a wax oil hydrogenation pretreatment catalyst carrier, in particular to a preparation method of a wax oil hydrogenation pretreatment catalyst carrier containing a silicon aluminum-phosphorus aluminum composite molecular sieve. technical background [0002] Facing the increasingly heavy and inferior petroleum resources at the border, and the increasingly high-quality and clean petroleum fuel products, the development of efficient conversion of heavy crude oil and clean oil production technology has become the top priority of today's petroleum processing industry. Catalytic cracking and hydrocracking technologies are important technical means to lighten heavy oil. In recent years, the proportion of straight-run gas oil in catalytic cracking and hydrocracking raw materials has gradually decreased, while the proportion of low-quality components such as high-sulfur nitrogen gas oil, vacuum deep-drawing wax oil, coking g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J29/83C10G45/12
Inventor 肖寒杨建国李孝国于海斌朱金剑石芳张国辉李佳
Owner CHINA NAT OFFSHORE OIL CORP
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