Preparation method of TiO2/gamma-Al2O3 composite carrier material

A composite carrier and carrier technology, which is applied in the direction of catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of limited development and application, complicated preparation process, and few surface active sites, and achieve good hydrodesulfurization performance , The preparation method is simple, and the effect that meets the production needs

Active Publication Date: 2014-04-09
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But ordinary TiO 2 Carriers have disadvantages such as low specific surface area, poor stability, few surface active sites, difficult molding, and high cost.
Numerous researchers will nano-TiO 2 with Al 2 o 3 For compounding, the preparation process usually adopts tetrabutyl

Method used

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  • Preparation method of TiO2/gamma-Al2O3 composite carrier material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Incorporation of 30wt% mesoporous TiO in aluminum sol 2 Whiskers (converted according to alumina dry material, with a diameter of 0.1-1μm, an aspect ratio of 2-20, and a specific surface area of ​​118m 2 / g, pore volume 0.39ml / g), add 15 times the dry weight (TiO 2 with Al 2 o 3 The sum of mass) of deionized water, mix well; heat to 80 ℃, drop HNO 3 Adjust the pH to 2 and keep it warm for 24 hours; add ammonia water dropwise to adjust the pH of the system to 9 to form Ti-Al-H 2 O composite jelly; after aging for 2 hours, wash with deionized water and filter until neutral, dry in the air, and put it into a muffle furnace for roasting at 500°C to obtain TiO 2 TiO with a whisker content of 30 wt% 2 / γ-Al 2 o 3 Composite carrier material.

[0020] The above-mentioned composite support material is impregnated with a molybdenum-nickel salt solution to prepare a molybdenum-nickel catalyst, wherein MoO 3 , NiO loadings were 30wt% and 7.8wt% of the mass of the catalyst,...

Embodiment 2

[0022] Add 2wt% sodium carboxymethylcellulose and 1wt% citric acid to the material in Example 1, filter and dry it, knead it evenly, extrude it, put it into a muffle furnace for roasting at 500°C, and obtain TiO 2 TiO with a whisker content of 30 wt% 2 / γ-Al 2 o 3 Composite molding carrier. The preparation and hydrodesulfurization performance of the catalyst were evaluated according to the conditions in Example 1.

[0023] The above-mentioned catalyst can reduce the sulfur content in FCC diesel with a sulfur content of 5600 μg / g to 48 μg / g.

[0024] The preparation methods of Examples 3-5 and Comparative Examples are the same as those of Examples 1 and 2, and the parameters and performance evaluation of hydrodesulfurization are shown in the appendix.

[0025]

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Abstract

The invention relates to a preparation method of a TiO2/gamma-Al2O3 composite carrier material. The method includes uniformly mixing mesoporous TiO2 crystal whisker and alumina sol, with the weight percent of the mesoporous TiO2 crystal whisker being 2-50 wt% and the weight ratio of dry mixing materials to water being 1:5-20; heating the material mixture to 60-90 DEG C, adding dropwise an inorganic acid to adjust the pH to be 2-3.5 and maintaining for 2-24 h; adding dropwise an alkaline solution to adjust the pH to be 9 to form Ti-Al-H2O composite jelly; ageing for 1-6 h, washing with deionized water to be neutral, filtering and drying in air; and calcining at 500-800 DEG C to obtain the TiO2/gamma-Al2O3 composite carrier material. The method is simple in operation and low in cost. A molybdenum-nickel catalyst prepared from the carrier has excellent deep hydrodesulfurization performance, and is capable of reducing the sulfur content from 5000 [mu]g/g in inferior diesel oil to below 50 [mu]g/g, thus achieving the Europe IV diesel oil standard.

Description

technical field [0001] The invention relates to a catalyst carrier material used for hydrotreating petroleum fractions. Background technique [0002] With the rapid economic growth, my country's diesel demand is increasing at a rate of 5% to 6% per year, and in recent years some imported crude oil has a high content of sulfur impurities. Under the severe environmental situation, some countries and regions have put forward corresponding environmental regulations. For example, the European Union has successively formulated and implemented strict diesel emission standards such as Euro III, Euro IV, and Euro V. China has also successively formulated the National III , National IV diesel standard. [0003] Hydrodesulfurization technology is the main means to reduce the sulfur content in petroleum fractions, and its desulfurization effect largely depends on the catalytic activity of the catalyst used in the hydrodesulfurization process. Although there are many kinds of hydrodesu...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/06B01J23/883C10G45/08
Inventor 杨祝红温广明蔡鹤飞褚洪岭陆小华王元琪李力成张文成蔡海军岳树江郭伟陈凯郭金涛赵野常玉红王丹李瑞峰方磊徐伟池唐成苗丽娜周清华
Owner PETROCHINA CO LTD
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