Aluminum-silicon-titanium composite oxide carrier and load type catalytic hydro-dearomatization catalyst

A composite oxide, aluminum silicon titanium technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the problem of poor stability, unsatisfactory effect, and unsatisfactory Catalyst long cycle life requirements and other issues, to achieve the effect of simple synthesis conditions and easy control

Active Publication Date: 2008-12-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to obtain a carrier with a large specific surface area and a macroporous structure, many studies have proposed the use of templates. Although the specific surface area and pore structure of the carrier material can be increased, the use of organic particle templates also increases the preparation process. complexity and catalyst cost
In current applications, conventional diesel hydrodearomatization catalysts are based on Al with a large specific surface area 2 o 3 Or molecular sieve is the main catalyst of supporting PtPd. Although it has good dearomatization effect, its stability performance is still very poor, which cannot meet the requirements of long cycle life of catalyst in industrial production; and Al 2 o 3 Or although the catalyst supported by NiW on a molecular sieve also has a certain dearomatization effect, the effect is not ideal, especially it is difficult to remove bicyclic or polycyclic aromatic hydrocarbons, which is one of the main reasons why it is difficult to achieve deep dearomatization.

Method used

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  • Aluminum-silicon-titanium composite oxide carrier and load type catalytic hydro-dearomatization catalyst
  • Aluminum-silicon-titanium composite oxide carrier and load type catalytic hydro-dearomatization catalyst
  • Aluminum-silicon-titanium composite oxide carrier and load type catalytic hydro-dearomatization catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Weigh a certain amount of pseudo-boehmite, make a slurry with absolute ethanol, the mass of absolute ethanol used is 1.0 to 1.3 times the mass of pseudo-boehmite, and then slowly add concentrated Nitric acid until the precipitate disappears and a uniform slurry is formed to obtain an aluminum sol.

[0036] Dissolve deionized water and nitric acid in absolute ethanol in sequence, the molar ratio of water, nitric acid and ethanol is 1:0.3:10 to obtain solution A; weigh a certain amount of Ti(OC 4 h 9 ) 4 Dissolved in ethanol to make titanium sol, Ti(OC 4 h 9 ) 4 The molar ratio with ethanol is 1:5; slowly add a certain mass of tetraethyl orthosilicate into the above-mentioned titanium sol, and continue to stir to make it fully miscible, and record it as B; after stirring A and B for 20 minutes, in At room temperature, pour solution A into a rate-controlled injector, then control the injection rate to 4mL / min, and add it dropwise to B under vigorous stirring, and cont...

Embodiment 2

[0046] Prepare the composite carrier according to the method of Example 1, the difference is that the acid uses adipic acid to prepare Al 2 o 3 -SiO 2 -TiO 2 The BET characterization of the series of composite oxides is similar to the result of Example 1.

[0047] The support is further impregnated with noble metals Pt and Pd to make PtPd / Al 2 o 3 -SiO 2 -TiO 2 series of catalysts.

Embodiment 3

[0049] With embodiment 1 method, synthesized Al 2 o 3 -SiO 2 -TiO 2 After the composite support, equal volumes of PdPt metal components were co-impregnated on the composite support to prepare PtPd / Al 2 o 3 -SiO 2 -TiO 2 In the catalyst, the mass fraction of Pd is 0.3-0.6%, the mass fraction of Pd is 0.1-0.2%, and the order of impregnation is first Pt and then Pd. The preparation method is: the metal salts used are respectively chloroplatinic acid (H 2 PtCl 6 6H 2 O) and palladium chloride (PdCl 2 ), first a certain amount of chloroplatinic acid (H 2 PtCl 6 6H 2 O) and PdCl 2 Dissolve in 0.2mol / L dilute hydrochloric acid to form a co-impregnation solution, and use the co-impregnation method to obtain PtPd / Al 2 o 3 -SiO 2 -TiO 2 For the double noble metal catalyst precursor, after impregnating the metal active component, put the catalyst precursor into an ultrasonic oscillator for ultrasonic dispersion for 20 minutes, then dry it at 110°C for 12 hours, and then ...

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Abstract

The present invention relates to a composite Al2O3-SiO2-TiO2 oxide and a loading type hydrogenation-dearomatization catalyst which is obtained with the composite oxide as a support. The composite oxide support is the composite Al2O3-SiO2-TiO2 oxide which is obtained by assembling and synthesizing an aluminium source, a silicon source and a titanium source by a sol-gel method, the specific surface area of the composite Al2O3-SiO2-TiO2 oxide is 250 to 400m<2> / g, the pore volume is 0.4 to 0.6cm<3> / g, and the aperture is 4 to 10nm. The composite oxide is used as the support to load noble metal and becomes deep hydrogenation-dearomatization catalyst to be used for the hydrogenation-dearomatization treatment of oil, and particularly, the composite oxide shows the stability and the dearomatization activity better than the normal catalyst in the deep hydrogenation-dearomatization reaction of diesel oil.

Description

technical field [0001] The present invention relates to an Al 2 o 3 -SiO 2 -TiO 2 Composite oxide and a supported hydrogenation dearomatization catalyst obtained by using the composite oxide as a carrier. The invention belongs to the technical field of catalysts. Background technique [0002] As the total demand for vehicle fuel increases day by day, the emission of pollutants in vehicle exhaust is also increasing, causing air pollution problems to become more and more serious; at the same time, people's awareness of environmental protection is becoming stronger and stronger . Therefore, the market has increasingly stringent requirements on the quality of petroleum products, and countries all over the world have successively revised strict fuel standards. In the new specification, more stringent requirements are put forward for the sulfur content, aromatic content, density and cetane number of diesel products, especially the stricter requirements for sulfur content and...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/56C10G45/10
Inventor 段爱军黄卫强窦涛赵震万国赋张登前姜桂元
Owner BC P INC CHINA NAT PETROLEUM CORP
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