Preparation method of TiO2/Al2O3 composite carrier

A technology of composite carrier and powder, applied in catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve problems such as limitation of TiO2 doping amount, and achieve the effect of concentrated pore size distribution

Inactive Publication Date: 2013-02-13
SHAANXI HI TECH ENERGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO prepared by such traditional methods 2 / Al 2 o 3 Composite support makes TiO 2 The incorporation is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take 1 mol of aluminum nitrate and stir it to make it fully dissolved in twice distilled water, add 0.5 mol of dodecylamine in the solution as a template agent, adjust the pH value of the solution with ammonia water, stir well, and heat treat to obtain γ-Al 2 o 3 powder.

[0013] First dissolve butyl titanate in absolute ethanol, stir and add glacial acetic acid as an inhibitor to make it react with butyl titanate to form a chelate, so that butyl titanate is evenly hydrolyzed and the agglomeration of hydrolyzed products is reduced , to obtain a fine and uniform colloidal solution. Add dodecylamine as a template to the absolute ethanol solution of butyl titanate, and add a small amount of aluminum isopropoxide to increase the stability of the sample skeleton structure, and then add deionized water to the sol to make the colloidal particles Form an open skeleton structure. At the same time, slowly add the prepared γ-Al in different proportions 2 o 3 Powders and sols ...

Embodiment 2

[0015] Will (NH 4 ) 6 MO 7 o 24 4H 2 O and (NH 4 ) 2 HPO 4 The mixed solution was added to the TiO 2 , Al 2 o 3 , the TiO prepared in Example 1 2 / Al 2 o 3 Among the three carriers, impregnated, evaporated, dried, and calcined, the MoPO X Catalyst precursors that are active components. Then, in H 2 In the stream, the temperature was programmed to 600 °C for 4 h, and then cooled to room temperature, in 0.5% O 2 N 2 Passivation in flow for 2 h yielded MoP catalysts supported on three different supports for subsequent reactions. Ni is added as an auxiliary agent by impregnation. MoO 3 and NiO 2 The loadings are 18% and 5%, respectively. The evaluation of catalytic performance was carried out on a continuous hydrogenation microreactor with a catalyst loading of 10 mL, and the feed oil was catalytically cracked light gasoline. The reaction conditions are: reaction temperature 100-180°C, reaction pressure 2 MPa, volumetric space velocity 3 h -1 , The volume rat...

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PUM

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Abstract

The invention relates to a preparation method of a TiO2/Al2O3 composite carrier, which relates to a preparation method of a general carrier of a catalyst. The preparation method of the TiO2/Al2O3 composite carrier comprises the following steps of: firstly, dissolving butyl titanate in absolute ethyl alcohol; stirring the solution, and adding glacial acetic acid to the solution; standing the solution, then adding deionized water into the solution, and then carrying out heat treatment on the solution; and after the deionized water is added to the solution, slowly adding gamma-Al2O3 powder to the solution, and then performing heat treatment on the solution. The TiO2/Al2O3 composite carrier prepared through the method has large specific surface area and pore volume and can ensure that pore diameter distribution is more concentrated; and TiO2 in the TiO2/Al2O3 composite carrier is not subjected to a local concentration phenomenon and is greatly uniformly dispersed on the surface of Al2O3.

Description

technical field [0001] The invention relates to a method for preparing a general carrier of a catalyst. Background technique [0002] The preparation of catalysts with binary oxides as composite supports has two purposes, one is to combine the advantages of both, and the other is to seek new properties after interaction, TiO 2 / Al 2 o 3 Composite carrier takes into account Al 2 o 3 and TiO 2 The catalytic properties of TiO make up the 2 The disadvantages of small specific surface area and poor mechanical strength, while retaining TiO 2 The ability of anti-coking and anti-poisoning, the combination of the two can also produce unique physical and chemical properties that individual oxides do not have. [0003] TiO 2 / Al 2 o 3 The composite carrier can be prepared by precipitation method, co-precipitation method, sol-gel method. However, TiO prepared by such traditional methods 2 / Al 2 o 3 Composite support makes TiO 2 The amount of incorporation is limited. Ka...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/06B01J27/19
Inventor 王耀斌
Owner SHAANXI HI TECH ENERGY DEV
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