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Titanium oxide-aluminum oxide compound as well as preparation method and application thereof

A composite and titanium oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems that the pore distribution is difficult to control and cannot be obtained, and achieve low temperature High activity, extended activity period, and simple process

Active Publication Date: 2014-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore distribution of the titania-alumina composite is difficult to control, and a titania-alumina composite with a suitable pore distribution cannot be obtained.

Method used

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  • Titanium oxide-aluminum oxide compound as well as preparation method and application thereof
  • Titanium oxide-aluminum oxide compound as well as preparation method and application thereof
  • Titanium oxide-aluminum oxide compound as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take analytically pure AlCl 3 ·6H 2 O 201.3g, dissolved in 1000ml of deionized water to prepare solution A 1 ; Take chemically pure Ti(SO 4 ) 2 22.5g, dissolved in 500ml of deionized water to prepare solution B 1 ; Take analytically pure NH 4 HCO 318g, dissolve in 600ml of deionized water, add 250ml of ammonia water with a concentration of 24-28wt%, stir and mix evenly, then add deionized water to prepare 1000ml of solution C 1 .

[0037] Under the condition of normal pressure and temperature of 70-75℃, A 1 , B 1 and C 1 The three solutions were co-precipitated in parallel. control solution C 1 flow rate, keep the pH value of the precipitate in the range of 5.0-6.0 for 8 minutes, then increase the solution C 1 flow rate, keep the pH value of the mixed solution in the range of 8.5-9.5 for 8 minutes, then reduce the solution C 1 flow rate, keep the pH value of the mixed solution in the range of 5.0-6.0 for 8 minutes, then increase the solution C 1 flow, so t...

Embodiment 2

[0039] Repeat the experimental process in Example 1, the difference is, get analytically pure Al 2 (SO 4 ) 3 18H 2 O sample 277.6g was dissolved in 1000ml deionized water to obtain solution A 2 , to replace A in Example 1 1 . As a result, 48.6 g of titanium oxide-alumina composite P 2 , and its structure and performance results are shown in Table 1.

Embodiment 3

[0041] Repeat the experimental process in embodiment 1, difference is, get analytical pure AlCl 3 ·6H 2 O2 35.7g, dissolved in 1000ml deionized water to obtain solution A 3 , to replace A in Example 1 1 ; Take chemically pure Ti(SO 4 ) 2 0.75g, dissolved in 300ml deionized water to obtain solution B 3 , to replace B in Example 1 1 . As a result, 48.8 g of titanium oxide-alumina composite P 3 , and its structure and performance results are shown in Table 1.

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Abstract

The invention provides a titanium oxide-aluminum oxide compound, which comprises 0.3-25 wt% of titanium oxide based on the compound, wherein, the compound is distributed in diplopore channel. In the compound, preferably diameters of 30-50% of apertures are 20-40 angstrom, furtherly, diameters of 30-50% of apertures are 80-130 angstrom. The invention also provides a preparation method of titanium oxide-aluminum oxide compound, and the diplopore channel compound is obtained by controlling the pH value of the reaction solution to alternatively stay within two scopes for a certain time. In addition, the invention also provides an application of the titanium oxide-aluminum oxide compound as a catalyst carrier. A catalyst using the titanium oxide-aluminum oxide compound of the present invention as a carrier can be applied to pyrolysis gasoline hydrodesulfurization reaction, and the catalyst has the advantages of high low temperature activity and high hydrogenation conversion rate, and the hydrodesulfurization rate can reach to 99.9%.

Description

technical field [0001] The invention relates to the field of inorganic composite materials, in particular to a titanium oxide-alumina composite and its preparation method and application. Background technique [0002] Titanium oxide and aluminum oxide are commonly used support materials for chemical reaction catalysts. Compared with traditional alumina as a carrier alone, titanium oxide has a smaller specific surface area (BET specific surface area is about 50m 2 / g), poor mechanical strength (approximately γ-Al 2 o 3 One-fifth of), poor thermal stability. Titanium oxide-alumina composite support, which not only keeps Al 2 o 3 The carrier has the advantages of high specific surface area, high strength and good thermal stability, and has the advantages of TiO 2 unique performance. At the same time, after the carrier is modified by adding titanium oxide, the structure and properties of the active phase of the catalyst will also be affected, thereby improving the catalyt...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J32/00B01J35/10B01J23/882C10G45/08
Inventor 任玉梅柴忠义杜周纪玉国张富春季静
Owner CHINA PETROLEUM & CHEM CORP
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