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A method for preparing titanium oxide-alumina composite and its application

A composite and titanium oxide technology, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as unobtainable and difficult to control pore distribution, and achieve good results. The effect of hydrodesulfurization rate, improvement of mass transfer and heat transfer efficiency, and mild reaction conditions

Active Publication Date: 2017-09-29
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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  • A method for preparing titanium oxide-alumina composite and its application
  • A method for preparing titanium oxide-alumina composite and its application
  • A method for preparing titanium oxide-alumina composite and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take analytically pure AlCl 3 ·6H 2 O201.3g was dissolved in 1000ml of deionized water to prepare solution A 1 ; Take chemically pure Ti(OCH 2 CH 3 ) 4 21.7g, dissolved in 500ml of benzene (benzene content is 99.8(Wt)%) 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 .

[0034] 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 incre...

Embodiment 2

[0036] 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 ; Take chemically pure Ti(OCH 2 CH 3 ) 4 21.4g, dissolved in 500ml benzene (benzene content is 99.8(Wt)%), to obtain solution B 2 , to replace B in Example 1 1 . As a result, 42.4 g of titanium oxide-alumina composite Z 2 , and its structure and performance results are shown in Table 1.

Embodiment 3

[0038] Repeat the experimental process in embodiment 1, difference is, get analytical pure AlCl 3 ·6H 2 O2 35.8g, dissolved in 1000ml deionized water to obtain solution A 3 , to replace A in Example 1 1 ; Take chemically pure Ti(OCH 2 CH 3 ) 4 0.7g, dissolved in 500ml benzene (benzene content is 99.8(Wt)%), to obtain solution B 3 , to replace B in Example 1 1 . As a result, 42.5 g of titanium oxide-alumina composite Z 3 , and its structure and performance results are shown in Table 1.

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Abstract

The invention provides a method for preparing a titanium oxide-alumina composite, comprising: step I: dissolving soluble aluminum salt in water to obtain solution A; dissolving tetraethyl titanate in benzene to obtain solution B; Ammonium bicarbonate and ammonia are mixed into mixed ammonium aqueous solution C; and step II: at a temperature of 65-95°C, three solutions of solutions A, B and C are co-currently precipitated, and by controlling the flow rate of solution C, solution A, The pH value of the mixed solution of B and C appears alternately in two ranges of 5.0-6.5 and 8.0-9.5, and stays for 6-10min respectively to obtain a precipitate; step III, roasting the precipitate to obtain the complex . In the application of the titanium oxide-alumina composite of the present invention as a carrier in the hydrodesulfurization reaction of pyrolysis gasoline, the catalyst has high low-temperature activity, high hydrogenation conversion rate, and the hydrodesulfurization rate can reach 99.9%.

Description

technical field [0001] The invention relates to the field of inorganic composite materials, in particular to a preparation method and application of a titanium oxide-alumina composite. 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 catalytic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J32/00B01J23/882B01J23/883C10G45/08
Inventor 任玉梅柴忠义杜周纪玉国张富春季静
Owner CHINA PETROLEUM & CHEM CORP