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Ultra-fine titanium aluminum composite oxide and preparation method thereof

A composite oxide, composite hydroxide technology, applied in chemical instruments and methods, chemical/physical processes, catalyst supports, etc., can solve the problem of small specific surface area, difficult to widely use, and the active anatase type is not stable enough And other issues

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the specific surface area is relatively small, generally not more than 100m 2 / g; the active anatase type is not stable enough at high temperature and tends to become an inert rutile structure; poor mechanical strength and weak acidity make it difficult to be widely used in industry

Method used

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  • Ultra-fine titanium aluminum composite oxide and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0055] Heat and melt 480g of aluminum nitrate nonahydrate, 18g of titanium tetrafluoride, 192g of urea and 34g of ethanol, drop into a mixture of 207g of 50°C minus four-line distillate and 55g of T-154 bis-succinimide and mix evenly. Then add 14g tetraethylenepentamine and mix well. Under airtight conditions, at a temperature of 150°C, the temperature and pressure were maintained, and the reaction was carried out for 3 hours. After the reaction, wash once with ethanol, then wash with distilled water until there is no negative ion, and centrifuge. Finally, dry at 100°C for 20 hours, then bake at 250°C for 2 hours in air, and finally bake at 550°C for 10 hours to obtain the ultrafine titanium-aluminum composite oxide of the present invention. The obtained ultrafine titanium-aluminum composite oxide has an average particle size of 85nm and a specific surface area of ​​287m 2 / g, pore volume 0.920ml / g, average pore diameter 12nm, pore volume with a pore diameter of 4nm-20nm acc...

Embodiment 2

[0057] Heat 248g of aluminum isopropoxide, 247g of titanium tetraiodide and 98g of ethanol to 90°C to melt, drop into a mixture of 178g of minus-line distillate and 48g of polyethylene propylene glycol maleate at 90°C, and then drop into 200g ammonia water (weight concentration 50wt%), finally add 40g 1,6-hexamethylenediamine and mix evenly. Wash with distilled water until there is no negative ion, and centrifuge. Dry at 105°C for 16 hours, then bake at 250°C for 2 hours, and finally bake at 550°C for 10 hours to obtain the ultrafine titanium-aluminum composite oxide of the present invention. The average particle size of ultra-fine titanium-aluminum composite oxide is 70nm, and the specific surface area is 265m 2 / g, pore volume 0.68ml / g, average pore diameter 9nm, pore volume with a pore diameter of 4nm-20nm accounts for 86% of the total pore volume, TiO 2 with Al 2 o 3 The molar ratio is 40:60.

Embodiment 3

[0059] Heat and melt 37g of titanium tetrabromide, 675g of aluminum nitrate nonahydrate and 450g of isobutanol, and drop them into a mixture of 65g of second-line distillate oil and 15g of fatty acid monoglyceride at 75°C. Then drop the mixed solution of 40g hexamethylenetetramine and 10g water and mix evenly. Under airtight conditions, feed 120g of liquid ammonia, then raise the temperature to 120°C, keep the temperature and pressure, and react for 3 hours. After the reaction, wash once with ethanol, then wash with distilled water until there is no negative ion, and centrifuge. Finally, dry at 100°C for 20 hours, then bake at 250°C for 2 hours, and finally bake at 550°C for 10 hours to obtain the ultrafine titanium-aluminum composite oxide of the present invention. The obtained ultrafine titanium-aluminum composite oxide has an average particle size of 67nm and a specific surface area of ​​295m 2 / g, pore volume 0.97ml / g, pore diameter 13nm, pore volume with a pore diameter...

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Abstract

The invention discloses ultrafine titanium-aluminum composite oxide and a preparation method thereof. The method comprises the following steps: aluminum salt and titanium salt are dropped into the mixture of hydrocarbon component and surfactant with the VB value less than 1 to form an ultra solubilization micellar system, so as to react under the existence of precipitant and or catalyst; and the obtained reaction product is baked and / or roasted to obtain the ultrafine titanium-aluminum composite oxide. The titanium-aluminum composite oxide hole has a more rational structure, the pore volume with the hole diameter of 4 nm to 20 nm occupies 75 percent to 95 percent of the whole pore volume, thereby being favorable for improving the selectivity and the activity of the catalyst. The amount of the surfactant and the hydrocarbon component used for the method is little, the cost is low, the ultrafine particles are in a single dispersed state, the process is simple, and the invention can be used for the mass industrial production.

Description

technical field [0001] The invention relates to a titanium-aluminum composite oxide and a preparation method thereof, in particular to a composite of ultrafine titanium oxide and aluminum oxide and a preparation method thereof, and is particularly suitable for being used as a carrier of a hydrogenation catalyst. Background technique [0002] As an important process in petroleum refining and synthetic ammonia production using petroleum as raw material, hydrodesulfurization has always been valued by people. However, in recent years, the quality of petroleum has become heavier and worse, while the quality of products has become more stringent, and the requirements for feed materials in subsequent processes have become more and more stringent. In addition, since mankind entered the 21st century, people's awareness of environmental protection has been continuously enhanced, and environmental protection legislation has become more and more stringent. x , SO x And the restriction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/04B01J32/00
Inventor 王鼎聪刘纪端孙万富杨刚赵愉生王永林付秋红
Owner CHINA PETROLEUM & CHEM CORP
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