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Titanium-contained aluminum oxide carrier and preparation method thereof

A technology of alumina carrier and titanium alumina, which is applied in the direction of catalyst carrier, chemical instrument and method, catalyst activation/preparation, etc., can solve the problems of poor mechanical strength, small specific surface area, weak acidity, etc., so as to prolong the operation period and increase Good deposition rate and good channel penetration

Active Publication Date: 2010-11-24
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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  • Titanium-contained aluminum oxide carrier and preparation method thereof
  • Titanium-contained aluminum oxide carrier and preparation method thereof
  • Titanium-contained aluminum oxide carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Under stirring conditions, 750g of aluminum nitrate nonahydrate and 90g of urea were mixed and heated to 100°C, and added to a mixture of 32g of polyisobutylene maleate triethanolamine maleate and 88g of 150HVI neutral oil at the same temperature to form supersolubilizing micelles , and then reacted at 100°C for 3 hours to obtain nano-aluminum hydroxide gel. Wash three times with 200ml of distilled water, add 35ml of metatitanic acid suspension with a solid content of 200g / L and mix evenly, and dry the solid phase obtained after separation at 120°C for 10 hours. Mix 70g of titanium-containing nano-aluminum hydroxide gel dry powder with 30g of macroporous alumina, mix 6g of acetic acid, 60g of water and 5g of ethanol, and mix the above two mixtures evenly, and then shape them in an extruder. The pressure is at 30MPa. The molded product was dried at 130°C for 10 hours, calcined at 200°C for 3 hours, and then calcined at 750°C for 20 hours with a heating rate of 5°C / min t...

Embodiment 2

[0047] The titanium-containing alumina carrier TA1 obtained in Example 1 is impregnated with active metals, and the resulting residue hydrodenitrogenation catalyst HDN-1 contains 18% (mass fraction) MoO 3 , 6% (mass fraction) NiO.

[0048] The residual oil hydrodenitrogenation catalyst HDN-1 was used in the hydrodenitrogenation experiment of the residual oil raw material (see Table 1 for properties), and the test conditions were as follows: reaction temperature 390°C, hydrogen-to-oil volume ratio 1000, liquid hourly volume space velocity 1.0h -1 , hydrogen partial pressure 15.4MPa, continuous operation for 200 hours.

Embodiment 3

[0055] Mix 90g minus three-line dewaxed oil and 70g SP-80, heat to dissolve at 80°C, and mix well; heat 750g of aluminum nitrate nonahydrate to 80°C to melt, slowly add to the above mixture, and mix for 20 minutes to form a uniform supersolubilized colloid. 320 g of saturated ammonia water at 20° C. was added dropwise and aged for 3 hours to obtain a nano-aluminum hydroxide gel. Wash three times with 200ml of distilled water, add 100ml of metatitanic acid suspension with a solid content of 200g / L and mix well, and dry the solid phase obtained by separation at 120°C for 10 hours. Mix 90g of titanium-containing nano-aluminum hydroxide gel dry powder with 10g of binder pseudo-boehmite; mix 2g of dilute nitric acid (mass concentration 17%), 15g of water and 25g of cosolvent ethanol, and mix the above two The mixture is uniformly mixed on a mixer, and then shaped in an extruder, and the pressure is controlled at 20MPa. The molded product was dried at 110°C for 15 hours, calcined a...

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Abstract

The invention discloses a titanium-contained aluminum oxide carrier and a preparation method thereof. The preparation method comprises the following steps: adopting aluminium hydroxide gel prepared by a fused salt supersolubilizing micelle method as a raw material, adding titanium-contained seriflux, moulding, drying and baking to obtain the carrier. In the preparation process, thanks to surfactants and hydrocarbon components contained in the aluminium hydroxide gel, the moulded and baked carrier contains clavate nano aluminum oxide which is randomly piled up to develop a frame structure; and moreover, the adoption of the titanium-contained seriflux does not destroy the perfoliate pore canal of the clavate nano aluminum oxide and has weak interaction with the aluminum oxide carrier, thereby facilitating macromolecule substance to diffuse on a titanium oxide surface for reaction. The titanium-contained aluminum oxide carrier of the invention has the advantages of big pore volume, big pore diameter, high porosity, bigger orifice of outer surface and sound penetrability of the pore canal, facilitates increasing impurity deposition, and prolongs running period of catalysts.

Description

technical field [0001] The invention relates to a titanium-containing alumina carrier and a preparation method thereof, in particular to a titanium-containing alumina carrier used as a catalyst for desulfurization, denitrogenation and residual carbon removal in residual oil hydrotreating and a preparation method thereof. Background technique [0002] So far, the catalyst carrier used in the fixed bed of residual oil is still the classic alumina carrier. High-temperature roasting method, pH value swing method and steam treatment can all obtain macroporous alumina suitable for residual oil, the pore volume of which is concentrated at 8-15nm accounts for more than 80%, and the catalyst has a high initial activity. The pores of macroporous alumina are continuous through the residual oil molecules, but the pores are too concentrated at about 10nm to 20nm, which is not conducive to the long-term operation of the catalyst. The blockage of the catalyst bed caused the shutdown of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J32/00B01J35/10B01J37/00C10G45/04
Inventor 王鼎聪刘纪端
Owner CHINA PETROLEUM & CHEM CORP
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