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Titanium dioxide-aluminum oxide composite carrier and preparation method thereof

A technology of alumina carrier and composite carrier, applied in catalyst activation/preparation, catalyst carrier, chemical instrument and method, etc., can solve problems such as unfavorable macromolecular diffusion, affecting reaction rate, small average pore size, etc.

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

As obtained titania-alumina support in embodiment 7, its specific surface is 420.31m 2 / g, the pore volume is 0.7501ml / g, thus its average pore diameter is 7.1nm, the average pore diameter of the carrier is small, which is not conducive to the diffusion of macromolecules in the raw material, thus affecting the reaction rate and even affecting the Impurity removal rate

Method used

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  • Titanium dioxide-aluminum oxide composite carrier and preparation method thereof
  • Titanium dioxide-aluminum oxide composite carrier and preparation method thereof
  • Titanium dioxide-aluminum oxide composite carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052]Under stirring conditions, 375g 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 . 96g of titanium tetrachloride was added to 200g of ethanol, added dropwise to the micelles, and then reacted in a closed manner at 100°C for 3 hours to obtain nanometer titanium hydroxide-aluminum hydroxide gel. Wash three times with 200ml of distilled water, and dry at 120°C for 10 hours. Mix 160g of nano-titanium hydroxide-aluminum hydroxide gel dry powder with 40g of binder pseudo-boehmite; mix 2.6g of dilute nitric acid (mass concentration 17%), 60g of water and 10g of cosolvent ethanol, and stir Evenly, mix evenly on the mixer, and then shape it in the extruder, and control the pressure at 10MPa. The formed product was dried at 100°C for 10 hours, calcined at 240°C for 3 hours, and cal...

Embodiment 2

[0054] The titania-alumina carrier TA1 obtained in Example 1 is impregnated with active metals, and the resulting residue hydrodesulfurization catalyst HDS-1 contains 14% (mass fraction) MoO 3 , 4% (mass fraction) NiO.

[0055] The residual oil hydrodesulfurization catalyst HDS-1 was used in the hydrodesulfurization experiment of residual oil raw material (properties are shown in Table 2). The test conditions are shown in Table 3 and the test results are shown in Table 4.

Embodiment 3

[0061] Change the forming method of Example 1 to the tableting method, and the process is as follows: put the dry powder of nano-titanium hydroxide-aluminum hydroxide gel and 12 g of carbon black into the tablet press, and press the tablet under the condition of a pressure of 0.08 MPa. forming. The molded product was dried at 120°C for 8 hours, calcined at 260°C for 3 hours, and calcined at 750°C for 4 hours, wherein the heating rate was 4°C / min to obtain the titania-alumina carrier TA2 of the present invention.

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Abstract

The invention discloses a titanium dioxide-aluminum oxide composite carrier and a preparation method thereof. Titanium hydroxide-aluminum hydroxide gel prepared by supersolubility micelles is used as a raw material, and the gel contains a surfactant and a hydrocarbon substance, so after the gel is molded and roasted, nanometer titanium dioxide and aluminum oxide particles formed by removing water from polymerized titanium hydroxide and aluminum hydroxide still have a rodlike basic structure and accumulate unorderly to form a frame structure. The composite carrier has the advantages of large pore volume, large pore diameter, high porosity, large orifices on the external surface, and high penetrability of pore channel; and particularly for macromolecules, a catalyst does not have ink bottle-shaped orifices, so the orifices cannot be blocked so as not to inactivate the catalyst. The composite carrier is favorable for increasing the sediment accumulation of impurities and prolonging the running period of the catalyst. The composite carrier can be used for catalytic reaction of macromolecular reactants or products.

Description

technical field [0001] The invention relates to a titanium oxide-alumina composite carrier and a preparation method thereof, in particular to a large-pore-volume titanium oxide-alumina catalyst carrier for residual oil hydrodesulfurization, hydrodenitrogenation, and hydrogenation carbon removal Composite carrier and its preparation method. 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 requirements for product quality have 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 mor...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04B01J21/06B01J35/02B01J37/00B01J37/08C10G45/04
Inventor 王鼎聪刘纪端陈金汤
Owner CHINA PETROLEUM & CHEM CORP
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