Modified aluminium oxide carrier, hydrogenation catalyst prepared thereby and preparation method

An alumina carrier, hydrogenation catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low dispersion of active metals, alumina The problems such as irregular crystal structure of the carrier can control and improve the crystal structure, good surface properties and thermal stability, and improve the desulfurization efficiency.

Active Publication Date: 2009-12-02
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to overcome the defects of low dispersion of active metals on the carrier and irregular crystal structure of the alumina carrier in the prior art, and provide a modified oxidation catalyst with high dispersion of the supported active me...

Method used

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preparation example Construction

[0036] Preparation process of modified alumina carrier

[0037] In a specific embodiment of the present invention, a fluorocarbon surfactant is added to the alumina support during the modification process so as to introduce fluorine on the surface of the support. The specific preparation process is as follows:

[0038] a) After mixing alumina and / or alumina precursor, peptizing agent and extrusion aid, and adding an appropriate amount of water, knead into a paste.

[0039] Wherein, the alumina precursor refers to a mixture of one or more hydrated oxides capable of producing alumina after roasting, and may be one or more of pseudo-boehmite, boehmite, and SB powder. Peptizer and extrusion aid can adopt any commercially available routine product, preferably easy to get and cheap silica sol as peptizer in the present invention, squash powder is as extrusion aid, suitable peptizer, extrusion aid can be used as modifying agent Improve the thermal stability activity and mechanical ...

Embodiment 1

[0055] Embodiment 1 prepares catalyst carrier Z1

[0056] Weigh 100g of pseudo-boehmite (72w% on a dry basis), add 60ml of 2% nitric acid aqueous solution, 20g of silica sol, and 5g of scallop powder, mix, and knead into a paste. 2.6g perfluoroalkyl ethoxy ether alcohol [RFH 2 CH 2 (OC 2 h 4 ) 8 OH] was added to 30ml of aqueous solution containing 2% phosphoric acid, stirred and dissolved, the solution was kneaded with the above paste, and extruded into strips. Soak the molded object in 30ml of ethylenediamine for 2 hours, then take out the molded object and bake it at 161°C for 2 hours, and at 600°C for 3 hours, with a heating rate of 4°C / min before each constant temperature. Vector Z1 is obtained. Its physical and chemical properties are listed in Table 1.

Embodiment 2

[0057] Embodiment 2 prepares catalyst carrier Z2

[0058] Weigh 100g of pseudo-boehmite (72w% on a dry basis), add 60ml of 2% nitric acid aqueous solution, 20g of silica sol, and 5g of scallop powder, mix, and knead into a paste. 0.18g perfluorobutylsulfonyl fluoride (C 4 f 9 SO 2 F) Add 20 ml of 3% phosphoric acid aqueous solution, stir to dissolve, knead the solution with the above paste, and extrude to shape. Soak the molding in 30ml of ethylenediamine for 2 hours, then take out the molding and bake at 360°C for 1.5 hours, and at 700°C for 2 hours, the heating rate before each constant temperature is 6°C / min. Vector Z2 is obtained. Its physical and chemical properties are listed in Table 1.

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PUM

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Abstract

The invention relates to a hydrogenation catalyst, comprising a modified aluminium oxide carrier and an active metal; wherein, the carrier is obtained by adding fluorocarbon surfactant into aluminium oxide and/or an aluminium oxide precursor for modification. The preparation method of the hydrogenation catalyst comprises the following steps: mixing the aluminium oxide and/or aluminium oxide precursor and a peptizing agent, adding water of moderate amount and kneading into a paste; adding fluorocarbon surfactant and inorganic acid into the paste, kneading and molding to obtain a molding product; baking the molding product in multiple stages to obtain the modified aluminium oxide carrier; dipping the modified aluminium oxide carrier into a stabilized solution which contains one or more of the VIII group metals and one or more of the VIB group metal compounds for once or a plurality of times; drying and baking to obtain the product. The hydrogenation catalyst prepared by the method is characterized by large pore diameter, pore distribution concentration, moderate acid amount and high dispersion degree of active metal.

Description

technical field [0001] The invention belongs to the field of hydrogenation catalysts, in particular to a modified alumina carrier used for hydrogenation treatment of diesel fractions, a hydrogenation catalyst made from the carrier and a preparation method thereof. Background technique [0002] In recent years, with the reduction of world oil reserves, the trend of heavy crude oil and increasing sulfur content has become increasingly obvious. In order to make full use of limited resources, the oil refining industry needs more effective sulfur removal technology, among which hydrogenation technology is to produce clean fuel , One of the effective measures to reduce environmental pollution, so the development of hydrogenation catalysts with high activity and selectivity has received widespread attention. At present, the hydrogenation catalysts commonly used in industry are composed of alumina, silicon-containing alumina and their modified products as supports and metal active c...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04B01J23/883C10G45/08
Inventor 田志坚蒲延芳徐云鹏曲炜闻学兵
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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