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Hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, preparation of organic compounds, catalysts for physical/chemical processes, etc., can solve the problems of low strength, poor toughness of porous ceramics, easy brittle cracking, etc., and improve fracture toughness. and strength, the preparation process is simple, and the effect of improving the hydrogenation performance

Active Publication Date: 2013-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] TiO prepared by prior art 2 Catalysts supported by porous ceramics have been well applied in flue gas denitrification and selective hydrogenation of C3 fractions, but they are not suitable for direct use in the hydrotreating of crude terephthalic acid. The main disadvantages are as follows: (1) TiO 2 Porous ceramics have poor toughness and low strength, and catalysts prepared using them as carriers are prone to brittle cracking and collapse in high-temperature and high-pressure aqueous phase environments; (2) active components are easy to lose

Method used

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  • Hydrogenation catalyst and preparation method thereof

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preparation example Construction

[0040] According to the present invention, provided with TiO 2 The preparation method of the hydrogenation catalyst supported by porous ceramics comprises the following steps:

[0041] (1) Will ①TiO 2 Powder, ②pore-forming agent, ③modifier, and ④dilute nitric acid are contacted to obtain a contact product;

[0042] (2) extruding the contact product to obtain a shaped product;

[0043] (3) Roasting shaped products to obtain TiO 2 porous ceramic carrier;

[0044] (4) the TiO obtained in step (3) 2 The porous ceramic support contacts the phenolic resin solution and dries to obtain the TiO modified on the surface of the phenolic resin 2 porous ceramic carrier;

[0045] (5) the modified TiO obtained in step (4) 2 The porous ceramic support contacts the solution containing the Pd compound, so that the palladium-containing compound is supported on TiO 2 On a porous ceramic carrier, a catalyst precursor is obtained;

[0046] (6) The catalyst precursor obtained in step (5) is ...

Embodiment 1

[0061] (1) Will ①TiO 2 100 parts of powder, ②15 parts of pore-forming agent methylcellulose, ③Modifier ZrO 2 10 parts, ④ 40 parts of dilute nitric acid with a concentration of 10% are mixed and kneaded evenly; the kneaded material is extruded and cut into strips of 5-6 mm; the strips are obtained by drying at 120°C and roasting at 1250°C for 4 hours TiO 2 porous ceramic carrier;

[0062] (2) Add 10 parts of phenolic resin to 40 parts of absolute ethanol, stir for 1 hour to obtain a uniform and transparent solution;

[0063] (3) TiO obtained in step (1) 2 The porous ceramic carrier is impregnated with the solution obtained in step (2), and the impregnation time is 5h; the TiO with phenolic resin surface modification is obtained by drying at 100°C. 2 porous ceramic carrier;

[0064] (4) the TiO obtained in step (3) 2 The porous ceramic support is impregnated with a solution containing palladium chloride, so that palladium chloride is loaded on TiO 2 On a porous ceramic ca...

Embodiment 2

[0068] (1) Will ①TiO 2 100 parts of powder, ②5 parts of pore-forming agent carbon fiber, ③Modifier ZrO 2 5 parts, ④ 50 parts of dilute nitric acid with a concentration of 5% are mixed and kneaded evenly; the kneaded material is extruded and cut into strips of 5-6 mm; the strips are dried at 120°C and roasted at 900°C for 4 hours to obtain TiO 2 porous ceramic carrier;

[0069] (2) Add 10 parts of phenolic resin to 50 parts of absolute ethanol, stir for 1 hour to obtain a uniform and transparent solution;

[0070] (3) TiO obtained in step (1) 2 The porous ceramic carrier is impregnated with the solution obtained in step (2), and the impregnation time is 1h; after drying at 100°C, the TiO with phenolic resin surface modification is obtained. 2 porous ceramic carrier;

[0071] (4) the TiO obtained in step (3) 2 The porous ceramic support is impregnated with a solution containing palladium acetate, so that palladium acetate is loaded on TiO 2 On a porous ceramic carrier, a ...

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Abstract

The invention provides a hydrogenation catalyst which adopts TiO2 porous ceramic as a carrier and a preparation method of the hydrogenation catalyst. The catalyst is modified by any one or a combination of ZrO2 and CeO2, is capable of using TiO2 porous ceramic which is surface-finished by phenolic resin, and is loaded with an active component Pd. The catalyst disclosed by the invention can be used for improving fracture toughness and strength of the TiO2 porous ceramic carrier; moreover, the surface of the TiO2 porous ceramic carrier is modified by adopting a phenolic resin solution, so that the aggregation of the active component Pd on the catalyst surface is effectively prevented, and the hydrogenation performances of the catalyst are improved. Moreover, the catalyst disclosed by the invention is simple in preparation process, lower in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation catalyst, in particular to a 2 The invention discloses a method for preparing a catalyst for crude terephthalic acid or p-carboxybenzaldehyde hydrogenation with porous ceramics as a carrier. Background technique [0002] Porous ceramics refer to new ceramic materials with a certain size and number of pore structures. Because of its high temperature stability, good thermal shock resistance, low thermal conductivity, and good chemical stability, it is widely used in biological materials, refractory materials, separation, filtration, catalytic reactions, reaction electrodes, engine exhaust gas treatment and other fields. [0003] Porous ceramics can be divided into alumina-based, zirconia-based, silicon carbide-based, and titania-based based on different types of ceramic matrix materials. Alumina-based porous ceramics are a class of widely used ceramic materials, but due to the complex pre...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J23/44C07C63/26C07C51/487
Inventor 许建文王继元卞伯同堵文斌陈韶辉杨爱武柏基业庞焱朱庆奋
Owner CHINA PETROLEUM & CHEM CORP
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