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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  • Summary
  • Abstract
  • Description
  • 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 disadvant

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  • Hydrogenation catalyst and preparation method thereof

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Example Embodiment

[0040] According to the present invention, TiO is provided 2 The preparation method of the hydrogenation catalyst with porous ceramic as the carrier includes the following steps:

[0041] (1) Change ①TiO 2 Powder, ②porogen, ③modifier, and ④dilute nitric acid to get contact product;

[0042] (2) Extruding the contact product into a molded product;

[0043] (3) Calcination of the shaped product to obtain TiO 2 Porous ceramic carrier;

[0044] (4) The TiO obtained in step (3) 2 The porous ceramic carrier is contacted with the phenolic resin solution and dried to obtain the phenolic resin surface-modified TiO 2 Porous ceramic carrier;

[0045] (5) The modified TiO obtained in step (4) 2 The porous ceramic carrier contacts the solution containing the Pd compound to load the palladium compound on TiO 2 On the porous ceramic carrier, the catalyst precursor is obtained;

[0046] (6) The catalyst precursor obtained in step (5) is calcined and reduced by hydrogen to obtain TiO 2 The porous ceramic...

Example Embodiment

[0060] Example 1

[0061] (1) Change ①TiO 2 100 parts of powder, ②15 parts of pore-forming agent methyl cellulose, ③modifier ZrO 2 10 parts, ④ 40 parts of 10% dilute nitric acid are mixed and kneaded uniformly; the kneaded materials are extruded and cut into strips of 5-6 mm; the strips are dried at 120°C and calcined 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 and stir for 1 hour to obtain a uniform and transparent solution;

[0063] (3) The 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; after drying at 100°C, the phenolic resin surface-modified TiO 2 Porous ceramic carrier;

[0064] (4) The TiO obtained in step (3) 2 The porous ceramic carrier is impregnated with the solution containing palladium chloride to load the palladium chloride on TiO 2 On the porous ceramic carrier, the catalyst precursor is obtai...

Example Embodiment

[0067] Example 2

[0068] (1) Change ①TiO 2 100 parts of powder, ②5 parts of carbon fiber pore former, ③modifier ZrO 2 After mixing 5 parts and 50 parts of 5% dilute nitric acid with a concentration of 5%, knead uniformly; extrude the kneaded material and cut into strips of 5-6mm; the strips are dried at 120°C and calcined at 900°C for 4 hours. TiO 2 Porous ceramic carrier;

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

[0070] (3) The 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 phenolic resin surface-modified TiO 2 Porous ceramic carrier;

[0071] (4) The TiO obtained in step (3) 2 The porous ceramic carrier is impregnated with a solution containing palladium acetate to load the palladium acetate on TiO 2 On the porous ceramic carrier, the catalyst precursor is obtai...

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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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