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Catalyst for producing alpha, beta-unsaturated carboxylic acid and method for preparation thereof, and method for producing alpha, beta-unsaturated carboxylic acid

A manufacturing method and unsaturated technology, applied in the alpha field, can solve the problem of not finding the physical properties of the carrier

Active Publication Date: 2008-11-19
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the physical properties of these carriers, only Patent Document 1 describes "preferably a hydrophobic carrier or a hydrophobized general carrier", and there is no description of the physical properties of the carrier other than that

Method used

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  • Catalyst for producing alpha, beta-unsaturated carboxylic acid and method for preparation thereof, and method for producing alpha, beta-unsaturated carboxylic acid
  • Catalyst for producing alpha, beta-unsaturated carboxylic acid and method for preparation thereof, and method for producing alpha, beta-unsaturated carboxylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] (catalyst manufacturing)

[0090] 1 part of palladium acetate (manufactured by N.E. Chemkitatsuto) was dissolved in 55 parts of 88% by mass n-valeric acid aqueous solution. This solution was transferred to an autoclave, and 5 parts of synthetic raw material activated carbon (total pore volume of 0.64 cc / g, BET specific surface area of ​​1313 m 2 / g, the pore volume ratio of mesopores with a pore diameter of 2 to 50 nm is 7.8% of the total pore volume), and stirred. After introducing propylene to 0.5 MPa, the temperature was raised to 50° C. over 30 minutes, and then reduced for 30 minutes. After the reduction, the obtained palladium-supported catalyst was filtered, washed with 88% by mass acetic acid aqueous solution, replaced, and then filtered to obtain a palladium-containing supported catalyst with a supported amount of 10% by mass.

[0091] (response evaluation)

[0092] Into the autoclave were charged 135 parts of an 88% by mass aqueous acetic acid solution cont...

Embodiment 2

[0095] In addition to the carrier, activated carbon produced from palm shells manufactured by Kurare Chemical Co., Ltd. (the total pore volume is 0.49cc / g, the BET specific surface area is 988m 2 / g, the pore volume ratio of mesopores with a pore diameter of 2 to 50 nm is 10% of the total pore volume), the catalyst was produced and the reaction evaluation was performed in the same manner as in Example 1.

[0096] At this time, the conversion of methacrolein was 89.7%, the selectivity of methacrylic acid was 84.7%, and the productivity of methacrylic acid was 25.2 g / (g·h).

Embodiment 3

[0098] In addition to the carrier, activated carbon produced from coal produced by Daineon Co., Ltd. (the total pore volume is 0.46cc / g, the BET specific surface area is 753m 2 / g, the pore volume ratio of mesopores with a pore diameter of 2 to 50 nm is 33% of the total pore volume), the catalyst was produced and the reaction evaluation was performed in the same manner as in Example 1.

[0099] At this time, the conversion of methacrolein was 84.4%, the selectivity of methacrylic acid was 80.1%, and the productivity of methacrylic acid was 22.4 g / (g·h).

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Abstract

The invention provides a catalyst for producing an alpha, beta-unsaturated carboxylic acid, which is an alpha, beta-unsaturated carboxylic acid from an olefin or an alpha, beta-unsaturated aldehyde through the liquid phase oxidation, characterized in that palladium having an average particle diameter in the range of 1 to 8 nm is carried in a carrier.

Description

[0001] The application date is February 8, 2005, the application number is 200580004222.X, the title of the invention is "α, β-unsaturated carboxylic acid production catalyst and its production method, and α, β-unsaturated carboxylic acid A divisional application of the Chinese patent application for "manufacturing method". technical field [0002] The present invention relates to a catalyst for producing α, β-unsaturated carboxylic acid by liquid-phase oxidation of olefin or α, β-unsaturated aldehyde, its production method, and α, β-unsaturated carboxylic acid using the catalyst Manufacturing method. Background technique [0003] α,β-Unsaturated carboxylic acids are many substances useful in industry. Acrylic acid and methacrylic acid are used in extremely large amounts as raw materials for synthetic resins and the like. For example, there are methods for producing methacrylic acid, such as gas-phase oxidation of isobutylene, liquid-phase oxidation, and 2-methyl-2-hydroxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J29/068B01J35/10B01J37/16C07C51/235C07C51/25C07C57/05C07C57/055
Inventor 藤森祐治二宫航竹田明男小岛真衣
Owner MITSUBISHI CHEM CORP