Catalyst and method of producing unsaturated aldehyde and unsaturated carboxylic acid

A catalyst, unsaturated technology, used in chemical instruments and methods, organic chemistry methods, catalyst activation/preparation, etc.

Inactive Publication Date: 2011-05-04
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 5 has nothing to do with supported catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Preparation of Catalyst-1

[0102] 300ml of Ring Carrier-1 was introduced into the tumble granulator and moistened with aqueous glycerin. Then, a mixture of 300 g of catalyst powder-1 and 15 g of crystalline cellulose and an aqueous glycerin solution were alternately added thereto, thereby preparing catalyst powder-loaded particles. Next, these particles were dried at room temperature for 15 hours, and then calcined at 530° C. for 5 hours under air flow, thereby obtaining the catalyst of the present invention. The catalyst thus obtained had an outer diameter of 7.4 mm, a length of 7.7 mm and a pore diameter of 1.8 mm. In addition, the catalyst had a degree of attrition of 4.0%, a volume specific gravity of 1.03, and a porosity of 68%.

Embodiment 1-2

[0104] Preparation of Catalyst-1-2

[0105] The granulation chamber was adjusted to a weight absolute humidity of 0.015 (room temperature 25° C.), and 300 ml of Ring Carrier-1 was introduced into the tumble granulator and moistened with an aqueous glycerin solution. Then, a mixture of 300 g of catalyst powder-1 and 15 g of crystalline cellulose and an aqueous glycerin solution were alternately added thereto, thereby preparing catalyst powder-loaded particles. Next, these particles were dried at room temperature for 15 hours, and then calcined at 530° C. for 5 hours under air flow, thereby obtaining the catalyst of the present invention. The catalyst thus obtained had an outer diameter of 7.5 mm, a length of 7.6 mm and a pore diameter of 0.5 mm. In addition, the catalyst had a degree of attrition of 1.2%, a volume specific gravity of 1.03, and a porosity of 66%.

Embodiment 2

[0107] Preparation of Catalyst-2

[0108] The catalyst of the present invention was obtained in the same manner as in Example 1, except that Ring Support-2 was used as the support. The catalyst thus obtained had an outer diameter of 7.1 mm, a length of 7.7 mm and a pore diameter of 1.1 mm. In addition, the catalyst had a degree of attrition of 3.0%, a volume specific gravity of 1.06, and a porosity of 70%.

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Abstract

Provided is a catalyst which can prevent a lowering in selectivity for a target product in a gas-phase catalytic reaction and has an excellent frictional resistance. A catalyst which is a supported catalyst comprising an inert support that is coated with a catalyst powder, characterized in that the inert support is ring-shaped and has an outer periphery that is curved in the lengthwise direction of the support, and the catalyst is produced by granulation in a moisten environment. The above-described catalyst is useful in the gas-phase oxidation of propylene, isobutylene, tertiary-butyl alcohol or methyl tertiary-butyl ether to thereby produce an unsaturated aldehyde corresponding thereto, or in the gas-phase oxidation of such an unsaturated aldehyde as described above to thereby produce an unsaturated carboxylic acid.

Description

technical field [0001] The present invention relates to a novel catalyst for use in gas-phase catalytic oxidation reactions to obtain unsaturated aldehydes or unsaturated carboxylic acids. Background technique [0002] Hitherto, many proposals have been made regarding the active ingredient composition or shape of catalysts for the production of acrolein and acrylic acid by subjecting propylene to gas-phase catalytic oxidation; for the production of methacrolein and Catalysts for the production of methacrylic acid by gas-phase catalytic oxidation of isobutene, tert-butanol or methyl tert-butyl ether; or catalysts for the production of acrylic acid or methacrylic acid by the production of acrolein or It is realized by gas-phase catalytic oxidation of methacrolein. For example, catalyst shapes such as granular, spherical, cylindrical, and ring shapes are known, and catalysts are used after being molded into shapes suitable for the operating conditions for oxidation reaction an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/02B01J23/88B01J37/00C07C27/12C07C45/35C07C47/22C07C57/05C07B61/00C07C51/235C07C51/25
CPCB01J23/002B01J35/026B01J37/0215B01J37/0217B01J2523/00C07C45/35C07C51/235C07C51/252C07C47/22C07C57/04B01J2523/54B01J2523/68B01J2523/842B01J2523/845B01J2523/847B01J2523/17B01J2523/36B01J2523/44B01J2523/52B01J2523/55
Inventor 中原正树椙秀树濑尾纯将仓上龙彦尾上宏之
Owner NIPPON KAYAKU CO LTD
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