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Loaded complex catalyst for isobutylene hydrogen formylation reaction

A technology of isobutylene hydroformyl and catalyst, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrogenation hydrocarbon production, etc., and can solve the problems of popularization and application, complex preparation process, and catalyst activity group. Distributor loss and other issues

Inactive Publication Date: 2006-06-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Researchers have loaded catalytic complexes on various carriers and developed supported liquid film catalysts and supported water film catalysts, but the active components of these catalysts are seriously lost during the reaction, the preparation process is complicated, and the reaction conditions are relatively harsh. Affected its promotion and application
However, there are few reports about directly loading the active metal on the carrier and then modifying the catalyst with a ligand, and the patent report about the supported rhodium-cobalt double metal complex catalyst for isobutylene hydroformylation is also blank.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] (1) Catalyst preparation

[0012] Weigh 0.253g Co(NO 3 ) 2 ·6H 2 O, dissolved in distilled water, added 2.928g of SiO 2 The carrier was impregnated for 45min, then evaporated to dryness in a water bath at 80°C, dried in an oven at 120°C for 24h, and calcined in a tube furnace at 400°C for 3h under nitrogen protection. The obtained solid was impregnated with an acetone solution containing 0.124 g of triphenylphosphine for 30 min under the protection of nitrogen in a rotary evaporator, and then dried in vacuo to remove the acetone to obtain a supported cobalt-based complex catalyst, labeled as COSi-TPP; in an inert atmosphere Store for later use.

[0013] (2) Investigation of the activity of the catalyst

[0014] The hydroformylation reaction of isobutene was carried out in a 250ml magnetically driven stirred autoclave. Add 80ml of solvent xylene and 1.0g of catalyst to the reaction kettle, close the autoclave, replace the air in the system with nitrogen three times...

example 2

[0017] Weigh 0.073g RhCl 3 ·3H 2 O and 2.964g SiO 2 , the concrete steps are prepared with the catalyst in the reference example one, and the activity investigation of the catalyst is the same as the reference example one. The results showed that the conversion rate of isobutene was 44.66%, and the selectivity of isovaleraldehyde was 77.43%.

Embodiment 1

[0019] Weigh 0.073g RhCl 3 ·3H 2 O, 0.253g Co(NO 3 ) 2 ·6H 2 O and 2.892g SiO 2 , the concrete steps are prepared with the catalyst in the reference example one, and the activity investigation of the catalyst is the same as the reference example one. The results showed that the conversion rate of isobutene was 62.0%, and the selectivity of isovaleraldehyde was 89.3%.

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Abstract

The present invention features that loaded rhodium and cobalt bimetal complex catalyst has the advantages of high activity of rhodium catalyst and low cost of cobalt catalyst combined and excellent reaction effect. Through reaction at the reaction condition of 2.5 MPa for 5 hr, isobutylene converting rate can reach 62%, isovaleraldehyde selectivity can reach 89%, optimized isovaleraldehyde producing rate may reach 1257 mol / mol-Rh each hour, and no side product tert-valeraldehyde is produced. In the same time, the catalyst preparing process has been optimized.

Description

technical background [0001] The present invention relates to a novel catalyst for isobutene hydroformylation, more specifically a supported rhodium-cobalt double metal complex catalyst. [0002] Olefin hydroformylation is an important method for industrially preparing aldehydes and corresponding alcohols from olefins, and the catalysts used are mainly Group VIII metals or their compounds. The earliest olefin hydroformylation catalysts were cobalt and its compounds, and later rhodium catalysts were developed. Compared with cobalt catalysts, rhodium catalysts have the advantages of high activity, good selectivity, mild reaction conditions, and high content of linear aldehydes in the product, and have become a hot spot for researchers. During industrial application, the rhodium catalyst is dissolved in the reactant in the form of a phosphine complex to form a homogeneous catalytic system, which brings difficulties to the separation of the product and the catalyst after the react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18C07C5/02
Inventor 储伟徐士伟易敏曹汉锦陈贵斌
Owner SICHUAN UNIV
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