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Catalyst for preparing iso-octanal through selective hydrogenation of iso-octenal, preparation method and application thereof

A technology for selective hydrogenation and isooctenal, applied in catalytic reactions, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of reduced palladium dispersion and utilization rate, complicated preparation process and other problems, to achieve the effect of increasing load stability, simple process, and improving dispersion

Active Publication Date: 2020-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this traditional physically supported palladium catalyst is complicated, and the phenomenon of palladium aggregation in the carrier pores is unavoidable, resulting in a decrease in the dispersion and utilization of palladium.

Method used

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  • Catalyst for preparing iso-octanal through selective hydrogenation of iso-octenal, preparation method and application thereof
  • Catalyst for preparing iso-octanal through selective hydrogenation of iso-octenal, preparation method and application thereof
  • Catalyst for preparing iso-octanal through selective hydrogenation of iso-octenal, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Weigh 20mmol (1.88g) of polyvinylimidazole (PVIM) and dissolve it in 200ml of methanol, and add 50ml of methanol solution with a sulfuric acid concentration of 0.1mmol / ml dropwise under stirring, and a solid substance appears in the solution immediately. After the dropwise addition was completed, keep stirring for 4h. Finally, after vacuum filtration and washing with methanol for 3 times, dry at 80°C for 8h to obtain the sulfuric acid-polyvinylimidazole complex (H 2 SO 4 -PVIM).

[0059] (2) The H obtained above 2 SO 4 - PVIM is dispersed in methanol at a concentration of 0.1 g / ml. Under the condition of stirring, 10 ml of palladium nitrate methanol solution containing palladium with a concentration of 0.05 mmol / ml was added dropwise. After the dropwise addition, keep stirring for 4h. Finally, after vacuum filtration and washing with methanol for 3 times, it was dried at 80°C for 8 hours to obtain a palladium-sulfuric acid-polyvinylimidazole composite catalyst...

Embodiment 2

[0061] (1) Weigh 20mmol (1.88g) of polyvinylimidazole (PVIM) and dissolve it in 200ml of methanol, and add 50ml of methanol solution with a sulfuric acid concentration of 0.1mmol / ml dropwise under stirring, and a solid substance appears in the solution immediately. After the dropwise addition was completed, keep stirring for 4h. Finally, after vacuum filtration and washing with methanol for 3 times, dry at 80°C for 8h to obtain the sulfuric acid-polyvinylimidazole complex (H 2 SO 4 -PVIM).

[0062] (2) The H obtained above 2 SO 4 - PVIM is dispersed in methanol at a concentration of 0.1 g / ml. Take 0.4ml palladium nitrate methanol solution containing palladium concentration of 0.05mmol / ml, dilute it to 20ml with methanol, and add H 2 SO 4 -PVIM in methanol. After the dropwise addition, keep stirring for 4h. Finally, after vacuum filtration and washing with methanol for 3 times, it was dried at 80°C for 8 hours to obtain a palladium-sulfuric acid-polyvinylimidazole compo...

Embodiment 3

[0064] (1) Weigh 20mmol (1.88g) of polyvinylimidazole (PVIM) and dissolve it in 200ml of methanol, and add 10ml of a methanol solution with a sulfuric acid concentration of 0.1mmol / ml dropwise under stirring, and a solid substance appears in the solution immediately. After the dropwise addition was completed, keep stirring for 4h. Finally, after vacuum filtration and washing with methanol for 3 times, dry at 80°C for 8h to obtain the sulfuric acid-polyvinylimidazole complex (H 2 SO 4 -PVIM).

[0065] (2) The H obtained above 2 SO 4 - PVIM is dispersed in methanol at a concentration of 0.1 g / ml. Under the condition of stirring, 60 ml of palladium nitrate methanol solution containing palladium with a concentration of 0.05 mmol / ml was added dropwise. After the dropwise addition, keep stirring for 4h. Finally, after vacuum filtration and washing with methanol for 3 times, it was dried at 80°C for 8 hours to obtain a palladium-sulfuric acid-polyvinylimidazole composite cataly...

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Abstract

The invention discloses a catalyst for preparing iso-octanal through selective hydrogenation of iso-octenal, and a preparation method and application thereof. The catalyst is a metal-polymer compositecatalyst and comprises a polybasic acid cross-linked polymer matrix and a metal active component, and the polybasic acid cross-linked polymer matrix is obtained under the coordination cross-linking action of a polybasic acid cross-linking agent. The method is mild in reaction condition and high in iso-octanal selectivity, and the composite catalyst has the advantages of simple preparation process, high metal dispersity, and good stability.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst, a preparation method and an application for preparing isooctenal by selective hydrogenation of isooctenal. Background technique [0002] 2-Ethylhexanal (industrial name isooctylaldehyde) is an important chemical intermediate product, which can be oxidized to produce isooctanoic acid as a coating and resin modifier, and can also be reduced to produce isooctyl alcohol for the production of plasticizers Dioctyl phthalate (DOP). At the same time, isooctylaldehyde is also a fragrance additive, used in soaps and synthetic detergents. [0003] At present, the industrial preparation of isooctyl aldehyde mainly includes propylene oxo synthesis method and acetaldehyde aldol condensation method. The propylene oxo synthesis method is to obtain butyraldehyde from propylene and synthesis gas under the action of cobalt or ruthenium catalyst, and then condense and dehydrate to ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/34B01J35/10C07C45/62C07C47/02
CPCB01J31/1815B01J31/34C07C45/62B01J2231/645B01J2531/0213B01J2531/824B01J35/61C07C47/02
Inventor 陈勇鲁树亮徐洋吴佳佳郝雪松
Owner CHINA PETROLEUM & CHEM CORP
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