Composite metal oxide catalyst for one-step preparation of isobutyl isobutyrate from isobutyraldehyde, and preparation method of composite metal oxide catalyst

A technology of isobutyl isobutyrate and composite metal, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, aldehyde redox preparation, catalyst activation/preparation, etc. Replaced by hydroxyl groups, deactivated and other problems, to achieve the effect of improving stability and service life, good surface distribution, and high loading capacity

Active Publication Date: 2021-01-12
RUNTAI CHEM TAIXING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the instability of the isobutoxyaluminum catalyst and its inactivation due to its own ligands being easily replaced by hydroxyl groups during the reaction process, the present invention synthesized a nanometer with a mesoporous structure through a space synthesis method combined with a hydrothermal microwave method. CuO-M x o y (M=Ce, Cr, Ti) carrier, and then use the supercritical fluid impregnation method to load aluminum isobutoxide on the surface of the carrier, so the catalyst has more active centers, strong adsorption and mass transfer capabilities, and significantly improves the catalytic performance of the catalyst. The stability and service life of the catalyst enable the catalyst to be used repeatedly

Method used

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  • Composite metal oxide catalyst for one-step preparation of isobutyl isobutyrate from isobutyraldehyde, and preparation method of composite metal oxide catalyst
  • Composite metal oxide catalyst for one-step preparation of isobutyl isobutyrate from isobutyraldehyde, and preparation method of composite metal oxide catalyst
  • Composite metal oxide catalyst for one-step preparation of isobutyl isobutyrate from isobutyraldehyde, and preparation method of composite metal oxide catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of carrier

[0022] Weigh 9.0 g of copper nitrate and 3.0 g of cerium nitrate, and dissolve them in 120 ml of water after mixing uniformly to prepare a metal salt mixed solution. Dry 3.6g of carbon black at 150°C for 24 hours, then fully impregnate the carbon black with ethanol, use it after the ethanol evaporates, and perform surface active treatment on the carbon black to enhance its adsorption capacity. Then the pretreated carbon black was dispersed in an alkali solution with a concentration of 0.1 mol / L TPAOH, and the prepared metal salt mixed solution was added dropwise thereto, and stirred at room temperature for 5 hours. Then add 1.2 g of F127, and add 2 mol / L ammonium hydroxide solution dropwise thereinto with stirring until the pH is 10. Then put it in an autoclave, and crystallize in a microwave system at 180°C for 6 hours. Then the product was filtered, washed several times with distilled deionized water, and dried in an oven at 80° C. for 2...

Embodiment 2

[0030] In step (3), 0.3g aluminum isobutoxide is changed into 0.6g aluminum isobutoxide, and other operations are with embodiment 1.

Embodiment 3

[0032] In step (3), 0.3g aluminum isobutoxide is changed into 0.9g aluminum isobutoxide, and other operations are with embodiment 1.

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a composite metal oxide catalyst for one-step preparation of isobutyl isobutyrate from isobutyraldehyde, and a preparation method of the composite metal oxide catalyst. According to the invention, carbon black is used as an inert matrix, a nanometer CuO-MxOy (wherein M is Ce, Cr or Ti) carrier with a mesoporousstructure is synthesized by combining a space synthesis method with a hydrothermal microwave method, and then aluminum isobutoxide is loaded on the surface of the carrier by utilizing a supercriticalfluid impregnation method to prepare the catalyst. The preparation method is simple; the catalyst has a good structure and a good surface distribution state; a mesoporous structure significantly improves the stability of the catalyst and prolongs the service life of the catalyst, so the catalyst has a higher specific surface area and can be used in a reaction for preparing isobutyl isobutyrate from isobutyraldehyde in one step; and the reaction activity of the catalyst and the selectivity of isobutyl isobutyrate are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a composite metal oxide catalyst for preparing isobutyl isobutyrate with isobutyraldehyde in one step and preparation thereof. Background technique [0002] Isobutyl isobutyrate (IBIBE) is a kind of colorless or light yellow liquid with pineapple, grape skin or ether aroma, because it is basically harmless to humans and animals and will not cause environmental pollution, it is a good green Therefore, it is widely used as pineapple flavor in food, beverage and perfume industry, and at the same time, it is also an excellent organic solvent, dry paint remover, and additive for extraction and distillation. With the improvement of environmental protection requirements, the application of isobutyl isobutyrate is more and more extensive. Isobutyl isobutyrate is usually synthesized by isobutyric acid (IBAC) and isobutanol (IBOH) Fischer's esterification. This traditional m...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J23/83B01J23/86B01J23/72B01J37/10B01J37/34B01J37/02C07C67/44C07C69/24
CPCB01J31/0212B01J23/83B01J23/002B01J23/868B01J23/72B01J37/10B01J37/346B01J37/0203C07C67/44B01J35/23C07C69/24Y02P20/54
Inventor 卢小松宋文国张世元
Owner RUNTAI CHEM TAIXING CO LTD
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