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Dimethylbenzyl alcohol hydrogenolysis catalyst as well as preparation method and application thereof

A technology of dimethylbenzyl alcohol and catalyst, applied in the field of dimethylbenzyl alcohol hydrogenolysis catalyst and preparation thereof, can solve the problems of high catalyst cost, poor selectivity, poor liquid resistance and the like, and achieves excellent activity and selectivity, The catalyst pores are unobstructed and the liquid resistance is good.

Active Publication Date: 2022-03-18
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Patent CN112569930A discloses a preparation method of cumene and the obtained cumene. In this patent, Pd and carbon-containing precursors are loaded on the alumina carrier, and the residual carbon content after roasting is <1.5%, and the Pd loading is 0.5%. , the cost of the catalyst is higher
In addition, the patent does not mention the molding method of the catalyst and the state of the catalyst particles after the reaction
[0012] When conventional noble metal catalysts are used in the hydrogenolysis reaction of dimethyl benzyl alcohol, there are disadvantages such as high catalyst cost, easy to cause aromatic ring saturation, and poor selectivity of cumene; nickel-based and copper-based catalysts have low activity, poor selectivity, and easy sintering And the catalyst has the disadvantages of poor liquid resistance
[0013] At present, the catalysts prepared by the prior art are used for the catalytic hydrogenolysis of dimethyl benzyl alcohol to prepare cumene, and there are high loads of noble metals such as Pt / Pd, low activity, poor selectivity, poor high temperature stability, poor liquid resistance and serious environmental pollution

Method used

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  • Dimethylbenzyl alcohol hydrogenolysis catalyst as well as preparation method and application thereof
  • Dimethylbenzyl alcohol hydrogenolysis catalyst as well as preparation method and application thereof
  • Dimethylbenzyl alcohol hydrogenolysis catalyst as well as preparation method and application thereof

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Effect test

Embodiment 1

[0106] The present embodiment provides a preparation method of a dimethylbenzyl alcohol hydrogenolysis catalyst, and the preparation method comprises the following steps:

[0107] (1) Preparation of solution:

[0108] 672.4g of water was first added into the reaction kettle, then 96.4g of copper formate, 24.7g of nickel formate and 85.6g of zinc formate were added, and mixed solution 1 was obtained by fully stirring and dissolving;

[0109] Dissolve 133.3 g of urea in 755.2 g of water to obtain an aqueous urea solution, and then add 78.0 g of alkaline silica sol (SiO 2 content of 30wt%, particle size of 30nm, pH of 9.0) and fully stirred to obtain mixed solution 2;

[0110] Add 11.6g γ-aminopropyltrimethoxysilane to 253.5g nano-silica ethanol solution (SiO 2 content is 20wt%, particle size is 30nm), fully stirring to obtain mixed solution 3;

[0111] 0.5g of palladium acetylacetonate and 4.2g of ruthenium acetylacetonate were dissolved in 93.8g of benzene, and fully stirred...

Embodiment 2

[0122] The present embodiment provides a preparation method of a dimethylbenzyl alcohol hydrogenolysis catalyst, and the preparation method comprises the following steps:

[0123] (1) Preparation of solution:

[0124] 672.4g of water was added into the reactor, then 124.8g of copper formate, 12.4g of nickel formate and 75.0g of zinc formate were added, and mixed solution 1 was obtained by fully stirring and dissolving;

[0125] Dissolve 145.9 g of urea in 583.5 g of water to obtain an aqueous urea solution, and then add 83.6 g of alkaline silica sol (SiO 2 content of 40wt%, particle size of 40nm, pH of 9.0) and fully stirred to obtain mixed solution 2;

[0126] Add 6.5g γ-aminopropyltriethoxysilane to 264.0g nano-silica ethanol solution (SiO 2 content is 20wt%, particle size is 30nm), fully stirring to obtain mixed solution 3;

[0127] 0.75g of palladium acetylacetonate and 2.4g of ruthenium acetylacetonate were dissolved in 62.8g of benzene, and fully stirred to obtain mix...

Embodiment 3

[0135] The present embodiment provides a preparation method of a dimethylbenzyl alcohol hydrogenolysis catalyst, and the preparation method comprises the following steps:

[0136] (1) Preparation of solution:

[0137] 750.3g of water was first added into the reaction kettle, then 113.5g of copper formate, 39.6g of nickel formate and 78.2g of zinc formate were added, and mixed solution 1 was obtained by fully stirring and dissolving;

[0138] Dissolve 189.3 g of urea in 441.6 g of water to obtain an aqueous urea solution, and then add 70.0 g of alkaline silica sol (SiO 2 content of 30wt%, particle size of 30nm, pH of 9.0) and fully stirred to obtain mixed solution 2;

[0139] Add 6.8g aniline methyl trimethoxysilane to 248.0g nano-silica propanol solution (SiO 2 content is 15wt%, particle size is 30nm), fully stirring to obtain mixed solution 3;

[0140] 0.90g of palladium acetylacetonate and 1.2g of ruthenium acetylacetonate were dissolved in 41.9g of chloroform, and fully ...

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Abstract

The invention provides a dimethyl benzyl alcohol hydrogenolysis catalyst and a preparation method and application thereof.The active components of the dimethyl benzyl alcohol hydrogenolysis catalyst comprise Pd, Ru, Cu and Ni, Pd and Ru in the active components are highly dispersed on the surface layer of the catalyst, side reactions such as excessive hydrogenation are inhibited, and the catalytic activity of the catalyst is improved. The dimethyl benzyl alcohol diffused into the pore channel of the catalyst can be subjected to hydrogenolysis reaction under the catalysis of Cu and Ni to generate isopropyl benzene, but is difficult to further hydrogenate to generate a byproduct isopropyl cyclohexane; a carrier of the dimethyl benzyl alcohol hydrogenolysis catalyst is a composite carrier comprising ZnO, SiO2 and Al2O3, so that the efficient hydrogenolysis catalyst with highly dispersed active components, reliable strength and moderate acidity can be obtained; the dimethyl benzyl alcohol hydrogenolysis catalyst has the advantages of being high in active component dispersity, smooth in catalyst pore channel and the like, and has excellent activity and selectivity when being used for preparing isopropyl benzene through dimethyl benzyl alcohol hydrogenolysis.

Description

technical field [0001] The invention relates to the technical field of hydrogenolysis catalysts, in particular to a dimethylbenzyl alcohol hydrogenolysis catalyst and a preparation method and application thereof. Background technique [0002] Industrial production of propylene oxide (PO) mainly includes chlorohydrin method, direct oxidation of hydrogen peroxide and co-oxidation method (Halcon method). Chlorohydrin method is the main route for producing PO at present, and this process has serious problems such as equipment corrosion and environmental pollution. Due to the high cost of raw materials, the direct oxidation route of hydrogen peroxide is economically affected. The co-oxidation method is to generate propylene oxide by the reaction of organic peroxide and propylene. Although the traditional isobutane co-oxidation method and ethylbenzene co-oxidation method avoid the serious environmental pollution caused by the chlorohydrin method with high investment and long pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J35/10C07C1/22C07C15/085
CPCB01J23/8953C07C1/22B01J35/394B01J35/60C07C15/085Y02P20/52
Inventor 李作金詹吉山于海波沙宇孙康王同济叶飞王雷雷蒙萌王勤隆黎源
Owner WANHUA CHEM GRP CO LTD
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