Hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and hydrogenation reaction technology, applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problems of low OPP selectivity, short life, low economic benefits, etc.

Pending Publication Date: 2022-07-29
SHANGHAI ZHONGHUA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses butyl titanate as the titanium source, and introduces it into the pores of the ordered mesoporous silica material through the sol-gel method. It needs to be washed with a large amount of water and ethanol, and a large amount of waste water will be generated during industrial scale-up, which is harmful to environmental protection. Great impact; when OPP is prep

Method used

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  • Hydrogenation catalyst and preparation method thereof
  • Hydrogenation catalyst and preparation method thereof
  • Hydrogenation catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0082] Take 100g of strip α-Al with a diameter of 3mm 2 O 3 Put it into the sugar coating machine, the speed of the sugar coating machine is 30r / min, and slowly spray 100g of magnesium nitrate aqueous solution with a magnesium nitrate mass fraction of 32% onto the surface of the carrier. During the entire spraying process, the sugar coating machine is blasted and kept at 50 ℃ air temperature , after the spraying of the magnesium nitrate solution is completed, take out the carrier, dry it at 100 °C for 5 h, put the dried sample into the muffle furnace for calcination, and raise the temperature from room temperature to 600 °C at a heating rate of 5 °C / min, and then put it in a muffle furnace. 600 ℃ calcination for 5 hours to obtain MgO-Al 2 O 3 Composite support, in which MgO content is about 8wt%, α-Al 2 O 3 The content is about 92 wt%.

[0083] Take 100g of the above-mentioned composite carrier and put it into the sugar-coating machine. The sugar-coating machine rotates a...

Embodiment 2

[0085] In Example 1, the amount of the magnesium nitrate aqueous solution with a magnesium nitrate mass fraction of 32% was changed to 220 g, and the rest of the preparation method was the same as that of Example 1, and the catalyst of Example 2 was prepared. The content of MgO in the support of the catalyst is about 16wt%, α-Al 2 O 3 The content is about 84 wt%. The Pt loading in the catalyst was 0.5 wt%.

Embodiment 3

[0087] In Example 1, the amount of the magnesium nitrate aqueous solution with a magnesium nitrate mass fraction of 32% was changed to 61 g, and the rest of the preparation method was the same as that of Example 1, and the catalyst of Example 3 was prepared. The content of MgO in the support of the catalyst is about 5wt%, α-Al 2 O 3 The content is about 95 wt%. The Pt loading in the catalyst was 0.5 wt%.

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Abstract

The present invention provides a hydrogenation catalyst, the hydrogenation catalyst comprises a carrier and an active component having a catalysis effect, the carrier comprises alpha-Al2O3 and MgO, and the active component comprises a platinum element. According to the invention, alumina with a specific crystal form is used as an inner core and is coated with a basic oxide to form a composite carrier, and then a noble metal is loaded on the composite carrier to obtain the hydrogenation catalyst. The hydrogenation catalyst is applied to a reaction for preparing OPP through hydrogenation hydrogenolysis of dibenzofuran, and has the characteristics of high OPP selectivity, few byproducts, good stability, long service life and the like. More active noble metals in the hydrogenation catalyst are dispersed on the surface of the carrier, so that the use amount of noble metal components is reduced. The hydrogenation catalyst is simple in preparation process and easy for large-scale production. Therefore, the hydrogenation catalyst provided by the invention has excellent industrial application prospects.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a hydrogenation catalyst and a preparation method thereof. Background technique [0002] At present, the main production processes used in the industrial production of o-phenylphenol (OPP) include the di-condensation route of cyclohexanone and the high-pressure hydrolysis route of chlorobenzene. Among them, the cyclohexanone condensation dehydrogenation process is developed and used by the German Bayer Company, which requires high equipment. It uses concentrated sulfuric acid as a catalyst to generate a large amount of acidic wastewater. Domestic enterprises mostly use this route. The high-pressure hydrolysis route of chlorobenzene was developed by Dow Chemical Company in the United States. This process produces a large number of by-products of p-phenylene ether and p-phenylphenol. The main product OPP is purified by recrystallization. The purity is not high, and there is a l...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J35/02C07C37/055C07C39/15
CPCB01J23/42B01J23/002B01J35/023C07C37/055C07C39/15
Inventor 吴鹏李永刚郭天烨左刚吴庆敏田超李明时鲁墨弘相东商建谢志强
Owner SHANGHAI ZHONGHUA TECH CO LTD
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