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Catalyst for selective hydrogenation of alpha, beta-unsaturated aldehyde to prepare unsaturated alcohol, preparation method and application thereof

An aldehyde-selective and unsaturated technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of organic solvent pollution and low selectivity of unsaturated alcohols , to achieve the effect of eliminating pollution, high selectivity and reducing burden

Active Publication Date: 2019-04-19
SHANDONG NHU PHARMA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, some of the catalysts in the current published patents have the problem of low selectivity to unsaturated alcohols, some have the problem of organic solvent pollution, some have higher requirements for catalyst life, and some are only for a specific type of α , β-unsaturated aldehydes are effective
There is no selective hydrogenation catalyst suitable for different types of α, β-unsaturated aldehydes, taking into account activity selectivity and process environment friendly

Method used

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  • Catalyst for selective hydrogenation of alpha, beta-unsaturated aldehyde to prepare unsaturated alcohol, preparation method and application thereof
  • Catalyst for selective hydrogenation of alpha, beta-unsaturated aldehyde to prepare unsaturated alcohol, preparation method and application thereof
  • Catalyst for selective hydrogenation of alpha, beta-unsaturated aldehyde to prepare unsaturated alcohol, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Preparation method of a catalyst for selective hydrogenation of α, β-unsaturated aldehydes to unsaturated alcohols

[0047] Include the following steps:

[0048] (1) Preparation of carrier

[0049] Add 8g of 3% aqueous sodium bicarbonate solution dropwise to 378.5g of 10% cerium nitrate solution, leave the resulting suspension to age at room temperature for 8 hours, filter out the filter cake with suction, dry at 120°C for 12 hours, and roast at 500°C 4h, get CeO 2 carrier.

[0050] (2) Preparation of catalyst precursor

[0051] An impregnating solution containing ruthenium chloride, ferric chloride and zinc acetate was prepared, and the mass contents of ruthenium, iron and zinc in the impregnating solution were 3.0%, 5.0% and 0.5% respectively. Immerse 10g of the carrier in 10g of impregnating solution, stir and adsorb at room temperature for 24h, air-dry naturally, and then dry at 60°C for 12h to prepare a catalyst precursor. In the prepared catalyst precursor, the ...

Embodiment 2

[0057] Preparation method of a catalyst for selective hydrogenation of α, β-unsaturated aldehydes to unsaturated alcohols

[0058] Include the following steps:

[0059] (1) Preparation of carrier

[0060] Add 8g of 3% aqueous sodium bicarbonate solution dropwise to 378.5g of 10% cerium nitrate solution, leave the resulting suspension to age at room temperature for 8 hours, filter out the filter cake with suction, dry at 120°C for 12 hours, and roast at 500°C 4h, get CeO 2 carrier.

[0061] (2) Preparation of catalyst precursor

[0062] An impregnation solution containing ruthenium nitrate, iron nitrate and zinc nitrate was prepared, and the mass contents of ruthenium, iron and zinc in the impregnation solution were 5.0%, 1.5% and 1.0% respectively. Immerse 10g of the carrier in 10g of impregnating solution, stir and adsorb at room temperature for 24h, air-dry naturally, and then dry at 60°C for 6h to obtain a catalyst precursor. In the prepared catalyst precursor, the Ru l...

Embodiment 3

[0068] Preparation method of a catalyst for selective hydrogenation of α, β-unsaturated aldehydes to unsaturated alcohols

[0069] Include the following steps:

[0070] (1) Preparation of carrier

[0071] Add 8g of 3% aqueous sodium bicarbonate solution dropwise to 378.5g of 10% cerium nitrate solution, leave the resulting suspension to age at room temperature for 8 hours, filter out the filter cake with suction, dry at 120°C for 12 hours, and roast at 500°C 2h, get CeO 2 carrier.

[0072] (2) Preparation of catalyst precursor

[0073] An impregnation solution containing ruthenium acetate, iron nitrate and zinc nitrate is prepared, and the mass contents of ruthenium, iron and zinc in the impregnation solution are 1.0%, 0.05% and 0.1% respectively. Immerse 10g of carrier in 10g of impregnating solution, stir and adsorb at room temperature for 24h, air-dry naturally, and then dry at 60°C for 12h to obtain a catalyst precursor. In the prepared catalyst precursor, the Ru loadi...

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Abstract

The invention provides a catalyst for selective hydrogenation of alpha, beta-unsaturated aldehyde to prepare unsaturated alcohol. The catalyst comprises a carrier, an active component and an assistant, and the catalyst also includes an inhibitor. The carrier is CeO2, the active component is Ru, the assistant is one of Fe, Co, Mn and Sn, and the inhibitor is one of Zn, Pb and Bi. When applied to hydrogenation of alpha, beta-unsaturated aldehyde shown as general formula I into corresponding alcohol of general formula II, the catalyst has good conversion rate and selectivity, can be applied repeatedly, and can be used for the synthesis process of important raw materials and reaction intermediates in production of spices, drugs and other fine chemical products.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, and relates to a catalyst for selective hydrogenation of α, β-unsaturated aldehydes to produce unsaturated alcohols, a preparation method and application thereof. Background technique [0002] α, β-unsaturated alcohols, such as geraniol and nerol, cinnamyl alcohol, and isobutenol, are important raw materials and reaction intermediates in the production of fragrances, pharmaceuticals, and other fine chemical products. [0003] At present, most of the α, β-unsaturated alcohols in industrial production use NaBH 4 or AlLiH 4 It can be obtained by direct reduction of α, β-unsaturated aldehydes. Although this method can obtain α, β-unsaturated alcohols with high yields, it has serious disadvantages: not only the reaction conditions are difficult to control, the products are difficult to separate, but also a large amount of three wastes are generated to pollute the environment, which...

Claims

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Application Information

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IPC IPC(8): B01J23/644B01J23/656B01J23/89B01J35/02B01J35/10C07C29/141C07C33/03C07C33/32C07C33/02
CPCC07C29/141B01J23/6447B01J23/6562B01J23/8953B01J23/8966B01J35/40B01J35/613B01J35/615C07C33/03C07C33/32C07C33/02Y02P20/584
Inventor 张玉霞马啸乔胜超李文涛于明赵文乐毛建拥王勇
Owner SHANDONG NHU PHARMA
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