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Method for preparing cinnamyl alcohol

A technology of cinnamyl alcohol and cinnamaldehyde, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of high loading and high loading, and achieve the effect of simple process and high yield

Inactive Publication Date: 2011-05-18
尹华芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the catalyst systems studied are based on noble metal catalysts, and some noble metals have a high load. Nitta et al. have studied the supported cobalt catalysts and found that the selectivity of α, β-unsaturated alcohols is very high, but the catalyst The load capacity is as high as 40% or more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Catalyst preparation

[0013] Soak 100g of activated clay in 200ml of 0.05mol L -1 Fe(NO 3 ) 3 solution, stirred at room temperature for 16 hours, dried by an infrared lamp, and then immersed in a certain amount of 0.2mol L -1 Zn(NO 3 ) 2 solution, stirred at room temperature for 24 hours, dried by an infrared lamp, and then immersed in a certain amount of 0.3mol L -1 Co(NO 3 ) 3 In the solution, stir at room temperature for 16 hours, dry with an infrared lamp, bake at 300°C for 5 hours, and cool to room temperature to obtain an unreduced catalyst. When the catalytic reaction is carried out, the catalyst is heated at 400°C in H 2 The atmosphere was reduced for 5h to obtain an activated catalyst, and then the catalytic reaction was carried out.

[0014] Preparation of cinnamyl alcohol

[0015] Dissolve 100g of cinnamaldehyde in 300g of isopropanol solvent, add 5g of catalyst, heat up to 170°C, and pass 1MPa of H 2 , after reacting for 5 hours, the material was...

Embodiment 2

[0017] Catalyst preparation

[0018] Soak 100g of activated clay in 200ml of 0.2mol L -1 Fe(NO 3 ) 3 solution, stirred at room temperature for 24 hours, dried by an infrared lamp, and then immersed in a certain amount of 0.1mol L -1 Zn(NO 3 ) 2 solution, stirred at room temperature for 24 hours, dried by an infrared lamp, and then immersed in a certain amount of 0.1mol L -1 Co(NO 3 ) 3 In the solution, stir at room temperature for 16 hours, dry it with an infrared lamp, bake it at 500°C for 5 hours, and cool to room temperature to obtain the unreduced catalyst. When the catalytic reaction is carried out, the catalyst is heated at 400°C in H 2 The atmosphere was reduced for 5h to obtain an activated catalyst, and then the catalytic reaction was carried out.

[0019] Preparation of cinnamyl alcohol

[0020] Dissolve 100g of cinnamaldehyde in 800g of isopropanol solvent, add 20g of catalyst, heat up to 150°C, and pass 3MPa of H 2 After reacting for 5 hours, the materia...

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Abstract

The invention relates to a method for preparing cinnamyl alcohol. The method comprises the following steps of: dissolving cinnamyl alcohol into an isopropanol solution; adding a catalyst; heating up to 100-170 DEG C, and then introducing H2 of 1-3MPa; reacting for 2-5 hours; reducing the pressure and discharging; filtering out the catalyst and evaporating out the solvent; and separating cinnamyl aldehyde from the cinnamyl alcohol to obtain the cinnamyl alcohol, wherein the used catalyst is a Co-Fe-Zn / active carclazyte loaded type catalyst. The method has the advantages of high yield, easiness of operation, and the like.

Description

technical field [0001] The invention relates to a preparation method of cinnamyl alcohol. Background technique [0002] Cinnamaldehyde is a representative compound among α, β-unsaturated aldehydes. The selective hydrogenation of cinnamaldehyde to cinnamyl alcohol involves the competitive hydrogenation of C-C bonds and C-O bonds. It is not only theoretically meaningful, but also With practical application value, the heterogeneous selective hydrogenation of α, β-unsaturated aldehydes on supported metal catalysts has attracted more and more attention of catalysis researchers. Generally, the catalyst systems studied are based on noble metal catalysts, and some noble metals have a high load. Nitta et al. studied the supported cobalt catalyst and found that the selectivity of α, β-unsaturated alcohols is very high, but the catalyst The load capacity is as high as 40%. [0003] The invention adopts Co-Fe-Zn / activated clay as a catalyst to selectively hydrogenate cinnamaldehyde to...

Claims

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Application Information

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IPC IPC(8): C07C33/32C07C29/141B01J23/80
Inventor 尹华芳
Owner 尹华芳
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