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A method for catalytically preparing hyacinth

A technology for preparation of hyacinth and catalysis, which is applied in the field of catalysis, can solve the problems of unrecyclable catalysts, poor selectivity of hyacinth, and low conversion rate, etc., and achieve the effects of strong reaction activity, increased yield, and improved conversion rate

Active Publication Date: 2021-10-08
佛山市安你心香精香料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex process, low conversion rate, poor selectivity of hyacinth and unrecyclable catalyst in the prior art, the present invention discloses a method for catalytically preparing hyacinth by using magnetic ionic liquid. High activity, simple process, high reaction conversion rate, easy recycling of catalyst and high yield of hyacinth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for catalytically preparing hyacinth, mixing phenylethyl alcohol, acetal and deionized water in a molar ratio of 1:8:15 to obtain a mixed solution, stirring at room temperature for 10min, adding 10% of the weight of the mixed solution % magnetic ionic liquid, continue to stir and react for 20min, then stand still for 30min; the magnetic ionic liquid in the lower layer is directly recycled after being separated by a magnetic field; the mixed solution containing hyacinth in the upper layer is further separated and purified to obtain the hyacinth product and unreacted raw materials After analysis, the transformation rate of phenylethyl alcohol is 99.5%, and the productive rate of hyacinth is 98.6%.

[0032] Wherein, the magnetic ionic liquid is prepared through the following steps:

[0033] 1) Magnetic core CuFe 2 o 4 preparation of

[0034] FeCl 3 ·6H 2 O and Cu(Ac) 2 ·H 2 O was dissolved in ethylene glycol solution, and then sodium acetate and CTAB were a...

Embodiment 2

[0040] A method for catalyzing the preparation of hyacinth, mixing phenylethyl alcohol, acetal and deionized water in a molar ratio of 1:2:30 to obtain a mixed solution, stirring at room temperature for 15 minutes, adding 30% of the weight of the mixed solution % magnetic ionic liquid, continue to stir and react for 40min, then stand still for 30min; the magnetic ionic liquid in the lower layer is directly recycled after being separated by a magnetic field; the mixed solution containing hyacinth in the upper layer is further separated and purified to obtain the hyacinth product and unreacted raw materials After analysis, the transformation rate of phenylethyl alcohol is 97.5%, and the productive rate of hyacinth is 96.6%.

[0041] Wherein, the magnetic ionic liquid is prepared through the following steps:

[0042] 1) Magnetic core CuFe 2 o 4 preparation of

[0043] FeCl 3 ·6H 2 O and Cu(Ac) 2 ·H 2 O was dissolved in ethylene glycol solution, and then sodium acetate and ...

Embodiment 3

[0049] A method for catalytically preparing hyacinth, mixing phenylethyl alcohol, acetal and deionized water in a molar ratio of 1:5:20 to obtain a mixed solution, stirring at room temperature for 12 minutes, adding 7% magnetic The ionic liquid was stirred and reacted for 30 minutes, and then left to stand for 30 minutes; the magnetic ionic liquid in the lower layer was directly recycled after being separated by a magnetic field; the mixed solution containing hyacinth in the upper layer was further separated and purified to obtain the hyacinth product and unreacted raw materials; After analysis, the conversion rate of phenylethyl alcohol was 98.8%, and the yield rate of hyacinth was 97.5%.

[0050] Wherein, the magnetic ionic liquid is prepared through the following steps:

[0051] 1) Magnetic core CuFe 2 o 4 preparation of

[0052] FeCl 3 ·6H 2 O and Cu(Ac) 2 ·H 2 O was dissolved in ethylene glycol solution, and then sodium acetate and CTAB were added to it for ultraso...

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Abstract

The invention discloses a method for preparing hyacinth by using magnetic ionic liquid catalysis. The method is to stir a mixed solution of phenylethyl alcohol, acetal and deionized water at room temperature for 10 to 15 minutes, then add magnetic ionic liquid, and continue The reaction was stirred for 20-40 minutes, and then left to stand for 30 minutes; the magnetic ionic liquid in the lower layer was directly recycled after being separated by a magnetic field; the mixed solution containing hyacinth in the upper layer was further separated and purified to obtain hyacinth products and unreacted raw materials. The invention has the characteristics of high catalytic activity, simple process, high reaction conversion rate and high yield of hyacinth.

Description

technical field [0001] The technical field of catalysis of the present invention specifically relates to a method for preparing hyacinth by catalyzing a magnetic ionic liquid. Background technique [0002] The traditional synthesis of hyacinth mainly includes five main synthetic routes: addition of alcohol and vinyl alkyl ether, paraldehyde synthesis, α-chloroethyl ether method, alcohol exchange method and aldol method. The reaction of vinyl alkyl ether and alcohol to produce mixed alcohol acetal is recognized as the most important synthetic method, but the method has the disadvantages of high toxicity of vinyl ethyl ether and complicated preparation; the paraldehyde method is simple to operate and easy to obtain raw materials 1. The reaction is completed in one step, but there are many by-products, and the post-processing is troublesome; the legal reaction products of aldols are also many, and the post-processing is cumbersome; Phenylethyl alcohol and acetaldehyde diethyl ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/48C07C43/303B01J31/38B01J35/10
CPCB01J31/0285B01J31/38B01J35/0033B01J35/1004B01J2231/40C07C41/48C07C43/303
Inventor 王强
Owner 佛山市安你心香精香料有限公司
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