Production process and production system for preparing series of perfumes by hydrogenating citral

A production process, citral technology, applied in hydrogenation preparation, carbon-based compound preparation, hydroxyl compound preparation, etc., can solve the problems of low reaction selectivity, poor market adaptability, etc., to maximize profits, improve market adaptability, The effect of flexible response to market changes

Active Publication Date: 2018-05-01
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In conclusion, how to solve technical problems such as poor market adaptability and low reaction selectivity in the process of producing spices with citral as raw material in the prior art is one of the technical difficulties that need to be broken through in this field at present.

Method used

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  • Production process and production system for preparing series of perfumes by hydrogenating citral
  • Production process and production system for preparing series of perfumes by hydrogenating citral
  • Production process and production system for preparing series of perfumes by hydrogenating citral

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This example provides a production system for producing a series of spices by hydrogenation of citral. The production system comprises a first reactor 1 and a second reactor 2, wherein the first reactor 1 is an equipment for preparing nerol and geraniol by the hydrogenation reaction of citral, and the second reactor 2 is for the hydrogenation of citral Equipment for preparing citronellal, geraniol and dihydrocitronellol by reaction. It also includes a first regulating valve for adjusting the input amount of citral in the first reactor 1, by adjusting the regulating valve to regulate the input amount of citral in the first reactor 1, thereby controlling its production load. It also includes a second regulating valve for adjusting the input amount of citral to the second reactor 2, by adjusting the regulating valve to adjust the input amount of citral to the second reactor 2, thereby controlling its production load. Preferably, the first regulating valve and the second r...

Embodiment 2

[0042] Example 2 is produced using the production system of Example 1.

[0043] Through market research, it is found that the market demand and price of nerol and geraniol are higher than that of citronellal, citronellol and dihydrocitronellol, so the production process of embodiment 2 mainly starts the first reactor 1 in the production system And the first rectifying tower 4.

[0044] The preparation of the catalyst I used in this embodiment comprises the following steps: using activated clay (purchased from Anji Zhongxin Activated Clay Co., Ltd., HT series activated clay) as a carrier, with nickel as an active component, and with P and Zn as catalyst promoters agent, wherein phosphoric acid is used as the phosphorus source, and zinc chloride is used as the zinc source. Dilute phosphoric acid into a 10wt% aqueous solution, impregnate activated clay with phosphoric acid overnight at room temperature, then dry at 80°C for 5 hours, then dissolve nickel chloride and zinc chlorid...

Embodiment 3

[0048] Embodiment 3 is produced using the production system of Embodiment 1.

[0049] Through market research, the market demand and price of nerol and geraniol are higher than citronellal, citronellol and dihydrocitronellol, so the production technology of embodiment 3 mainly uses the first reactor 1 and the first rectification Tower 4.

[0050] Load catalyst I in the first reactor 1,, based on the quality of catalyst I, wherein Ni loading (wt%) is 10.0%, P loading (wt%) is 5.0%, Zn loading (wt%) 5.0% , the carrier of the catalyst I is activated clay (same as Example 2, being HT series activated clay). Catalyst 1 of this embodiment was prepared with reference to the method of Example 2, and will not be repeated.

[0051] The first reactor 1 was operated at 200° C., reaction pressure 5 MPa, and citral flow rate 20 mol / h. The product was analyzed by chromatography, the conversion rate of citral was 96%, and the total selectivity of nerol and geraniol was 97%. The product is...

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Abstract

The invention provides a production process and a production system for preparing a series of perfumes by hydrogenating citral. The production process comprises the following steps: adjusting the input amount of the citral of a first reactor and a second reactor, performing hydrogenation reaction on the citral input in the first reactor to prepare nerol and geraniol, and performing hydrogenation reaction on the citral input in the second reactor to prepare citronellol, citronellal and dihydrogeraniol. According to the production process for preparing the series of perfumes by hydrogenating thecitral provided by the invention, the productivity of different citral hydrogenation products can be adjusted flexibly and high market strain capacity is achieved.

Description

technical field [0001] The invention relates to the field of preparing spices by hydrogenating citral as a raw material, in particular to a production process and a production system for preparing a series of spices by hydrogenating citral as a raw material. Background technique [0002] Citral (3,7-dimethyl-2,6-octadienal) has two cis-trans isomers and is an important open-chain monoterpene aldehyde. As an important raw material for spices and pharmaceutical intermediates, there are many types of citral hydrogenation reaction products (specifically, as shown in the chemical equation below), including nerol, geraniol, citronellol, citronellal, dihydrogen Maochun. These compounds have important application value and can expand the use of citral. [0003] [0004] As we all know, there is a certain complexity in the spice market, and the types and quantities of demand for spices in different periods are also different, and the prices of different spices are also affected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/62C07C47/21C07C29/141C07C29/17C07C33/02C07C33/025C07C31/125
CPCC07C29/141C07C29/172C07C29/175C07C45/62C07C47/21C07C33/02C07C33/025C07C31/125
Inventor 李康董菁张永振黎源王联防于磊沈元伟
Owner WANHUA CHEM GRP CO LTD
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