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Preparation method for phenyl heptadecane

A technology of phenylheptadecane and phenyloctadecanoic acid, which is applied in the field of production of β-mannanase, can solve the problems of high energy consumption, high temperature, and poor safety, and achieve low energy consumption, low price, and safety sex high effect

Active Publication Date: 2015-05-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned decarboxylation method requires higher temperature, higher energy consumption and poor safety

Method used

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  • Preparation method for phenyl heptadecane
  • Preparation method for phenyl heptadecane
  • Preparation method for phenyl heptadecane

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Take by weighing 9-phenyl octadecanoic acid or 10-phenyl octadecanoic acid 20g, catalyst 1.0g (mass ratio 20:1), join in the reactor, pass into N in the reactor 2 Gas for 20 minutes and seal the autoclave. Set the reaction temperature to 170°C, the reaction time to 6h, and the stirring speed to 300r / min. After the reaction, the obtained product was suction-filtered under reduced pressure, and after the catalyst was removed, 8-phenylheptadecane or 9-phenylheptadecane was obtained with a yield of 61.85%. The molecular structure of 9-phenylheptadecane is shown in figure 1 shown.

Embodiment 2

[0026] Take by weighing 9-phenyl octadecanoic acid or 10-phenyl octadecanoic acid 20g, catalyst 1.0g (mass ratio 20:1), join in the reactor, pass into N in the reactor 2 Gas for 20 minutes and seal the autoclave. Set the reaction temperature to 180°C, the reaction time to 6h, and the stirring speed to 300r / min. After the reaction, the obtained product was suction-filtered under reduced pressure, and the catalyst was removed to obtain 8-phenylheptadecane or 9-phenylheptadecane with a yield of 93.47%.

Embodiment 3

[0028] Take by weighing 9-phenyl octadecanoic acid or 10-phenyl octadecanoic acid 20g, catalyst 1.0g (mass ratio 20:1), join in the reactor, pass into N in the reactor 2 Gas for 20 minutes and seal the autoclave. Set the reaction temperature to 190°C, the reaction time to 6h, and the stirring speed to 300r / min. After the reaction, the obtained product was suction-filtered under reduced pressure, and the catalyst was removed to obtain 8-phenylheptadecane or 9-phenylheptadecane with a yield of 67.51%.

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Abstract

The invention relates to a preparation method for phenyl heptadecane. The preparation method comprises the following steps: (1) by taking 9-phenyl octadecanoic acid or 10-pheyl octadecanoic acid as a raw material, adding the raw material and a catalyst into a reaction kettle; (2) sealing the reaction kettle, heating, stirring and reacting to obtain 8-pheyl heptadecane or 9-pheyl heptadecane. Compared with the prior art, a synthesis raw material for alkyl benzene can be from modified oleic acid and is wide in source; the catalyst in decarboxylic reaction is hydrotalcite containing common metals and low in price; the reaction temperature is relatively low, the energy consumption is less and the safety is high; the reaction is complete, the side reactions are less, and the obtained 8-pheyl heptadecane or 9-pheyl heptadecane product is high in content.

Description

technical field [0001] The invention relates to a method for producing beta-mannanase, in particular to a method for producing low-temperature-resistant beta-mannanase by fermenting and culturing enterobacteria. Background technique [0002] Alkylbenzene (also known as phenylalkane) is an important class of industrial products, which are widely used in the surfactant industry, lubricating oil preparation, corrosion inhibitor preparation, heat transfer oil preparation and other industrial fields. [0003] In the prior art, alkylbenzenes are generally prepared by adding benzene and olefins. For example, the Chinese patent document with publication number CN1478766A discloses a preparation method of alkylbenzene. Alkylbenzenes are produced by circulating the alkylation, transition and transalkylation sections of the reactor. Olefins in raw materials are mainly obtained through petroleum cracking, which is relatively expensive. The method uses heteropolyacids and their salts ...

Claims

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Application Information

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IPC IPC(8): C07C15/107C07C1/20
Inventor 牟伯中杨世忠刚洪泽刘金峰卞鹏程
Owner EAST CHINA UNIV OF SCI & TECH
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