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Method for synthesizing isopropyl palmitate by catalyzing mucopolysacchariden functionalized ionic liquid

A technology of isopropyl palmitate and ionic liquid, which is applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve problems such as unfavorable clean production, complex production process, cumbersome operation control, etc., and achieve Simplified reaction conditions and process, simple recovery operation, good activity effect

Active Publication Date: 2018-09-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of SO 2 , HCl, H 2 SO 4 and other chemical substances, the above-mentioned method has strong toxicity and chemical corrosion, and the leak-proof and anti-corrosion requirements of the whole system are extremely strict, and there are complex production processes, large one-time investment, cumbersome operation control; high production cost, poor selectivity, side effects There are many shortcomings such as many reactions, poor product quality, and unfavorable clean production.

Method used

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  • Method for synthesizing isopropyl palmitate by catalyzing mucopolysacchariden functionalized ionic liquid
  • Method for synthesizing isopropyl palmitate by catalyzing mucopolysacchariden functionalized ionic liquid
  • Method for synthesizing isopropyl palmitate by catalyzing mucopolysacchariden functionalized ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of chloride ionic liquid (a)

[0027]

[0028] Add 0.2mol (15.8g) of pyridine and 0.21mol (37.0g) of 1-chloromethylnaphthalene into a 250mL single-necked flask, mix well, control the temperature at 80°C, and react with magnetic stirring for 8h. Wash with ethyl ester for 3-6 times, filter with suction, and dry in vacuum for 24 hours to obtain the chloride ionic liquid (a).

Embodiment 2

[0030] Preparation of ionic liquid (b)

[0031]

[0032] Get 98% sulfuric acid with a mass fraction of 0.2mol and join it in a 250mL three-necked flask, add 90ml CH 2 Cl 2 , under the condition of 0±5°C, add 48g (a) of dry treated ionic liquid chloride in batches, and stir. After feeding, continue to react at this temperature for 4h, then raise the temperature to 70°C for 6h, after the reaction is completed The reaction product was allowed to stand at room temperature, and the solvent was removed by rotary evaporation, then washed with ethyl acetate for 3 to 6 times, and finally vacuum-dried for 24 hours to obtain the ionic liquid (b).

Embodiment 3

[0034] Preparation of ionic liquid (c)

[0035]

[0036] Take 0.7mol chlorosulfonic acid and put it into a 250 three-necked flask, add 90ml CH 2 Cl 2 , under the condition of 0±5°C, 60 g of the ionic liquid in Example 2 was slowly added dropwise to a 250 mL three-necked flask, and stirred. The dropwise addition is completed within 1.5~3h. After the dropwise addition, continue to react at this temperature for 4h, and then raise the temperature to 70°C for 6h. After the reaction is completed, let the reaction product stand at room temperature, remove the solvent by rotary evaporation, and then add ethyl acetate to wash. 3-6 times, and finally vacuum-dried for 24 hours to obtain the ionic liquid (c).

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Abstract

The invention discloses a method for synthesizing isopropyl palmitate by catalyzing mucopolysacchariden functionalized ionic liquid. Palmitic acid and isopropyl are adopted as raw materials, the mucopolysacchariden functionalized ionic liquid is adopted as a catalyzer, and under the heating condition, direct esterification catalysis is performed to prepare isopropyl palmitate. Compared with a traditional sulfuric acid direct esterification method and acyl chloride method, no strict high corrosion resistance or anti-toxic and leakage-proof requirement is needed for a reaction system, toxic SO2,HCl and other gases are prevented, no large amount of wastewater is generated, the catalyzer is easily separated, reaction conditions and technology are simplified, side reactions are reduced, and the isopropyl palmitate is environmentally friendly, good in catalysis effect, free from or low in color and high in quality.

Description

technical field [0001] The invention relates to a method for synthesizing isopropyl palmitate through multisulfonic acid group functionalization catalysis, which belongs to the technical field of synthesis of ester compounds in organic chemistry. Background technique [0002] Isopropyl palmitate, also known as isopropyl palmitate (IPP), is a low-viscosity, lipophilic, non-ionic surfactant, colorless to light yellow oily liquid, non-volatile, flammable, and slightly oily taste. Soluble in alcohol, ether, methylene chloride, oil and other organic solvents, insoluble in water and glycerin. It has good spreadability, lubricity, moisture, moisture retention, air permeability, etc. Isopropyl palmitate has good compatibility with the skin and is easy to penetrate into the skin. It is an excellent skin emollient in skin care and cosmetics, which can make the skin soft and smooth without greasy feeling. Because of its excellent absorption and permeability, it is widely used in pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/24B01J31/02
CPCB01J31/0285C07C67/08C07C69/24
Inventor 郭红云施信尤志翔
Owner ZHEJIANG UNIV OF TECH
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