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Preparation method of maleic anhydride grafted vegetable oil acid

A technology of vegetable oleic acid and maleic anhydride, applied in the field of materials, can solve the problems of industrial production limitation, high product cost and high reaction temperature, and achieve the effects of low cost, safe raw material and high product yield

Active Publication Date: 2014-03-26
山东艾孚特科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in this reaction: for example, when non-conjugated vegetable oleic acid and maleic anhydride undergo Alder-Ene reaction, a high activation energy is required in the absence of a catalyst, and the reaction temperature needs to be above 200°C [Oil and Soap, 18 / 19,23(1942); J.Am.Oil.Chem.Soc.,25,254(1948)]
And under high temperature reaction, reaction yield is also lower, usually below 50%.
At the same time, because the reaction temperature is high, the product is easily oxidized, and the color of the obtained product is dark, which seriously affects the application in the next step.
These factors lead to high product costs and limited industrial production, so a new technology is urgently needed to solve the existing problems and meet market demand

Method used

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  • Preparation method of maleic anhydride grafted vegetable oil acid
  • Preparation method of maleic anhydride grafted vegetable oil acid

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In a 1L reactor with a stirrer, a thermometer and a condensing reflux device, add 1mol vegetable oleic acid, 2mol maleic anhydride, 0.01mol dibutyltin dilaurate, 10g toluene, and pass through N 2 protection, under stirring conditions, the temperature was raised to 180°C, and the reaction was kept for 10 hours. After the reaction was completed, the unreacted maleic anhydride, vegetable oleic acid and solvent were evaporated under reduced pressure, the reaction yield was 75wt%, and the product was light yellow viscous liquid.

[0025] figure 1 Be the infrared spectrogram of product of the present invention, show in spectrogram: 1860 cm -1 、1781 cm -1 、1161cm -1 It is the characteristic absorption peak of maleic anhydride. From this it can be seen that maleic anhydride has been grafted onto vegetable oleic acid, and the product of the present invention has formed.

Embodiment 2

[0027] In a 1L reaction kettle with a stirrer, a thermometer and a condensing reflux device, add 1mol vegetable oleic acid, 1mol maleic anhydride, 0.005mol dibutyltin dilaurate, 10g toluene, and pass through N 2 protection, under stirring conditions, the temperature was raised to 150°C, and the reaction was kept for 5 hours. After the reaction was completed, the unreacted maleic anhydride, vegetable oleic acid and solvent were evaporated under reduced pressure. The reaction yield was 48wt%, and the product was light yellow viscous liquid.

Embodiment 3

[0029] In a 1L reaction kettle with a stirrer, a thermometer and a condensing reflux device, add 1mol vegetable oleic acid, 3mol maleic anhydride, 0.02mol dibutyltin dilaurate, 10g toluene, and pass through N 2 Protection, under the condition of stirring, the temperature was raised to 170°C, and the reaction was kept for 6 hours. After the reaction was completed, the unreacted maleic anhydride, vegetable oleic acid and solvent were evaporated under reduced pressure, the reaction yield was 68wt%, and the product was light yellow viscous liquid.

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Abstract

The invention discloses a preparation method of maleic anhydride grafted vegetable oil acid. The preparation method is characterized by comprising steps as follows: vegetable oil acid, maleic anhydride, a catalyst and a solvent are added into a reaction kettle and heated for an Alder-Ene reaction, unreacted raw materials and solvent are boiled off through pressure reduction after the reaction, and the maleic anhydride grafted vegetable oil acid is obtained. The preparation method is simple in process, raw materials are safe, non-toxic, easy to obtain and low in cost, the conditions are mild, and the obtained product is light in color and can be used for the next step, so that the industrialized implementation is facilitated.

Description

technical field [0001] The invention relates to a method for modifying vegetable oleic acid with maleic anhydride, in particular to a preparation method of maleic anhydride grafted vegetable oleic acid, which belongs to the field of material technology. Background technique [0002] Petroleum resources are the main energy source at present, and they are also the basic raw materials that currently occupy a leading position in the chemical industry. However, with the development of the global economy and the enhancement of people's awareness of environmental protection, as well as the aggravation of the oil resource crisis, especially after the oil crisis in the 1970s, People realize that petroleum resources are non-renewable, petrochemical products are difficult to biodegrade, and three wastes are seriously polluted in the process of petroleum refining and petrochemical industrial production. It is very dangerous to completely attach energy and organic chemical raw materials t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/60
CPCC07D307/60
Inventor 邢文国孟宪兴冯维春刘丽秀游淇李培培张立东唐晓婵
Owner 山东艾孚特科技有限公司
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