Technological method for preparing epoxy fatty acid methyl ester plasticizer with waste vegetable oil

A technology of epoxy fatty acid methyl ester and vegetable oil, which can be used in fatty acid esterification, fatty acid production, fatty acid chemical modification, etc.

Inactive Publication Date: 2012-02-08
肖连朝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional process of fatty acid methyl ester mainly uses vegetable oil under the action of acid to carry out esterification reaction with methanol to prepare fatty acid me

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The preparation process of the present embodiment comprises the following steps:

[0012] (1) After the waste vegetable oils such as mixed waste oil or tap water oil are removed from impurities, enter the distillation tower to directly carry out molecular distillation to remove fatty acids, so that the acid value of vegetable oils is neutral oils with an acid value of 0.8;

[0013] (2) Add 1% sodium methoxide and 20% methanol to the product of (1), slowly heat up to 66°C for 40 minutes while stirring, let stand for 25 minutes, discharge the crude glycerin to obtain fatty acid methyl ester, and the product is The rate is above 98%, and the ester content is above 99%;

[0014] (3) in (2) product, add 2% formic acid, slowly be warming up to 45 ℃ in stirring, start to drop 20% hydrogen peroxide reaction time and be 6.5 hours, obtain epoxy fatty acid methyl ester;

[0015] (4) After (3) product reaction is finished, add 15% sodium hydroxide liquid again and carry out neutra...

Embodiment 2

[0017] The preparation process of the present embodiment comprises the following steps:

[0018] (1) After the waste vegetable oils such as mixed waste oil or tap water oil are removed from impurities, enter the distillation tower to directly carry out molecular distillation to remove fatty acids, so that the acid value of vegetable oils is neutral oils of 1;

[0019] (2) Add 2% sodium methoxide and 22% methanol to the product of (1), slowly heat up to 68° C. and react for 45 minutes while stirring, let stand for 30 minutes, discharge crude glycerin, and obtain fatty acid methyl ester, and the product is obtained The rate is above 98%, and the ester content is above 99%;

[0020] (3) in (2) product, add 3% formic acid, slowly be warming up to 50 ℃ in stirring, start to drop 25% hydrogen peroxide reaction time and be 7 hours, obtain epoxy fatty acid methyl ester;

[0021] (4) after (3) product reaction is finished, add 20% sodium hydroxide liquid again and carry out neutraliza...

Embodiment 3

[0023] The preparation process of the present embodiment comprises the following steps:

[0024] (1) After the waste vegetable oils such as mixed waste oil or tap water oil are removed from impurities, enter the distillation tower to directly carry out molecular distillation to remove fatty acids, so that the acid value of vegetable oils is neutral oil of 1.2;

[0025] (2) Add 3% sodium methoxide and 25% methanol to the product of (1), slowly heat up to 70°C for 50 minutes while stirring, let stand for 35 minutes, discharge crude glycerin, and obtain fatty acid methyl ester, and the product is obtained The rate is above 98%, and the ester content is above 99%;

[0026] (3) add 4% formic acid in (2) product, slowly be warming up to 55 ℃ in stirring, start to drop 30% hydrogen peroxide reaction time and be 7.5 hours, obtain epoxy fatty acid methyl ester;

[0027] (4) After (3) product reaction is finished, add 25% sodium hydroxide liquid again and carry out neutralization, make...

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Abstract

The invention relates to a technological method for preparing an epoxy fatty acid methyl ester plasticizer with waste vegetable oil. The method comprises the steps of: subjecting impurity removed mixed swill-cooked dirty oil or catering hogwash oil and other waste vegetable oil to molecular distillation directly in a distillation column for removing fatty acid so as to convert the oil to neutral oil with an acid value of 0.8-1.2; then adding 1-3% sodium methoxide and 20-25% methanol, raising the temperature gradually to 66DEG C to 70DEG C under stirring for a reaction of 40-50min, leaving the oil to stand for 25-35min, and discharging crude glycerol, thus obtaining fatty acid methyl ester; then adding 2-4% formic acid, raising the temperature gradually to 45-55DEG C under stirring, starting to add 20-30% hydrogen peroxide dropwisely for a reaction of 6.5-7.5h, thus obtaining epoxy fatty acid methyl ester; then adding 15-25% sodium hydroxide liquid for neutralization so as to make the PH of the material ranging from 6.5 to 7.5, carrying out washing and distillation, thus obtaining the high-purity, non-toxic and colorless epoxy fatty acid methyl ester plasticizer. The preparation method of the invention has simple process and low cost, and can substitute o-benzene plasticizers to a greater degree.

Description

Technical field: [0001] The invention relates to a process for preparing a plasticizer, more specifically to a process for preparing a non-toxic and colorless plasticizer epoxy fatty acid methyl ester by using waste vegetable oils such as waste oil and drinking water oil. Background technique: [0002] Epoxy fatty acid methyl ester is a widely used non-toxic PVC plasticizer. In recent years, it has been discovered that o-phthalic plasticizers commonly used in PVC plastic products contain toxic and harmful carcinogens "DEHP" and "SVHC", which seriously endanger human health. Research and production of non-toxic plasticizers have become a major issue in the PVC industry. All needs, and epoxy fatty acid methyl ester is one of a new type of non-toxic plasticizers developed, which can effectively replace o-phthalic plasticizers in large quantities. However, the traditional process of fatty acid methyl ester mainly uses vegetable oil under the action of acid to carry out esterifi...

Claims

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Application Information

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IPC IPC(8): C11C3/00C11C3/10C08L27/06C08K5/1515
Inventor 肖连朝
Owner 肖连朝
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