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High epoxide number environment-friendly plasticizer production process

A production process and environment-friendly technology, applied in the direction of fatty acid esterification, sulfonate ester preparation, organic chemistry, etc., can solve the problems of high price, unfavorable market expansion, unstable product quality, etc., and achieve easy access to process raw materials, The effect of simple equipment

Inactive Publication Date: 2012-06-20
扬州市双全塑胶材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product quality is unstable and the price is high, which is not conducive to expanding the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for preparing high epoxy value environment-friendly plasticizer of the present invention,

[0020] (1) Continuously enter 78.6% of refined cottonseed oil, 21% methanol (content 99.5%) and 0.4% sodium methoxide into the transesterification reactor for transesterification reaction. The reaction temperature is controlled at 85°C and the reaction time is 30 minutes. Mix fatty acid methyl ester and glycerin. The glycerol is separated by standing precipitation. Esterification rate is 99.2%, fatty acid methyl ester iodine value≤0.1, acid value≤0.5, moisture content≤0.1%, free oil≤2%.

[0021] (2) The mixed fatty acid methyl ester enters the packed rectification tower for rectification and separation. The top temperature of the tower is 190°C, the bottom temperature of the tower is 240°C, the vacuum degree is 0.09Mpa, and the reflux ratio is 2.

[0022] (3) Methyl oleate from the bottom of the rectification tower enters the epoxidation reactor, adding 001×7 type acid ion ...

Embodiment 2

[0028] Method for preparing environment-friendly plasticizer with high epoxy value in the present invention

[0029] (1) 80% refined cottonseed oil, 19.7% methanol (content 99.5%) and 0.3% sodium methoxide are continuously fed into the transesterification reactor for transesterification reaction. The reaction temperature is controlled at 80°C and the reaction time is 30 minutes. Mix fatty acid methyl ester and glycerin, stand still and precipitate to separate glycerin. Esterification rate is 99.5%, fatty acid methyl ester iodine value≤0.1, acid value≤0.5, moisture content≤0.1%, free oil≤2%.

[0030] (2) The mixed fatty acid methyl ester enters the packed rectification tower for rectification and separation. The top temperature of the tower is 195°C, the bottom temperature of the tower is 245°C, the vacuum degree is 0.09Mpa, and the reflux ratio is 4.

[0031] (3) Methyl oleate from the bottom of the rectification tower enters the epoxidation reactor, adding 001×7 type acid ion excha...

Embodiment 3

[0037] Method for preparing environment-friendly plasticizer with high epoxy value in the present invention

[0038] (1) Continuously enter 84.5% of refined cottonseed oil, 15.2% methanol (content 99.5%) and 0.3% sodium methoxide into the transesterification reactor for transesterification reaction. The reaction temperature is controlled at 90°C and the reaction time is 30 minutes. Mix fatty acid methyl ester and glycerin. The glycerol is separated by standing precipitation. Esterification rate is 99.3%, fatty acid methyl ester iodine value≤0.1, acid value≤0.5, moisture content≤0.1%, free oil≤2%.

[0039] (2) The mixed fatty acid methyl esters enter the packed rectification tower for rectification and separation. The top temperature of the tower is 175°C, the bottom temperature of the tower is 225°C, the vacuum degree is 0.09Mpa, and the reflux ratio is 5.

[0040] (3) Methyl oleate from the bottom of the rectification tower enters the epoxidation reactor, adding 001×7 acidic ion e...

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Abstract

The invention discloses a high epoxide number environment-friendly plasticizer production process. The production process comprises the following steps of: adding cottonseed oil, methanol and sodium methoxide into an ester exchange reactor for reaction to obtain mixed fatty acid methyl ester; adding into a rectifying tower for separation, and performing epoxidation, neutralization, washing and dehydration on methyl oleate obtained from the tower bottom to obtain a high epoxide number environment-friendly plasticizer; and performing sulfonation reaction on palmitic acid methyl ester obtained from the tower top and sulfur trioxide, and ageing, esterifying, neutralizing and drying to obtain an environment-friendly surfactant MES. By the production process, the raw materials are readily available, the process is advanced, equipment is simple, the high epoxide number plasticizer can be prepared, and the byproduct, namely the palmitic acid methyl ester can be used for producing the environment-friendly surfactant.

Description

Technical field [0001] The invention relates to a production process of an environment-friendly plasticizer with high epoxy value, and belongs to the chemical industry. Background technique [0002] As the world's awareness of environmental protection has increased, higher hygiene requirements have been put forward for plastic additives. In recent years, new application areas of vegetable oil-based plasticizers and new oxidation technologies (including double bonds) have become research hotspots. In recent years, production has continued to grow. The consumption of epoxy plasticizers has accounted for 9-10% of the total plasticizers. In the United States, its consumption is second only to phthalates and aliphatic dibasic acid esters, accounting for consumption The third place in volume. At present, the main varieties of industrial epoxidized plasticizers include: epoxidized soybean oil, epoxidized cottonseed oil, epoxidized rice bran oil, and epoxidized sunflower oil. Except fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/42C07D301/12C07C303/28C07C309/70C11C3/10
Inventor 孟继国王乃忠
Owner 扬州市双全塑胶材料厂
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