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Method for producing epoxy fatty acid methyl ester by using illegal cooking oil

A technology of epoxy fatty acid methyl ester and fatty acid methyl ester, which is applied in the direction of fatty acid esterification, fatty acid production, fatty acid chemical modification, etc., can solve the problem of single production method of epoxy soybean oil, no good economic and social benefits, and insufficient development space Large and other problems, to achieve the effect of good plasticizing effect, low odor and simple process

Inactive Publication Date: 2013-01-02
河北金谷增塑剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the epoxy plasticizer is mainly epoxy soybean oil, but the production method of epoxy soybean oil is single, the cost is high, the profit is low, there is no good economic and social benefits, and there is little room for development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Put 95% waste oil and 5% sulfuric acid into the reaction kettle by weight percentage, heat to 75-85°C, add methanol dropwise for esterification reaction, the methanol drop rate is 180kg / h, and the amount of methanol is 1 ton of waste water Oil 120kg, reaction time 8h, simultaneously reclaim and distill out the methanol after condensing and put into methanol rectification tower to recycle and use, after reaction finishes, separate the glycerol of lower layer, add its weight 5% sodium hydroxide to neutralize in upper layer liquid Surplus sulfuric acid, let stand to stratify again, the upper layer is crude fatty acid methyl ester;

[0018] (2) Purify the crude fatty acid methyl ester obtained in step (1) by molecular rectification, the distillation temperature is 200-220°C, the vacuum degree is 0.1-10Pa, and the colloid and plant asphalt are separated to obtain the purified fatty acid methyl ester ;

[0019] (3) Put the fatty acid methyl ester purified in step (2) int...

Embodiment 2

[0029] (1) Add 97% waste oil and 3% sulfuric acid into the reaction kettle by weight percentage, heat to 75-85°C, add methanol dropwise for esterification reaction, the methanol drop rate is 150kg / h, and the amount of methanol is 1 ton of waste water Oil 160kg, reaction time 10h, reclaim simultaneously the methanol after steaming and condensing is put into methanol rectification tower and reclaim and recycle, after reaction finishes, separate the glycerol of lower layer, add its weight 6% sodium hydroxide to neutralize in upper layer liquid Surplus sulfuric acid, let stand to stratify again, the upper layer is crude fatty acid methyl ester;

[0030] (2) Purify the crude fatty acid methyl ester obtained in step (1) by molecular rectification, the distillation temperature is 200-220°C, the vacuum degree is 0.1-10Pa, and the colloid and plant asphalt are separated to obtain the purified fatty acid methyl ester ;

[0031] (3) Put the fatty acid methyl ester purified in step (2) i...

Embodiment 3

[0034] (1) Add 99.8% waste oil and 0.2% sulfuric acid into the reaction kettle by weight percentage, heat to 75-85°C, add methanol dropwise for esterification reaction, the methanol drop rate is 200kg / h, and the amount of methanol is 1 ton of waste water Oil 140kg, reaction time 9h, reclaim simultaneously the methanol after steaming and condensing put into methanol rectification column and recycle and use, after the reaction finishes, separate the glycerol of lower layer, add its weight 8% sodium hydroxide to neutralize in the upper layer liquid Surplus sulfuric acid, let stand to stratify again, the upper layer is crude fatty acid methyl ester;

[0035] (2) Purify the crude fatty acid methyl ester obtained in step (1) by molecular rectification, the distillation temperature is 200-220°C, the vacuum degree is 0.1-10Pa, and the colloid and plant asphalt are separated to obtain the purified fatty acid methyl ester ;

[0036] (3) Put the fatty acid methyl ester purified in step ...

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Abstract

The invention relates to a method for producing epoxy fatty acid methyl ester by using illegal cooking oil, which comprises: subjecting illegal cooking oil and methanol to esterification to obtain fatty acid methyl ester; purifying the fatty acid methyl ester by molecular distillation and performing epoxidation; and subjecting the obtained crude fatty acid methyl ester to three-stage rectification to obtain three models of epoxy fatty acid methyl ester. In the invention, illegal cooking oil is used as a raw material, and esterification is performed under normal pressure; as the reaction temperature is higher than the boiling point of methanol, the methanol is gasified immediately upon contact with fat; and the methanol is uniformly, quickly and fully contacted with the fat, so the esterification speed is further improved. When the method is used, the illegal cooking oil waste is utilized, cost is saved, environment is protected, energy consumption is low, process is simple, operation is safe and product quality is high. Therefore, the method is a resource-saving and environment-friendly production method. The epoxide number of the obtained No.1 epoxy fatty acid methyl ester is 4.0to 5.0, the plasticizing effect of the epoxy fatty acid methyl ester is desirable, the acid value is smaller than 1, the saponification of plasticized products is avoided, a flashing point is above 180 DEG C, an iodine value is smaller than 3, and the epoxy fatty acid methyl ester passed the verification of quality supervision and inspection departments and are approved to be qualified.

Description

technical field [0001] The invention relates to a method for producing epoxy fatty acid methyl ester from waste oil. Background technique [0002] With the enhancement of human awareness of environmental protection, the toxicity of plasticizers has attracted more and more attention. Traditional phthalate plasticizers (DOP, DBP) have been banned in many foreign fields because of their carcinogenic potential. Banned, and emerging plasticizers such as citric acid esters and epoxy compounds are favored because of their environmental protection. At present, epoxidized soybean oil is the main epoxy plasticizer, but epoxidized soybean oil has a single production method, high cost, low profit, no good economic and social benefits, and little room for development. Epoxy fatty acid methyl ester is a new type of plasticizer, which has a broad market prospect due to its environmental protection, non-toxicity, anti-aging, transparency, excellent light and thermal stability. Contents o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/40C11C3/00C11C3/10C11C3/04C07C31/22C07C29/128
Inventor 赵敏仲孙达赵占群
Owner 河北金谷增塑剂有限公司