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Technique for producing fatty acid methyl ester

A technology of fatty acid methyl ester and production process, which is applied in the field of producing high-content fatty acid methyl ester, can solve problems such as low product quality, impact on application range, quality discount of fatty acid methyl ester, etc., and achieve high economic value, high utilization value, and wide application The effect of use

Inactive Publication Date: 2008-07-09
江门市江海区嘉诺化工发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unsaponifiable matter, the quality of fatty acid methyl ester is greatly reduced, which affects its application range, and also makes the quality of the end product produced with this fatty acid methyl ester as an intermediate is low.

Method used

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  • Technique for producing fatty acid methyl ester
  • Technique for producing fatty acid methyl ester

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Embodiment Construction

[0012] The production process of fatty acid methyl ester is as follows: add 50% water to dilute the leftovers produced by refining oil, stir evenly and heat to 75°C, sieve to remove impurities to obtain acidified oil or crude fatty acid, take acidified oil or crude fatty acid 100 20 parts, add 20 parts of glycerin and put it in the reaction kettle for reaction, the temperature is controlled in the range of 210-230 °C, the vacuum pressure is 50kpa, the free fatty acid in acidified oil or crude fatty acid reacts with glycerin to form glycerol ester, and the reaction formula is as follows:

[0013]

[0014] The water and gas phase mixture produced by the reaction are separated by vacuum pumping. The unsaponifiable matter in acidified oil or crude fatty acid does not react with glycerin. The boiling points of unsaponifiable matter and glyceride are different, and the boiling point of a small amount of unreacted free fatty acid is lower than that of glyceride. Boiling point, incr...

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Abstract

The invention relates to a manufacturing technique of fatty acid ester, which employs polished fat to generate sulfated oil or crude fatty acids of leftovers. Glyceride is generated by the reaction of non-esterified fatty acid and glycerol, in the sulfated oil or the crude fatty acids, unsaponifiable doesn't react with glycerol, unsaponifiable and acylglycerol are seperated by employing the different boiling points of both, the boiling point of non-esterified fatty acid which does not react is lower than that of acylglycerol, and the non-esterified fatty acid which does not react is also separated, the purified acylglycerol is obtained, then, acylglycerol is used to react with methanol, and the fatty acid ester with relatively high purity can be obtained. sulfated oil and crude fatty acids are used to separate unsaponifiable via pre-esterification, the process of pre-esterification doesn't need catalyst, the content of the obtained fatty acid ester is not less than 98%, and the cost is low, and thereby the invention can be widely used in the field of biodiesel, fine chemicals and plasticizer. The invention not only recycles and reuses waste, but also decreases environmental pollution, simultaneously the invention has relatively high economic value.

Description

technical field [0001] The invention relates to a chemical production process, in particular to a process for producing high-content fatty acid methyl esters by using acidified oil or crude fatty acid produced as leftovers in the oil refining process. Background technique [0002] At present, due to the rising price of vegetable oil in the market, the cost of producing fatty acid methyl ester from refined oil is also rising. In this way, the development and utilization of the leftovers produced in the process of refining oil to produce fatty acid methyl ester not only has high economic value, but also can recycle waste and reduce environmental pollution, which is in line with the national sustainable development policy. [0003] The content of fatty acid methyl esters produced by the direct esterification of leftovers such as acidified oil or crude fatty acid and other refined oils is relatively low, because acidified oil or crude fatty acid contains 5-10% unsaponifiable mat...

Claims

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Application Information

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IPC IPC(8): C07C67/03C07C69/003
CPCY02E50/10
Inventor 曾庆旗邹云辉
Owner 江门市江海区嘉诺化工发展有限公司
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