Method for esterification separation of by-product diesel oil of polyunsaturated fatty acid through selective fatty acid

A technology of unsaturated fatty acids and fatty acid esters, which is applied in the direction of fatty acid esterification, fatty acid production, fatty acid preparation/refining, etc., and can solve problems such as low efficiency, small scale, and high cost

Inactive Publication Date: 2017-01-25
合肥华盛生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high cost, small scale and low efficiency of these methods are only suitable for the food industry, but not suitable for the bulk chemical market

Method used

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  • Method for esterification separation of by-product diesel oil of polyunsaturated fatty acid through selective fatty acid
  • Method for esterification separation of by-product diesel oil of polyunsaturated fatty acid through selective fatty acid
  • Method for esterification separation of by-product diesel oil of polyunsaturated fatty acid through selective fatty acid

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Experimental program
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Effect test

Embodiment 1

[0029] The hydrolyzed microalgae free fatty acid ( Schizochytrium limacinum ） , Methanol (molar ratio 1:30) was added to the reactor, and a selective catalyst was added and heated to 85 degrees Celsius to start the reaction with stirring at 150rpm. The reaction mixture was taken out at regular intervals to measure the fatty acid ester content generated.

[0030] figure 1 It is shown that catalysts A, B and C have different selectivity effects. Catalysts A and B have strong selectivity to short-chain saturated fatty acids and low unsaturated fatty acids, but weak catalytic ability to PUFA (C22:5 and C22:6). The selectivity of catalyst C to different fatty acids is not as obvious as that of A and B. Moreover, the catalytic ability of catalyst C to PUFA (C22:5 and C22:6) was stronger than that of catalysts A and B.

[0031] After the reaction is over ( figure 1 A), 72% of C22:5 and C22:6 were still present in the form of free fatty acids, and their concentration in fr...

Embodiment ２

[0033] The hydrolyzed microalgae free fatty acid ( Nannochloropsis salina ） , Methanol (molar ratio 1:30) was added to the reactor, and a selective catalyst was added and heated to 85 degrees Celsius to start the reaction with stirring at 150rpm. The reaction mixture was taken out at regular intervals to measure the fatty acid ester content generated.

[0034] Figure 2 shows that catalysts A, B and C have different selectivity effects. Catalysts A and B have strong selectivity to short-chain saturated fatty acids and low unsaturated fatty acids, but weak catalytic ability to PUFA (C20:5 and C20:4). The selectivity of catalyst C to different fatty acids is not as obvious as that of A and B. Moreover, the catalytic ability of catalyst C to PUFA (C20:5 and C20:4) was stronger than that of catalysts A and B.

[0035] After the reaction is over ( figure 2 A), 78% of C20:5 and C20:4 were still present in the form of free fatty acids, and their concentration in free fatty a...

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Abstract

The invention provides a method for esterification separation of a by-product diesel oil of a polyunsaturated fatty acid through a selective fatty acid. A catalyst is used to selectively esterify a saturated fatty acid, but the polyunsaturated fatty acid is not catalyzed. After the reaction, the polyunsaturated fatty acid exists in a form of free fatty acid, but the saturated fatty acid is transformed into an ester of the fatty acid (biodiesel oil). Due to the great differences of the chemical structures of the free fatty acid and the ester of the fatty acid, the polyunsaturated fatty acid existing in the form of the free fatty acid is conveniently separated from the ester of the fatty acid, and the large-scale industrial production is implemented.

Description

technical field [0001] The invention designs a method for selectively esterifying saturated fatty acids, thereby realizing the separation of large-scale unsaturated fatty acids. More specifically, it is to convert saturated fatty acids and low unsaturated fatty acids into fatty acid esters, while highly unsaturated fatty acids will not be catalyzed. After the reaction is completed, it will be separated from free fatty acids (highly unsaturated fatty acids) and fatty acid esters . Background technique [0002] Omega 3 fatty acids (n-3 PUFA) have a wide range of biological applications. Microalgae contain high levels of n-3 PUFA. In recent years microalgae have also been used to produce fatty acids for the production of biofuels such as biodiesel. n-3 PUFA in microalgal diesel reduces its oxidative stability. Extracting PUFA from oil can not only improve the quality of oil, but also produce high value-added PUFA products. The separation of PUFA mainly relies on traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11C1/08C11C1/10C10L1/02
Inventor 董涛陈树林
Owner 合肥华盛生物科技有限公司
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