Unlock instant, AI-driven research and patent intelligence for your innovation.

A fine separation method of c18 series and c20-c22 series fatty acid methyl esters

A technology for the fine separation of fatty acid methyl esters, applied in fatty acid esterification, fatty acid preparation/refining, fatty acid production, etc., can solve the problems of low separation purity, raw material deterioration, poor heat sensitivity, etc., and achieve simple and convenient operation and excellent reaction conditions Gentle, easy recycling effect

Active Publication Date: 2018-07-24
天津领碳能源环保科技有限责任公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the separation of long-chain fatty acid methyl esters, common methods include traditional rectification, urea inclusion, supercritical extraction, and low-temperature cryocrystallization, etc., but the separation purity of the above methods is generally not high, and usually only relatively high-purity saturated fatty acids can be obtained Methyl esters and unsaturated fatty acid methyl ester products, but it is almost impossible to obtain a single high-purity fatty acid methyl ester, especially for methyl stearate, methyl oleate and methyl linoleate, few people do it
figure 1 (a) is methyl palmitate (C16:0); (b) is methyl stearate (C18:0); (c) is methyl oleate (C18:1); (d) is linseed oil Acid methyl ester (C18:2), through figure 1 It can be seen that the difference in the structure of the latter three is only one to two double bonds, which results in very little difference in physical and chemical properties between the latter three, and conventional separation methods are rarely able to completely separate the three substances. separated; figure 2 (a) is eicosapentaenoic acid methyl ester (C20:5); (b) is docosahexaenoic acid (C22:6), through figure 2 It can be seen that methyl eicosapentaenoate and methyl docosahexaenoate belong to fatty acid methyl esters with long carbon chains and polyunsaturated bonds. Separation methods such as distillation and supercritical extraction are easy to cause deterioration of raw materials, but it is almost impossible to effectively separate the two through urea inclusion and low temperature freezing crystallization
In summary, methyl stearate, methyl oleate and methyl linoleate or methyl eicosapentaenoate and methyl docosahexaenoate are completely separated to obtain a single The technology of fatty acid methyl ester is rarely reported, which seriously hinders the further research and application of high-purity and high value-added fatty acid methyl ester

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A fine separation method of c18 series and c20-c22 series fatty acid methyl esters
  • A fine separation method of c18 series and c20-c22 series fatty acid methyl esters

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] (a) preparation of column chromatography stationary phase, concrete steps are:

[0035] Take silica gel with a particle size of 200-300 mesh and put it in a container, then add absolute ethanol to it, the mass ratio of silica gel to absolute ethanol is 1:3-1:2; then stir the silica gel and ethanol in the container to form a silica gel suspension; AgNO 3 The crystals were dissolved in ethanol-water solution with a volume ratio of ethanol to water of 7:3 to 1:2 under dark conditions to obtain AgNO 3 AgNO with a mass fraction of 10% to 30% 3 - ethanol-water solution; will dissolve AgNO 3 Add the above-mentioned ethanol-water solution into the silica gel suspension prepared above, and stir for 20-40 minutes under dark conditions; take out the mixed silver nitrate silica gel suspension and put it into a container wrapped in aluminum foil, and put the container with a rotary evaporator Connection, rotary evaporation at 70-100°C and a vacuum of 0.01-0.1MPa for 4-5 hours to ...

Embodiment 1

[0042] The raw material used in this example is a vegetable oil with high acid value, and the acid value is 27.7 mgKOH / g as measured by the national standard GB-T5530-2005 method.

[0043] (1) The pretreatment of high acid value vegetable oil, concrete steps are:

[0044] (a) The ionic liquid [BHSO with a mass ratio of 1:4:41 3 MIM]HSO 4 1. High acid value vegetable oil and methanol are added to the reaction container; the reaction container is placed in a 65°C water bath, and the mixed solution in the container is stirred until the high acid value vegetable oil and methanol fully react under the catalysis of the ionic liquid;

[0045] (b) After the reaction is finished, separate the ionic liquid and the pretreatment product of various fatty acid methyl ester mixtures by decantation, and the various fatty acid methyl ester mixtures are biodiesel;

[0046] (c) After removing a small amount of methanol and water by rotary evaporation at 130° C., the separated ionic liquid was ...

Embodiment 2

[0056] The raw material used in this example is industrial waste palm oil, and the acid value measured by the national standard GB-T5530-2005 method is 9.53mgKOH / g.

[0057] (1) Pretreatment of industrial waste palm oil, the specific steps are:

[0058] (a) The ionic liquid with a mass ratio of 1:3:36 [(CH 2 ) 3 SO 3 HMIM][HSO 3 ], industrial waste palm oil and methanol are added to the reaction container; the reaction container is placed in a 50°C water bath, and the mixed solution in the container is stirred until the industrial waste palm oil and methanol fully react under the catalysis of the ionic liquid;

[0059] (b) After the reaction is finished, separate the ionic liquid and the pretreatment product of various fatty acid methyl ester mixtures by decantation, and the various fatty acid methyl ester mixtures are biodiesel;

[0060] (c) After the separated ionic liquid is rotatated at 90°C to remove a small amount of methanol and water, it is recovered and reused; th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
acid valueaaaaaaaaaa
acid valueaaaaaaaaaa
Login to View More

Abstract

The invention discloses a fine separation method of C18 series and C20-C22 series fatty acid methyl esters. The method uses an ionic liquid catalyst to pretreat animal and vegetable oils, and the obtained product is biodiesel, which is a product of various fatty acid methyl esters. mixture, and then the resulting biodiesel is subjected to vacuum distillation to obtain C18 fatty acid methyl esters or C20-C22 fatty acid methyl esters, and the obtained fatty acid methyl esters can be purified by silver ion-modified silica gel column chromatography to obtain stearic acid respectively Methyl esters, methyl oleate and methyl linoleate or methyl eicosapentaenoate and methyl docosahexaenoate. The invention makes up for the gaps in the prior art, has convenient operation procedures, provides an operation process for the separation and purification of long-chain fatty acid methyl esters with the same carbon number but different double bond numbers and poor thermal sensitivity, and lays a foundation for the fine separation of fatty acid methyl esters.

Description

technical field [0001] The invention relates to a method for finely separating C18 series and C20-C22 series fatty acid methyl esters, especially to obtain eicosapentaenoic acid methyl ester, docosahexaenoic acid methyl ester or Separation and purification method of methyl stearate, methyl oleate and methyl linoleate. Background technique [0002] my country has a vast territory and abundant natural resources, among which there are a large number of fatty acid resources of great value to people's production and life, such as C18 series fatty acids, and omega-3 and omega-6 unsaturated fatty acids. C18 series fatty acids mainly include stearic acid (octadecanoic acid), oleic acid (9-octadecenoic acid) and linoleic acid (9,12-octadecadienoic acid), which are mainly found in vegetable oils , widely used in many fields such as additives, oil additives, surfactants, lubricants and other organic chemicals; ω-3, ω-6 unsaturated fatty acids mainly include eicosapentaenoic acid (EPA)...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/04C11C1/10
Inventor 丁辉齐金龙
Owner 天津领碳能源环保科技有限责任公司