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Method for producing biodiesel oil and C22-cyclic fatty triacid ester by using natural oil

A technology of fatty acid triesters and natural oils, which is applied in the fields of fatty acid esterification, fatty acid production, fatty acid chemical modification, etc.

Inactive Publication Date: 2012-12-26
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the current market is concerned, natural oils and fats cannot be used as raw materials for normal production of biodiesel because the price of raw materials is higher than that of biodiesel products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 500mL four-necked flask, add 300 grams of dried cottonseed oil and 31 grams of methanol (the molar ratio of oleyl to alcohol is 1:3), stir and heat until the reflux temperature of methanol is about 65°C, add 3 grams of solid alkali CaO, The reaction was refluxed for 3 hours. After the reaction was over, excess methanol was distilled off. The reaction solution was filtered while hot to separate the catalyst, and then the filtrate was poured into a separatory funnel and allowed to stand overnight to separate layers. Separate the lower floor by-product glycerol to obtain 288 grams of fatty acid methyl esters. Chromatographic detection of fatty acid methyl ester content was 96.5%.

[0025] The above-mentioned 288 grams of fatty acid methyl ester (the mass content of methyl linoleate is 55.7%), and 70.7 grams of dimethyl maleate (molar ratio of diester / linoleate = 0.9) were added to a In a three-necked flask with a thermometer and a stirrer, 0.3 g of iodine was added...

Embodiment 2

[0027] In a 500mL three-necked flask equipped with a vacuum dehydration device, a thermometer and a reflux condenser, add 300 grams of rapeseed oil, heat to 120°C, dehydrate under reduced pressure for 1~2 hours, cool to 50°C, add 150 grams of ethanol (oleyl alcohol The molar ratio is 1:10), 2.5 grams of potassium hydroxide, reflux reaction for 5 hours, end the reaction, distill off the excess ethanol, cool to 50°C, then pour it into the separating funnel and let it stand for stratification, and separate the lower by-product glycerin , to obtain 298 grams of fatty acid ethyl ester. The fatty acid ethyl ester content detected by chromatography was 95.4%.

[0028] Put the above 298 grams of fatty acid ethyl ester (the mass content of methyl linoleate is 23.5%) and 51.8 grams of dibutyl maleate (the molar ratio of diester / linoleate = 1.0) into a thermometer, In a three-necked flask with a stirrer, 2 grams of activated clay was added, heated to 280° C. under nitrogen protection, a...

Embodiment 3

[0030] In a 500mL three-necked flask equipped with a vacuum dehydration device, a thermometer and a reflux condenser, add 300 grams of waste cooking oil, heat to 120°C, dehydrate under reduced pressure for 1~2 hours, cool to 50°C, add 83.5 grams of methanol (oleyl alcohol The molar ratio is 1:8), 2.5 grams of 98% concentrated sulfuric acid, after reflux for 5 hours, the reaction is terminated, the excess methanol is distilled off, cooled to 50°C, then poured into a separatory funnel to stand for stratification, and the lower by-products are separated Glycerol, to obtain 290 grams of fatty acid methyl esters. The content of fatty acid methyl ester detected by chromatography was 94.4%.

[0031] Add the above 290 grams of fatty acid methyl ester (the mass content of methyl linoleate is 47.2%) and 174 grams of dioctyl maleate (the molar ratio of diester / linoleate = 1.1) to a thermometer, Add 0.5 g of iodine to a three-necked flask with a stirrer, heat to 220° C. under nitrogen pr...

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Abstract

The invention discloses a method for producing biodiesel oil and C22-cyclic fatty triacid ester by using natural oil, and belongs to the technical field of biodiesel oil. The method comprises the following steps of: performing ester exchange reaction on the natural oil and lower alcohol (containing 1 to 3 carbons), heating the fatty acid ester serving as an ester exchange product and dimaleate under the protection of nitrogen and in the presence of a cyclo-addition catalyst to the temperature of between 160 and 280 DEG C, and reacting for 3 to 12 hours; and cooling to the temperature of between 120 and 240 DEG C after reaction, vacuumizing, keeping the vacuum degree of over 750mmHg, and distilling under reduced pressure, wherein the distillate is the biodiesel oil (fatty acid ester) and the residue is the C22-cyclic fatty triacid ester. By utilizing the characteristics that the structure of the fatty acid ester has two or more double bonds, the C22-cyclic fatty triacid ester serving as a chemical product with high additional value is produced when the biodiesel oil is prepared, so that the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of biodiesel preparation, and in particular refers to the joint production of biodiesel and C by using natural oils and fats. 22 - Method of cycloaliphatic triesters. Background technique [0002] With the continuous consumption of petroleum resources and the increasing awareness of environmental protection, it has become an inevitable trend and direction to use natural oil as raw material to partially replace petroleum to produce fuel and chemical products. The main problem currently restricting the industrialization of biodiesel in my country is the high production cost, of which the cost of raw materials accounts for about 75%, and the profits that enterprises can create are very limited. As far as the current market is concerned, natural oils and fats cannot be used as raw materials for normal production of biodiesel because the price of raw materials is higher than that of biodiesel products. Consider...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/00C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 王车礼程兴荣黄泽恩尹芳华周永生张伟明肖达明杨锦梁
Owner CHANGZHOU UNIV
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