Method for producing biodiesel from grease raw material with high acid value

A high acid value oil, biodiesel technology, applied in the biofuel, fuel, petroleum industry and other directions, can solve the problems of air pollution, the limited reduction of the freezing point of biodiesel, the significance of reducing the clean energy of biodiesel, etc. Environmental pollution, beneficial effect of waste utilization

Inactive Publication Date: 2014-12-10
深圳市贝壳能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of pour point depressants not only has a limited range of depressing the freezing point of biodiesel, but also usually contains nitrogen, phosphorus, sulfur and other heteroatoms, which will pollute the air during the combustion process and reduce the significance of biodiesel as a clean energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 100g of oil raw material with an acid value of 40mgKOH / g, wherein the fatty acid content is 20g, weigh 13.15g of glycerin, and the molar ratio of glycerol to fatty acid is 2: 1; 8% of the mass; 100g of high acid value oil raw material, 13.15g of glycerin and 9.1g of ionic liquid catalyst were added in a 500ml reactor, and the vacuum reaction was carried out at 120°C and a pressure of 10.0KPa for 3 hours; after the reaction, the reaction temperature was lowered to Stand at room temperature and stratify, the upper layer is low acid value oil after esterification, the acid value after detection is 0.5mgKOH / g, and the yield is 103.6g; the lower layer is non-transglycerin and ionic liquid catalyst, which are recycled.

Embodiment 2

[0036]Weigh 100g of oil raw material with an acid value of 80mgKOH / g, wherein the fatty acid content is 40g, weigh 52.57g of glycerin, and the molar ratio of glycerol to fatty acid is 4: 1; 15% of the mass; 100g of high acid value oil raw material, 52.57g of glycerin and 22.89g of ionic liquid catalyst were added in a 500ml reactor, and the vacuum reaction was carried out at 130°C and a pressure of 100.0KPa for 3 hours; after the reaction, the reaction temperature was lowered to Stand at room temperature and stratify, the upper layer is low acid value oil after esterification, the acid value after detection is 0.3mgKOH / g, and the yield is 108.4g; the lower layer is non-transglycerin and ionic liquid catalyst, which are recycled.

Embodiment 3

[0038] Weigh 100g of oil raw material with an acid value of 160mgKOH / g, wherein the fatty acid content is 80g, weigh 157.72g of glycerin, and the molar ratio of glycerol to fatty acid is 6: 1; 30% of the mass; 100g of high acid value oil raw material, 157.72g of glycerin and 77.32g of ionic liquid catalyst were added in a 500ml reactor, and the vacuum reaction was carried out at 140°C and a pressure of 200.0KPa for 3 hours; after the reaction, the reaction temperature was lowered to Stand at room temperature and stratify, the upper layer is low acid value oil after esterification, the acid value after detection is 0.2mgKOH / g, and the yield is 116.3g; the lower layer is non-transglycerin and ionic liquid catalyst, which are recycled.

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Abstract

The invention provides a method for producing biodiesel from a grease raw material with a high acid value, which has the advantages of mild conditions, clean process and no corrosion to a device. The method is characterized by reacting glycerol instead of lower alcohols (for example methanol and ethanol) with fatty acid in presence of an acidic ionic liquid without corrosion to the device to obtain a mixture of monoglyceride, diglyceride or triglyceride, removing water generated in the reaction out of the reaction system to break the chemical equilibrium of the reaction, and then under the action of a basic catalyst, carrying out ester change reaction on the esterified products with the low acid values by virtue of a mixture of methanol, isopropanol or isobutanol to produce biodiesel (fatty acid esters) with the low acid value and a low condensation point. The ionic liquid is recycled and the process cleanness is achieved.

Description

[0001] This application is a divisional application with an application date of December 9, 2011, an application number of 201110408006.9, and an invention title of "A Method for Producing Biodiesel Using High-Acid Value Oil Raw Materials". technical field [0002] The invention relates to a method for producing biodiesel. More specifically, it is a new method of using ionic liquids to catalyze high acid value oil raw materials to produce low acid value and low freezing point biodiesel. Background technique [0003] Non-renewable resources such as fossil energy such as petroleum, coal, and natural gas are gradually being consumed, and renewable energy sources such as biofuels based on biomass are receiving increasing attention. Among them, biodiesel (a variety of fatty acids) produced from animal and vegetable oils and methanol The mixture of methyl esters) has attracted the attention of countries all over the world. [0004] At present, there are many biodiesel technologie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11C3/06C11C3/10C10L1/02
CPCY02E50/10
Inventor 姚志龙陈湧庆孙培永
Owner 深圳市贝壳能源科技有限公司
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