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Preparation method of iso-fatty acid methyl ester biodiesel

A technology of fatty acid methyl ester and biodiesel, which is applied in the preparation of carboxylate, the preparation of organic compounds, and biofuels, etc., can solve the problems of low temperature crystallization, unusable biodiesel, equipment corrosion, etc., and achieves atomic weight increase, excellent oxidation and The effect of hydrolytic stability

Inactive Publication Date: 2014-04-23
INNER MONGOLIA JINDI BIOMASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different raw materials also have a certain impact on the performance of the final biodiesel product. If the selected raw material has a high content of saturated fatty acids (such as cattle, sheep and other animal fats), the biodiesel produced must have a high freezing point, resulting in low-temperature crystallization and Gelling, so that this type of biodiesel cannot be used in the northern and severe cold regions
If the selected raw materials have high content of unsaturated fatty acids (such as soybean oil, sunflower oil and other vegetable oils), although the biodiesel produced has a lower freezing point, the lowest can reach -10°C, but because it contains a large number of unsaturated bonds, making This type of biodiesel has poor hydrolysis and oxidation stability, and there is a problem of corrosion to equipment

Method used

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  • Preparation method of iso-fatty acid methyl ester biodiesel
  • Preparation method of iso-fatty acid methyl ester biodiesel
  • Preparation method of iso-fatty acid methyl ester biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of catalyst

[0024] 1mol / L of BF 3 The solution was mixed with phosphotungstic acid at 65°C, BF 3 The molar ratio to phosphotungstic acid is 1:0.1. The mixed solution is loaded on Al2O3, wherein the carrier accounts for 90% by mass. Dry at 120°C for 12 hours, and bake at 450°C for 3 hours to prepare boron-phosphotungstic acid supported catalyst.

[0025] (2) Product synthesis

[0026] 10g cottonseed oil biodiesel and catalyzer are joined in the reactor, and catalyst consumption is 0.5g, feeds methane gas, unsaturated fatty acid methyl ester (methyl oleate, methyl linoleate and 16 carbenoic acid methyl ester) at a molar ratio of 40:1, at a pressure of 6 MPa, at a reaction temperature of 90°C, and for 2 hours to prepare heterogeneous cottonseed oil biodiesel. Using the above synthesis method, 10 g of cottonseed oil biodiesel was replaced with 10 g of soybean oil biodiesel and 10 g of rapeseed oil biodiesel, and other conditions remained unchanged, to...

Embodiment 2

[0030] (1) Preparation of catalyst

[0031] Mix 1mol / L phosphoric acid solution with phosphotungstic acid at 65°C, the molar ratio of phosphoric acid to phosphotungstic acid is 1:0.1. The mixed solution was loaded on diatomaceous earth, wherein the carrier accounted for 90% by mass. Dry at 120°C for 12 hours, and bake at 450°C for 3 hours to prepare the phosphoric acid-phosphotungstic acid supported catalyst.

[0032] (2) Product synthesis

[0033] 10g cottonseed oil biodiesel and catalyzer are joined in the reactor, and catalyst consumption is 0.5g, feeds propane gas, unsaturated fatty acid methyl ester (methyl oleate, methyl linoleate and 16 The molar ratio of methyl carbenoate) was 10:1, the pressure was 6MPa, the reaction temperature was 120°C, and the reaction was performed for 2 hours to obtain isomerized cottonseed oil biodiesel. Using the above synthesis method, 10 g of cottonseed oil biodiesel was replaced with 10 g of soybean oil biodiesel and 10 g of rapeseed oil...

Embodiment 3

[0037] (1) Preparation of catalyst

[0038] 1mol / L of BF 3 The solution is mixed with silicotungstic acid at 65°C, BF 3 The molar ratio to phosphotungstic acid is 1:0.1. The mixed solution was loaded onto silica, wherein the carrier accounted for 80% by mass. Dry at 120°C for 12 hours, and bake at 450°C for 3 hours to prepare boron-silicotungstic acid supported catalyst.

[0039] (2) Product synthesis

[0040] 10g cottonseed oil biodiesel and catalyzer are joined in the reactor, and catalyst consumption is 0.5g, feeds ethane gas, unsaturated fatty acid methyl ester (methyl oleate, linoleate and methyl oleate in methane and cottonseed oil biodiesel 16 decenoic acid methyl ester) with a molar ratio of 20:1, a pressure of 8 MPa, a reaction temperature of 120°C, and a reaction time of 2 hours to obtain isomerized cottonseed oil biodiesel. Using the above synthesis method, 10 g of cottonseed oil biodiesel was replaced with 10 g of soybean oil biodiesel and 10 g of rapeseed oil...

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Abstract

The invention relates to a preparation method of iso-fatty acid methyl ester biodiesel. The preparation method is characterized in that the iso-fatty acid methyl ester biodiesel is prepared by treating fatty acid methyl ester biodiesel serving as a raw material and gas alkane on an acid supported catalyst through an alkylation process, wherein the using amount of the acid supported catalyst is 2-10 percent by weight of fatty acid methyl ester; the molar ratio of the gas alkane to unsaturated methyl ester in the fatty acid methyl ester is (10-40):1; the pressure control range is 6-8MPa; the temperature is 90-130 DEG C; the reaction time is 2-4 hours. The preparation method has the advantages that the prepared product is low in condensability and excellent in oxidation and hydrolytic stability, the condensation point is lowered by 10-30 DEG C than before reaction, and the oxidation stability is enhanced by over one time; by adopting the product prepared with the method, the defects of the existing biodiesel are overcome, and the product performances are superior to those of commercialized products and the other currently-researched alternative energy sources. The product can become a safe and reproducible high-end synthetic diesel product.

Description

technical field [0001] The invention belongs to the field of renewable energy utilization, in particular to a method for preparing isomerized fatty acid methyl ester biodiesel. Background technique [0002] With the increasingly serious global energy shortage and environmental deterioration, controlling vehicle exhaust emissions and protecting the natural environment on which human beings live have become urgent problems for human beings to solve. From the perspective of environmental protection and resource strategy, energy researchers all over the world are actively exploring the development of alternative fuels and renewable energy sources, biodiesel is one of them, and it is based on aquatic plants such as oil crops, wild oil plants and engineered microalgae. Grease, animal fat, food waste oil, etc. are made of raw material oil. It is a renewable energy source with good lubricity, safety, and combustion performance. It is biodegradable. After use, the emission of sulfide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/02C07C69/24C07C67/347
CPCY02E50/13Y02E50/10
Inventor 颉二旺张维
Owner INNER MONGOLIA JINDI BIOMASS
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