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Method for promoting delamination of biodiesel by using calcium magnesium zincum salts

A technology of biodiesel, calcium magnesium zinc, applied in biological raw materials, biofuels, refining with metal salts, etc., can solve the problems of low yield and large loss of fatty acid methyl esters

Inactive Publication Date: 2009-05-06
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the simple use of alkali-catalyzed transesterification to produce fatty acid methyl esters has large losses and low yields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 50Kg of acid-containing waste oil with an acid value of 10 into the reactor, add 10Kg of methanol, and 0.54Kg of sodium hydroxide, and stir at 60°C for 60 minutes. The reactants and products are not separated. After the reaction, 0.8Kg of calcium chloride was added, stirred at 60°C for 100 minutes, allowed to stand for stratification, and the upper biodiesel product was separated, and the upper layer product was washed and dried to obtain refined biodiesel with a yield of 93.7%.

Embodiment 2

[0016] Add 50Kg of acid-containing waste oil with an acid value of 7 into the reactor, add 10Kg of methanol, 0.43Kg of sodium hydroxide, and stir at 60°C for 60 minutes. The reactants and products are not separated. After the reaction, 0.K5g of magnesium chloride was added, stirred and reacted at 50°C for 90min, allowed to stand for stratification, and the upper layer biodiesel product was separated, and the upper layer product was washed and dried to obtain refined biodiesel with a yield of 95.6%.

Embodiment 3

[0018] Add 50Kg of acid-containing waste oil with an acid value of 8 into the reactor, add 10Kg of methanol, 0.67Kg of potassium hydroxide, and stir at 60°C for 60 minutes. The reactants and products are not separated. After the reaction, 1.2Kg of calcium nitrate was added, stirred and reacted at 50°C for 100min, allowed to stand for stratification, and the upper layer biodiesel product was separated, and the upper layer product was washed and dried to obtain refined biodiesel with a yield of 94.5%.

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PUM

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Abstract

The invention provides a method of utilizing calcium-magnesium zinc salts to promote biodiesel layering. The method which utilizes acid-containing oil catalysts to prepare biodiesel and then adds calcium-magnesium zinc salts to promote biodiesel layering belongs to the technical field of advanced energy. The method is characterized in that after adopting sodium hydroxide, potassium hydroxide and the like as catalysts to catalyze the reaction of the acid-containing oil and methanol so as to prepare the biodiesel, the method adds the calcium-magnesium zinc salts to promote layering in view of the non-layering of the biodiesel and glycerin; the oil with the acid value up to 15 can be catalyzed; and after the transesterification of the acid-containing oil, the calcium-magnesium zinc salts are added and stirred for 60 to 120 minutes at a temperature between 20 and 70 DEG C, so as to layer the biodiesel and the glycerin. The method has the advantages that the method can directly utilize the oil with the acid value up to 15, reduces production cost, is simple in post treatment process, improves the quality of biodiesel products, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of environmentally friendly new energy production, and relates to a novel biodiesel production process, in particular to a method for catalytically preparing biodiesel from acid-containing oil and then adding calcium, magnesium and zinc salts to promote stratification of biodiesel . Background technique [0002] With the increasing global energy shortage and environmental deterioration, the development of fuels that can replace petroleum and the protection of the natural environment on which human beings depend have become serious problems facing human beings. Known as "liquid solar energy", biodiesel produced from renewable oils is a high-quality substitute for ordinary diesel oil, an environmentally friendly green fuel, and has far-reaching economic and social benefits. [0003] At present, biodiesel is often produced from natural oils and fats in industry. Since natural oils and fats almost contain a ce...

Claims

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Application Information

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IPC IPC(8): C10G29/06C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 高登征王力刘丽华
Owner SHANDONG UNIV OF SCI & TECH
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