Method for producing biodiesel by using solid acid to catalyze waste animal and vegetable oils and fats

A technology for catalysis of waste animals and plants and solid acid, which is used in the field of solid acid catalysis of waste animal and vegetable oils and fats to produce biodiesel, can solve problems such as human health, environment and groundwater threats, and achieve good physical and chemical performance indicators, low equipment corrosion, and elimination of Effects of Environmental Pollution

Inactive Publication Date: 2011-09-14
杨大伟
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Problems solved by technology

However, most microemulsions need to add or use traditional solvents with high toxicity and strong polarity during preparation, which poses threats to human health, the environment and groundwater; therefore, it is imperative to find new green solvents

Method used

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Embodiment Construction

[0013] A method for efficiently producing biodiesel from waste animal and vegetable oils catalyzed by solid acid, the specific steps are as follows: (1) Add a certain amount of animal and vegetable oils or their leftovers into a reaction kettle, heat to 80-90°C, vacuum dehydrate, remove Miscellaneous, so that the impurity content is <0.3%, and the moisture content is <0.5%.

[0014] (2) Add 1% sodium bisulfate or zirconium sulfate and 7% methanol or ethanol to the reaction kettle, keep a pressure of 0.2 MPa and a temperature of 110 to 125°C in the kettle, and stir for 2 hours to make the reaction product The acid value of the acid drops to below 30mgKOH / g, recover methanol or ethanol, and drain the solid acid residue at the bottom; then add 0.5% solid acid (sodium bisulfate or zirconium sulfate) and 7% methanol or ethanol by weight of raw materials, and keep Under the conditions of 0.2 MPa pressure and 110-125°C temperature, stir and react for 2 hours to reduce the acid value ...

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Abstract

The invention provides a method for producing biodiesel by using solid acid to catalyze waste animal and vegetable oils and fasts, leftovers of the animal and vegetable oils and fats are taken as raw materials, a sodium bisulfate or zirconium sulfate catalyst and methanol or ethanol are added, and stirring reaction is performed under the conditions that the pressure is 0.2MPa and the temperature is 110-125 DEG C so as to reduce the acid value of a reaction product to below 2mg KOH/g; the residual methanol or the ethanol is recovered, 0.2% of sodium methoxide is further added, and the stirringreaction is performed for 30 minutes at the temperature of 60-65 DEG C; and performing decompression distillation on the reaction product so as to get the biodiesel. The sources of the raw materials are abundant, and the price is low. Compared with the traditional esterification method or the ester exchange method for producing the biodiesel, the process uses the solid acid to replace concentrated sulfuric acid for being used as the catalyst; furthermore, the using quantity of organic base is small, the environmental pollution is small, the equipment corrosivity is small, and the sewage treatment cost is reduced. By adopting the method, not only resources are saved, but also the environmental pollution problem caused by the leftovers generated during refining of vegetable oil at present is eliminated, and waste is further changed to a valuable matter.

Description

technical field [0001] The invention relates to a production method of biodiesel, belonging to the technical field. Background technique [0002] As a safe and clean biofuel, biodiesel is a renewable resource and a typical green energy source. It has the advantages of low toxicity, fast biodegradation, good environmental compatibility, high flash point, and safe storage and transportation. are getting more and more attention. Generally speaking, biodiesel is a mixed fatty acid methyl ester prepared by transesterification of animal and vegetable oils and methanol, and its main components are methyl stearate, methyl palmitate, methyl oleate and linoleum Acid methyl ester etc. [0003] In recent years, with the increasing awareness of environmental protection and the rising price of petroleum products, emulsifiable concentrate preparations have attracted widespread attention due to their high organic solvent content, environmental pressure and cost, and are gradually being us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11B3/00C10L1/02
CPCY02E50/13Y02E50/10
Inventor 杨大伟杨雄朱毅
Owner 杨大伟
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