Method for preparing biological diesel oil using nano solid acid or alkali catalyst

A biodiesel, solid acid technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve the problems of poor repeated use performance, catalysts cannot be recycled and reused, environmental pollution, etc., and achieves improved repeatability. Effect
CN1858160AInactive Publication Date: 2006-11-08INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
Publication Date
2006-11-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to process of preparing low carbon alkyl ester and biological diesel oil by means of nanometer solid acid or alkali catalyst. Under the action of catalyst in the amount of 1-20 wt% of animal and vegetable oil, low carbon alcohol and animal and vegetable oil in the molar ratio of 3.5-40 to 1 are reacted at the pressure from normal to 25 MPa and temperature of 40-100 deg.c to produce coarse methyl ester and glycerin, which are centrifugally separated and distilled to obtain low carbon alcohol, or neutral biological diesel oil and glycerin, separately. The present invention has biological diesel oil converting rate up to 96% and yield up to 99%, and the product meets the ASTM D 6751-02 standard. The nanometer solid acid or alkali catalyst may be used repeatedly for 3-100 times in producing biological diesel oil, and the product needs no neutralization and washing.
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Description

technical field

[0001] The invention relates to a method for preparing fatty acid low-carbon alkyl ester—biodiesel by catalysis of nano-scale solid acid or alkali, which belongs to the application field of oil chemistry and chemical industry. Background technique

[0002] Biodiesel is a green and renewable energy that can be used as a high-quality substitute for petrochemical diesel. It uses animal oil, vegetable oil, waste cooking oil, etc. as raw materials, and carries out transesterification reaction with low-carbon alcohol (1-4 carbon atoms) under certain conditions, and the obtained product is biodiesel (low-carbon alkyl ester of fatty acid) , the by-product is glycerin. Traditional homogeneous catalysts usually use liquid acids and bases, mainly concentrated sulfuric acid, NaOH, KOH, etc. The significant defects of these liquid catalysts are that the products after the reaction need to be neutralized and washed, causing environmental pollution, and the by-product glyc...

Claims

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