Method for catalytic synthesis of biodiesel by means of hydrotalcite-like immobilized potassium fluoride solid alkalies

A solid base catalyst, a technology for synthetic biology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc., can solve problems such as poor reusability of catalysts
CN107541234AActive Publication Date: 2018-01-05XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XIANGTAN UNIV
Publication Date
2018-01-05

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Abstract

The invention discloses a method for catalyzing grease and alcoholic substances to synthesize biodiesel by means of hydrotalcite-like immobilized potassium fluoride solid alkalies including KF / MgAlLa,KF / MgAl and KF / MgLa. The solid alkalies are of mesoporous hydrotalcite-like layered structures, the pore diameter is 12-21 nm, the pore volume is 0.04-0.10 cm<3> / g, the specific surface area is 14-30m<2> / g, the alkalinity pKa is 9.3-15.0, the catalytic activity is high, the solid alkalies are easily detached from a reaction system, the repeatability is good, the mass yield of the catalytic synthesis of the biodiesel is 99.1%, and the mass yield of the catalytic synthesis of the biodiesel after the catalyst is reused for 5 times is 80.9%.
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Description

technical field

[0001] The invention belongs to the field of biomass energy catalysis, and relates to a method for catalytically synthesizing biodiesel with a hydrotalcite-like solid-carrying potassium fluoride solid base. Background technique

[0002] Biodiesel is a fatty acid monoalkyl ester obtained by transesterification of animal and vegetable oils (fatty acid triglycerides) and alcohols (methanol or ethanol), the most typical being fatty acid methyl ester. Compared with traditional petrochemical energy, it has low content of sulfur and aromatics, high flash point, high cetane number, and good lubricity. It can be partially added to fossil diesel, and has attracted widespread attention as a renewable energy source. Commonly used catalysts include homogeneous catalysts and heterogeneous catalysts. Homogeneous acid-base has uniform catalytic strength and high catalytic efficiency, but there are problems such as complicated separation, equipment corrosion, acid-base treat...

Claims

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