Solid base catalyst for synthesizing biodiesel and preparation method and application thereof

Abstract

The invention discloses preparation of anion-modified solid base and application of the same in biodiesel preparation reaction by a catalytic ester interchange method. The catalyst is directly prepared from metal nitrate, metal oxide and ammonium halide under the alkaline condition by a one-step method. The preparation method is simple to operate, and the catalyst has low cost. In the biodiesel preparation reaction by the ester interchange method, the catalyst has high catalytic activity, good reusability and mild reaction conditions, and does not pollute the environment.

Description

technical field

[0001] The invention relates to a solid base catalyst for synthesizing biodiesel, a preparation method and application. Background technique

[0002] Biodiesel is an environmentally friendly renewable fuel that can be used instead of regular diesel. It has the advantages of renewable, degradable, non-toxic, high flash point, high cetane number, and environmentally friendly. Its popularization and use will provide an ideal substitute for increasingly depleted fossil raw materials, and can effectively reduce the emission of greenhouse gases.

[0003] At present, most biodiesel is prepared by homogeneous transesterification reaction. Although the catalytic efficiency is very high, it is difficult to separate the catalyst from the product, and a large amount of waste acid and lye pollute the environment. The use of a solid catalyst instead of a homogeneous catalyst makes it easy to separate the product from the catalyst, avoids the discharge of a large amount o...