Solid base catalyst and method for preparing biodiesel by use of solid base catalyst

Abstract

The invention relates to a preparation method of a solid base catalyst. The preparation method comprises the following steps: weighing appropriate amount of CH3COONa solid powder and dissolving into distilled water to obtain 200g / L of a CH3COONa solution; weighing certain amount of Al2O3, and performing supersaturated impregnation on Al2O3 for 24h with the prepared CH3COONa solution; and drying the Al2O3 after supersaturated impregnation at 105 DEG C for 4h, calcining for 3h at 500 DEG C and naturally cooling to obtain Na2O / Al2O3 supported solid base catalyst. The invention also discloses a method for preparing the biodiesel with adoption of the Na2O / Al2O3 supported solid base catalyst. The supported catalyst Na2O / Al2O3 prepared by an impregnation method has good catalytic activity in a biodiesel catalytic synthesis process. The optimal process conditions for preparing the biodiesel by use of the supported catalyst are as follows: the reaction temperature is 65 DEG C, the molar ratio of methanol to oil is 9:1, the reaction time is 4h, the using amount of the catalyst is 2%, and the production rate of the biodiesel under the conditions is 85.4%.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a solid base catalyst for producing biodiesel. Background technique [0002] In recent years, a series of problems such as the sharp rise in crude oil prices, restrictions on the import and export of crude oil, and global warming caused by the use of mineral oil have forced people to turn their attention to finding new renewable fuel resources. Biodiesel has attracted more and more attention due to its advantages such as renewable, degradable, non-toxic, high flash point, high cetane number, and environmental friendliness. The main component of biodiesel is fatty acid methyl ester, which can be made from oil-bearing crops such as soybean and rapeseed, oil-bearing forest fruits such as oil palm and pistachio, engineering microalgae and other oil-bearing aquatic plants, animal fats, and waste cooking oil, etc. , has properties similar to petroleum diesel,...

AI Technical Summary

Problems solved by technology

Since the reactant is a uniform liquid, the reaction time is greatly shortened and the reaction temperature is lowered; however, it is difficult to separate the product from the solvent after the reaction