Production process for producing biological diesel oil from vegetable oil

Abstract

The present invention provides process of producing biodiesel oil (fatty methyl ester) with vegetable oil fatty acid. The production process includes the following steps: 1. dewatering vegetable oil in a reaction tower at 80-120 deg.c and 0.3-0.5 KPa to obtain material oil with water content not more than 1.4 %; 2. heating the material oil at 320-340 deg.c in a heating furnace and distilling in a distilling tower at the temperature not lower than 310 deg.c for 1-2 hr; 3. fractioning the distilled oil and vapor in a rectifying tower and filtering the obtain biodiesel oil in a filtering tower; and 4. cooling the filtered biodiesel oil with cooling water at 30-50 deg.c to obtain biodiesel oil product. The production process has high conversion rate, less catalyst, less additives and other features.

Description

technical field [0001] The invention relates to a method for producing fatty acid methyl ester (biodiesel) from vegetable oil fatty acid, which belongs to the field of oil chemistry. Background technique [0002] In the disclosed technology, described in CN1382762A, it is in the presence of an acidic catalyst, the waste animal and vegetable oils with various acid values ​​are subjected to alcoholysis and esterification reactions, and then after a series of treatments, add soda ash A method of producing fatty acid methyl esters by distillation. Described in CN1724613, it adopts a transesterification reaction by raw materials, first recovers methanol after the reaction is finished, and then refines biodiesel by steam distillation. Fatty acid methyl esters produced by existing known technical methods need to add a large amount of catalysts, additives, etc., which are not easy to be extracted from the final finished product, which affects the purity of fatty acid methyl esters....

AI Technical Summary

Problems solved by technology

Fatty acid methyl esters produced by existing known technical methods need to add a large amount of catalysts, additives, etc., which are not easy to be extracted from the final product, which affects the purity of fatty acid methyl esters