Method of producing biological fuel oil from poor oil

Abstract

The invention discloses a preparing method of biological fuel oil with poor oil in chemical industry technical domain, which comprises the following steps: removing water and impurity of raw oil; separating oil and extricate aliphatic acid through vacuum distillation; reacting the oil with carbinol through base catalysis method; getting aliphatic acid methyl ester; reacting extricate aliphatic acid with carbinol through acid catalyst; getting aliphatic acid methyl ester; merging the rough aliphatic acid methyl ester; washing; distilling; refining; getting the product. This invention either increases the adaptability of craft, or improves the availability ratio of raw material.

Description

Technical field:

[0001] The invention belongs to the technical field of chemical industry, in particular to a method for extracting biofuel oil from inferior oil. Background technique:

[0002] At present, to produce biofuel oil with low-quality oil as raw material, it is generally necessary to neutralize and deacidify the low-quality oil by adding alkali to remove free fatty acids in the low-quality oil. Because the existence of free fatty acid will produce saponification, lead to the increase of catalyst dosage, the reduction of catalytic efficiency, and the conversion rate of reaction will be reduced. Therefore, removal is necessary. However, the content of free fatty acids in inferior oil not only accounts for a relatively large proportion, but also free fatty acids themselves are good raw materials for generating fatty acid methyl esters, and deacidification treatment not only cannot make full use of free fatty acids, resulting in waste of raw materials, but also incre...