A green production method for biodiesel

CN117757530BActive Publication Date: 2026-05-26FUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUZHOU UNIV
Filing Date
2023-12-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing biodiesel production methods suffer from problems such as difficulty in catalyst separation, high energy consumption, large amounts of wastewater discharge, and long reaction times, which affect industrial applications.

Method used

Biodiesel is prepared by using a superhydrophobic polymer solid acid catalyst and a macroporous strong base ion exchange resin, combined with esterification and transesterification reactions, through pretreatment, esterification, liquid-liquid phase separation, drying, transesterification and distillation steps, avoiding catalyst loss and saponification reaction, and simplifying the process flow.

Benefits of technology

It has achieved efficient and green production of biodiesel, with high product quality, high yield, and environmental friendliness, reducing energy consumption and wastewater discharge, and improving production efficiency.

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Abstract

This invention discloses a green production method for biodiesel. First, pretreated feedstock oil and methanol are preheated and then fed into a reactor loaded with a superhydrophobic polymer solid acid catalyst for esterification. After oil-water separation, the oil phase is then fed into a reactor loaded with a macroporous strong-base ion exchange resin for transesterification. The biodiesel product is collected by vacuum distillation. The biodiesel production method provided by this invention has strong feedstock adaptability, no wastewater discharge, and excessive energy consumption. Methanol can be recycled, resulting in high feedstock utilization and product quality. Furthermore, the catalyst is simple to prepare, the reaction rate is fast, and the active phase is not easily lost.
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