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Pretreatment method for preparation of biodiesel from swill-cooked dirty oil

A biodiesel and waste oil technology, which is applied in the field of resource recycling science and engineering, can solve the problems of high waste oil, unsuitable biodiesel, limited raw material processing range, etc., and achieves the effect of saving cost, improving yield and quality

Active Publication Date: 2018-11-30
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, waste oil has high acid value, colloid, moisture and other impurities, so it is not suitable for direct transesterification to produce biodiesel
In particular, most people use a single tank reaction or a single fixed bed to prepare biodiesel, which limits their processing range of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the pretreatment of waste oil

[0021] 1.1 Raw materials: waste oil

[0022] 1.2 Reagents and instruments

[0023] Reagents: petroleum ether (60-90°C), diatomaceous earth, anhydrous magnesium sulfate

[0024] Instruments: Erlenmeyer flask, electric stirrer, suction filter flask, Buchner funnel, separatory funnel, round bottom flask, circulating water multi-purpose vacuum pump, vacuum rotary evaporator

[0025] 1.3 Preprocessing method

[0026] Take 200g of waste oil and place it in a conical flask, add 200mL of petroleum ether (60-90°C), start an electric stirrer at room temperature to fully dissolve it, and then filter through diatomaceous earth under reduced pressure to remove solid insoluble matter. Add 50 mL of water to the waste oil after removing the insoluble matter, heat to reflux for 30 minutes, and remove the water layer by centrifugation or liquid separation. After removing the water layer, the waste oil was dried with anhydrous magnesium su...

Embodiment 2

[0027] Embodiment 2: the pre-esterification of waste oil

[0028] 2.1 Reagents and instruments

[0029] Reagents: Methanol (analytically pure), concentrated sulfuric acid (analytical pure), distilled water

[0030] Instruments: thermometer, electric stirrer, water separator, spherical condenser, three-necked flask, electric heating mantle, circulating water type multi-purpose vacuum pump, vacuum rotary evaporator

[0031] 2.2 Pre-esterification method

[0032] Add 100 g of the crude oil obtained in Example 1, 16 mL of methanol and 2 g of concentrated sulfuric acid into a three-necked flask equipped with a thermometer, an electric stirrer, a water separator, and a spherical condenser, and use a constant temperature electric heating mantle to control the reaction temperature to 75 ° C. After reflux for 4 hours, the methanol and the water produced by the reaction were evaporated in vacuo. Then pour the grease into the separatory funnel and wash with water until the washing wat...

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PUM

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Abstract

The invention discloses a pretreatment method for preparation of biodiesel from swill-cooked dirty oil. Swill-cooked dirty oil pretreated by the method provided by the invention can serve as the raw oil for preparation of biodiesel, and the raw oil subjected to pre-esterification can be directly used for preparation of biodiesel, thus improving the yield and quality of biodiesel.

Description

technical field [0001] The invention relates to a pretreatment method for preparing biodiesel from waste oil, and belongs to the field of resource recycling science and engineering technology. Background technique [0002] Waste oil refers to all kinds of waste oil and oily waste, including swill oil (in the ditch near hotels and restaurants, the greasy floating matter above the sewage, which is collected and processed briefly. The oil is dark brown, opaque, and has a strong odor. sour and foul odor). Biodiesel is a high-grade fatty acid methyl ester or high-grade fatty acid ethyl ester fuel made from renewable raw materials such as oil crops, wild oil plants and engineered microalgae, as well as renewable raw materials such as animal fats and catering waste oils through transesterification. Biodiesel currently used in countries around the world mainly refers to fatty acid methyl esters obtained by transesterifying animal and vegetable oils with methanol. Using gutter oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/10C11B3/12C10L1/02
CPCC10L1/02C11B3/001C11B3/008C11B3/10C11B3/12Y02E50/10
Inventor 游晓璐崔瑶古镇威邓汉文朱峰
Owner FOSHAN UNIVERSITY