Production method of biodiesel oil using high acid ralue animal and vegetable grease

A technology of animal and vegetable oils and biodiesel, which is applied in the field of oil chemistry, can solve the problems of clogging diesel engine filter screen and oil circuit, consideration of biodiesel cold filter point, and sediment formation, so as to realize circulation and recovery, and improve esterification Reaction conversion rate, high efficiency effect

Inactive Publication Date: 2004-12-22
INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] For the production of fatty acid methyl ester—biodiesel from animal and vegetable oils with high acid value, there are different defects in the prior art. In addition, as a raw material for vehicle diesel oil, the prior art does not consider the cold filter point of biodiesel. The filter point refers to the maximum temperature at which the vehicle fuel is cooled to the engine filter screen under specified conditions. Fatty acid methyl esters produced by existing known technical methods—biodiesel will generate deposits when used at low temperatures, which will block diesel oil. The filter screen and oil circuit of the engine, which is a common problem in the use of existing biodiesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the esterification reaction device with reflux and water separator, add 500 parts of frying oil in fast food industry recovered, its acid value is 20mgKOH / g oil, add 14 parts of glycerin, 150 parts of toluene, 5.20 parts of sulfuric acid at the same time, heat to Start reflux at 92°C, observe the phase interface of the water separator, gradually increase the reflux reaction temperature to 115°C, until the phase interface of the water separator does not rise, the esterification reaction is over, the reaction time is about 45 minutes, release the water in the water separator, and at the same time The reflux was closed and the toluene was distilled off. The acid value of the esterified mixture was 1.68mgKOH / g oil. The strong acid used as catalyst is then isolated.

[0026] The esterification mixture was decolorized with 36 parts of activated clay at 120° C. for 30 minutes, and the activated clay was filtered out by centrifugation.

[0027] Put the esterification mixtu...

Embodiment 2

[0032] In the esterification reaction device with reflux and water separator, add 500 parts of acidified oil recovered from the soapstock of rapeseed processing factory, its acid value is 115mgKOH / g oil, add 73 parts of glycerin, 150 parts of toluene, sulfuric acid at the same time 5.88 parts, heat to 92°C and start to reflux, observe the phase interface of the water separator, gradually increase the reflux reaction temperature to 115°C, until the phase interface of the water separator does not rise, the esterification reaction is over, the reaction time is about 118 minutes, and the water separator is released In the water, while closing the reflux, distill off the toluene. The acid value of the esterification mixture was 1.82 mgKOH / g oil. The strong acid used as catalyst is then isolated.

[0033] The esterification mixture was decolorized with 40 g of activated clay at 120° C. for 30 minutes, and the activated clay was filtered out by centrifugation.

[0034]Put the ester...

Embodiment 3

[0039] In the esterification reaction device with reflux and water separator, add 500 parts of acidified oil recovered from the soapstock of rapeseed processing factory, its acid value is 115mgKOH / g oil, and add 77 parts of glycerin and 1:4 ethanol at the same time 150 parts of benzene azeotropic distillation solvent, 20 parts of macroporous polystyrene strongly acidic cation exchange resin activated and washed with methanol, heated to 75°C and started to reflux, observe the phase interface of the water separator, and gradually increase the reflux reaction temperature to 100°C , until the phase interface of the water separator does not rise, the esterification reaction is completed, and the reaction time is about 136 minutes. The water in the water separator is released, and the reflux is closed simultaneously, and the solvent is evaporated. The acid value of the esterification mixture was 1.97mgKOH / g oil. The resin used as catalyst was then separated and filtered off.

[004...

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Abstract

A process for preparing the biological diesel oil from the animal fat or vegetative oil with high acid number includes esterifying by glycerine under existance of strong acid catalyst, distilling in azeotropic solvent for removing water, mixing with methanol, transesterifying reacting to remove glycerine, water washing, and low-temp treating for removing high-smelting-point substances to obtain methyl ester of fatty acid, which is just the biological diesel oil.

Description

technical field [0001] The invention relates to a method for producing fatty acid methyl ester—biodiesel from animal and vegetable oils with high acid value, belonging to the field of oil chemistry. Background technique [0002] The acid value is one of the important indicators reflecting the quality of animal and vegetable oils. If the acid value exceeds a certain range, it indicates that the oil is not suitable for consumption. It is called high acid value oil, such as waste edible oil (mainly: waste oil after frying food, often called Old oil; grease recovered from catering sewers, commonly known as gutter oil or swill oil), long-term storage of oil beyond the shelf life, acidified and deteriorated oil, and oil recovered from various oil feet of edible oil factories all have this feature. There have been many reports on the utilization technology of high acid value animal and vegetable oils. [0003] In the disclosed technology, as described in CN1382762A, it carries out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 黄庆德黄凤洪夏伏建郭萍梅王江薇钮琰星李文林刘昌盛程小英
Owner INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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