Process for supercritical preparation of biologic diesel oil

A technology of biodiesel and preparation technology, applied in the field of oil chemistry, can solve the problems of environmental pollution and no way to use the deteriorated oil, and achieve the effects of small tail gas pollution, reduction of greenhouse effect, and easy implementation

Inactive Publication Date: 2005-03-16
WUHAN CHEM COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current catering industry, food industry and other related industries produce a large amount of waste animal and vegetable oil every day. These waste oils generally contain a lot of impurities, some of which are recycled for making soap, but a considerable part is directly discharged without recycling and treatment. causing environmental pollution
At the same time, every year in the grain sector, a large amount of stored oil has deteriorated due to long-term storage, and this part of the deteriorated oil has not yet found a very good way to use it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0026] Mix 40g of edible soybean oil and 100g of methanol, put it into the high-temperature and high-pressure reactor, when heated to 350°C, the pressure gauge shows a pressure of 10.4MPa, and then keep at this temperature for 20 minutes; the high-temperature and high-pressure reactor is cooled to room temperature by condensed water ; Distill the methanol in the reaction at 60-70°C, and the methanol can be recycled; carry out phase separation treatment at 30°C for a total of 30 minutes to generate 36.0g of fatty acid methyl ester—biodiesel, with a yield of 90%. The reaction in this example is a reaction under supercritical conditions.

specific Embodiment approach 2

[0027] Mix 60g of edible rapeseed oil and 140g of methanol, put it into a high temperature and high pressure reactor, add 2g of catalyst, when heated to 320°C, the pressure gauge shows a pressure of 24MPa, and then keep at this temperature for 20 minutes; the high temperature and high pressure reactor is condensed Cool the water to room temperature; distill the methanol in the reaction at 60-70°C, methanol can be recycled; carry out the phase separation treatment at 20°C for 20 minutes in total, and generate 57.2g of fatty acid methyl ester—biodiesel, The yield was 95.3%. The reaction in this example is a reaction under supercritical conditions.

specific Embodiment approach 3

[0028] Mix 50g edible rapeseed oil and 100g methanol, put it into the high-temperature and high-pressure reactor, when heated to 250°C, the pressure gauge shows a pressure of 9.5MPa, and then keep at this temperature for 20 minutes; the high-temperature and high-pressure reactor is cooled to room temperature by condensed water ; Distill the methanol in the reaction at 60-70°C, and the methanol can be recycled; carry out the phase-separation treatment under the condition of 60°C, and continue for 40 minutes to generate 46g of fatty acid methyl ester—biodiesel, with a yield of 92 %. The reaction in this example is a reaction under supercritical conditions.

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PUM

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Abstract

The invention discloses a process for supercritical preparation of biologic diesel oil by using animal or plant oil, waste edible oil, oiling crop seeds as raw material through the steps of filtering, dewatering, esterification, ester interchange, filtering, steaming methanol and phase-splitting.

Description

technical field [0001] The invention relates to a process for preparing fatty acid methyl ester-biodiesel from animal and vegetable oil, which belongs to the field of oil chemistry. Background technique [0002] At present, the technical focus of fuel oil is on the one hand, alternative, that is, energy from non-petrochemical sources; on the other hand, it is the so-called "renewable raw materials", especially animal and vegetable oils. The main components of animal and vegetable oils are fatty acid glycerides, which are biodegradable and environmentally compatible energy sources. However, due to its physical and chemical properties (large molecular weight, poor low-temperature fluidity, and poor high-temperature thermal stability), its use in automobiles is limited. Through chemical methods, it is modified to reduce the cold filter point, improve the high temperature stability, and become the so-called biodiesel, so that it can be used as a ...

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 王存文肖建华吴元欣王为国陈苏芳
Owner WUHAN CHEM COLLEGE
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