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Method of making biodiesel oil by subcritical methanol phase solid acid alkali catalytic oil fat ester exchange

A subcritical methanol, acid-base catalysis technology, applied in the direction of biological raw materials, biofuels, petroleum industry, etc., can solve the problems of industrialization difficulties and high equipment requirements, and achieve the effect of reducing reaction temperature, shortening reaction time and reducing equipment investment.

Inactive Publication Date: 2007-10-24
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

There is no catalyst for the transesterification reaction of supercritical methanol phase methanol and oil, but the reaction is carried out under high temperature and high pressure conditions, which requires high equipment and is difficult to industrialize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1), get 90 milliliters of soybean oil and add into the autoclave, add 9 grams of K 2 CO 3 / Al 2 o 3 Catalyst, control the reaction temperature at 140°C, inject methanol through a high-pressure plunger pump until the system pressure is 2MPa, add about 160 ml of methanol at this time, the molar ratio is about 1:42, and the reaction time is 20 minutes;

[0023] (2), after the reaction is finished, the product obtained in (1) is filtered to separate the catalyst, the reaction product is left to stand and layered, the upper layer is a mixture of methanol and fatty acid methyl ester, distilled methanol to obtain fatty acid methyl ester, that is, biodiesel, and the lower layer is methanol and glycerin mixture, methanol was distilled to obtain glycerin.

Embodiment 2

[0025] (1), get 150 milliliters of rapeseed oil and add to the autoclave, add 10 grams of SO 4- / ZrO 2 -TiO 2 Catalyst, control the reaction temperature at 150°C, inject methanol through a high-pressure plunger pump until the system pressure is 3MPa, add about 100 ml of methanol at this time, the molar ratio is about 1:16, and the reaction time is 30 minutes;

[0026] (2), after the reaction is finished, the product obtained in (1) is centrifuged to separate the catalyst, and the reaction product is left to stand for stratification. The upper layer is a mixture of methanol and fatty acid methyl ester, and methanol is distilled to obtain fatty acid methyl ester, which is biodiesel. The lower layer is methanol and glycerin. mixture, methanol was distilled to obtain glycerin.

Embodiment 3

[0028] (1), take 200 ml of peanut oil into the autoclave, add 5 grams of KF / Al 2 o 3 Catalyst, control the reaction temperature at 180°C, inject methanol through a high-pressure plunger pump until the system pressure is 6Mpa, add about 50 ml of methanol at this time, the molar ratio is about 1:6, and the reaction time is 40 minutes;

[0029] (2), with embodiment 1.

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Abstract

A process for preparing biologic diesel oil from plant oil and methanol includes such steps as proportionally adding plant oil and methanol into high-pressure reactor, adding solid catalyst, reaction, separating out catalyst, laying aside for layering, distilling the mixture of methanol and methyl ester of fatty acid on upper layer to obtain methyl ester of fatty acid (biologic diesel oil ) and distilling the mixture of methanol and glycerine on lower layer to obtain glycerine.

Description

technical field [0001] The invention relates to the field of renewable energy, belongs to the green chemical process, and is a method for producing biodiesel by subcritical methanol phase solid acid-base catalyzed transesterification of grease and methanol. Background technique [0002] Biodiesel refers to substances derived from biological products that can be used as fuel for diesel engines, including cracking products of animal and vegetable oils or fatty acid esters obtained by transesterification of animal and vegetable oils with short-chain alcohols. Biodiesel has the characteristics of renewable, complete combustion, low exhaust pollution, easy biodegradation, and harmless to human body. The research and application of biodiesel is of great significance for coping with the oil crisis, improving fuel safety, and transitioning fuel varieties after oil resources are exhausted. At present, the application of biodiesel mainly has the following four methods: direct mixed u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 侯相林乔欣刚齐永琴杜俊民
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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