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Method for producing biodiesel by using waste oil and fat

A biodiesel and waste oil technology, applied in the fields of biofuel, fat production, fat oil/fat refining, etc., can solve the problems of serious sewage production, unstable quality, large product proportion, etc., to protect the environment, improve purity, and high transparency Effect

Inactive Publication Date: 2010-09-15
江春德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, many domestic enterprises and colleges and universities have developed biodiesel one after another, but the common problems are: the method is complicated; the use of acid catalysis system produces serious sewage and pollutes the environment; the product has a large proportion, insufficient energy and unstable quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 A kind of method utilizing waste oil to produce biodiesel

[0020] Proceed as follows:

[0021] 1) Place the acquired waste oil in a vertical oil-water separator, centrifuge at a speed of 17000 rpm, and take the oil phase;

[0022] 2) Put the oil phase into the lipidation reaction tank, add a mixture of potassium hydroxide and sodium hydroxide and methanol in a weight ratio of 1:1 in sequence, heat up to 60° C. under stirring, and react for 1 to 1.5 hours to obtain a crude product;

[0023] Wherein, the oil phase, the mixture of potassium hydroxide and sodium hydroxide and the consumption of methyl alcohol are 100:0.20:15 by weight;

[0024] 3) Throwing the crude product into the settling tank, standing still for 5-6 hours, carrying out precipitation, releasing impurities such as crude glycerin, methanol and reaction by-products from the bottom of the settling tank, and taking the upper liquid;

[0025] 4) Put the obtained upper liquid into a vertical oil...

Embodiment 2

[0027] Embodiment 2 A kind of method utilizing the waste oil of restaurant to produce biodiesel

[0028] Proceed as follows:

[0029] 1) Place the waste oil from the acquired restaurant in a vertical oil-water separator, and centrifuge at a speed of 17,000 rpm to take the oil phase;

[0030] 2) Put the oil phase into the lipidation reaction tank, add a mixture of potassium hydroxide and sodium hydroxide and methanol in a weight ratio of 1:1 in sequence, heat up to 60° C. under stirring, and react for 1 to 1.5 hours to obtain a crude product;

[0031] Wherein, the oil phase, the mixture of potassium hydroxide and sodium hydroxide and the consumption of methyl alcohol are 100:0.15:10 by weight;

[0032] 3) Throwing the crude product into the settling tank, standing still for 5-6 hours, carrying out precipitation, releasing impurities such as crude glycerin, methanol and reaction by-products from the bottom of the settling tank, and taking the upper liquid;

[0033] 4) Put the ...

Embodiment 3

[0035] Embodiment 3 A kind of method utilizing waste animal oil (or vegetable oil) to produce biodiesel

[0036] Proceed as follows:

[0037] 1) Place the acquired waste animal oil (or vegetable oil) in a vertical oil-water separator, centrifuge at a speed of 17000 rpm, and take the oil phase;

[0038] 2) Put the oil phase into the lipidation reaction tank, add a mixture of potassium hydroxide and sodium hydroxide and methanol in a weight ratio of 1:1 in sequence, heat up to 60° C. under stirring, and react for 1 to 1.5 hours to obtain a crude product;

[0039] Wherein, the oil phase, the mixture of potassium hydroxide and sodium hydroxide and the consumption of methyl alcohol are 100:0.25:20 by weight;

[0040] 3) Throwing the crude product into the settling tank, standing still for 5-6 hours, carrying out precipitation, releasing impurities such as crude glycerin, methanol and reaction by-products from the bottom of the settling tank, and taking the upper liquid;

[0041] ...

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PUM

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Abstract

The invention relates to a method for producing biodiesel by using waste oil and fat. An adopted technical scheme is that the method comprises the following steps of: putting purchased waste oil and fat into a vertical oil-water separator, performing centrifugal separation on the oil and the fat at a rotating speed of 17,000 revolutions per minute, and taking an oil phase; throwing the oil phase into an esterification reaction tank, adding a mixture of potassium hydroxide and sodium hydroxide and methanol in a weight ratio of 1:1 into the esterification reaction tank in turn, raising the temperature to 60 DEG C under stirring, and performing a reaction for 1 to 1.5 hours to obtain a crude product, wherein the weight ratio of the used amount of the oil phase to the mixture of the potassium hydroxide and the sodium hydroxide to the methanol is 100:0.15-0.25:10-20; throwing the crude product into a sedimentation tank, performing standing for 5 to 6 hours for sedimentation, discharging impurities from the bottom of the sedimentation tank, and taking a supernatant liquid; and throwing the supernatant liquid into the oil-water separator, and performing centrifugal separation on the supernatant liquid at the rotating speed of 17,000 revolutions per minute to obtain a finished product. The method has the advantages of stable quality, high performance and environmental protection.

Description

technical field [0001] The invention belongs to the field of chemical synthesis methods, in particular to a method for producing biodiesel from waste oil. Background technique [0002] Diesel is a compression ignition engine (ie diesel engine) fuel and one of the most consumed petroleum products. Compared with gasoline engines, diesel engines have higher thermal efficiency, higher power, lower unit fuel consumption, and are more economical, so they are widely used and their demand is increasing year by year. However, the natural resources of diesel are limited. With the continuous exploitation, not only cannot meet the growing demand , but also damage the environment. Therefore, there is an urgent need to find a renewable diesel fuel that can replace petrochemical diesel. For this reason, many domestic enterprises and colleges and universities have developed biodiesel successively, but the common problems are: the method is complicated; the use of acid catalysis system pro...

Claims

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Application Information

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IPC IPC(8): C11C3/10C11B3/16C10L1/02
CPCY02E50/13Y02E50/10
Inventor 关世怀
Owner 江春德
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