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Method for preparing biodiesel by using biological enzyme

A biodiesel and bio-enzyme technology, applied in the field of oil chemistry, can solve the problems of short service life of bio-enzyme, unsatisfactory catalytic effect, low conversion efficiency, etc., achieve high conversion rate, promote catalytic efficiency, and reduce shielding effect

Inactive Publication Date: 2013-05-01
DONGGUAN HENENG MICROBIOLOGY ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of short service life of biological enzymes and low conversion efficiency during use, the present invention provides a method for preparing biodiesel by using biological enzymes, which solves the problems of unsatisfactory catalytic effect, short service life and low conversion rate when biological enzymes are used

Method used

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  • Method for preparing biodiesel by using biological enzyme
  • Method for preparing biodiesel by using biological enzyme
  • Method for preparing biodiesel by using biological enzyme

Examples

Experimental program
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Effect test

Embodiment 1

[0019] (1) First, mix 1000kg of palm oil with an acid value of 25mgKOH / g and 13.7kg of glycerin to form liquid A, and mix it evenly at 53°C, then mix 341.25kg of sec-butyl acetate with 8% of total mass of lipase Liquid B and mixed at 53°C. After the lipase is fully activated, liquid A and liquid B are mixed in an enzyme esterification reactor at a constant temperature of 53°C to fully react for 4 hours.

[0020] (2) The gas oil produced by the esterification reaction is precision filtered, the enzymes in the gas oil are separated and recovered, and the lipase is separated and then enters a centrifuge at a speed of 5500 rpm to separate impurities.

[0021] (3) The gas oil after centrifugal separation is subjected to atmospheric distillation to separate the excess sec-butyl acetate and the water produced by the reaction, and then after 0.002MPa vacuum distillation, the light phase and heavy phase are used to produce biodiesel and plants asphalt.

Embodiment 2

[0023] (1) First, mix 1000kg of soybean oil with an acid value of 50mgKOH / g and 27.3kg of glycerin to form liquid A, and mix it evenly at 55°C, and then mix 273.12kg of sec-butyl acetate with 10% of the total mass of lipase. B solution, and mix at 55°C, after the lipase is fully activated, then mix A solution and B solution in an enzyme esterification reactor at a constant temperature of 55°C to fully react for 8 hours.

[0024] (2) The gas oil produced by the esterification reaction is precision filtered, the enzymes in the gas oil are separated and recovered, and the lipase is separated and then enters a centrifuge at a speed of 5500 rpm to separate impurities.

[0025] (3) The gas oil after centrifugal separation is subjected to atmospheric distillation to separate the excess sec-butyl acetate and the water produced by the reaction, and then after 0.002MPa vacuum distillation, the light phase and heavy phase are used to produce biodiesel and plants asphalt.

Embodiment 3

[0027] (1) First, 1000kg of rapeseed oil with an acid value of 100mgKOH / g and 54.7kg of glycerin are mixed to form A liquid, and mixed uniformly at 45℃, and then 204.8kg of sec-butyl acetate is mixed with 11% of total mass of lipase Make liquid B and mix it at 45°C. After the lipase is fully activated, liquid A and B are mixed in an enzyme esterification reactor at a constant temperature of 45°C for 16 hours.

[0028] (2) The gas oil produced by the esterification reaction is precision filtered, the enzymes in the gas oil are separated and recovered, and the lipase is separated and then enters a centrifuge at a speed of 5500 rpm to separate impurities.

[0029] (3) The gas oil after centrifugal separation is subjected to atmospheric distillation to separate the excess sec-butyl acetate and the water produced by the reaction, and then after 0.002MPa vacuum distillation, the light phase and heavy phase are used to produce biodiesel and plants asphalt.

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Abstract

The invention provides a method for preparing biodiesel by using a biological enzyme. The method comprises the following steps of: (1) raw material mixing: uniformly mixing raw oil and glycerin into a solution A, mixing sec-butyl acetate and lipase into a solution B, and mixing the solution A and the solution B in an enzyme esterification reactor for further performing a complete esterification reaction and a complete ester exchange reaction; (2) product filtration: precisely filtering crude diesel generated by the esterification reaction, separating and recovering an enzyme from the crude diesel, centrifugally separating the crude diesel from which lipase is separated, and removing foreign residues; and (3) product purification: performing normal-pressure distillation on the centrifugally separated crude diesel, separating excessive sec-butyl acetate and water generated by reacting, and rectifying under a reduced pressure of 0.002MPa to obtain biodiesel and plant asphalt. The biodiesel prepared with the method has high kinematic viscosity, a high cetane number and a high grease transformation ratio during production.

Description

Technical field [0001] The invention belongs to the field of oleochemistry, and particularly relates to a method for preparing biodiesel by using biological enzymes. Background technique [0002] Biodiesel is a type of biomass energy. It is a monoalkyl ester of long-chain fatty acids obtained by biomass pyrolysis and other technologies. Biodiesel is a mixture of complex organic components with extremely high oxygen content. These mixtures are mainly organic substances with large molecular weights, including almost all kinds of oxygen-containing organic substances. Biodiesel basically does not contain sulfur and aromatics, and has a high cetane number, which is biodegradable, non-toxic and harmless to the environment. Its high oxygen-containing CN value is very conducive to the normal combustion of the compressor to reduce the emission of harmful substances in the exhaust gas, so it is called low pollution fuel. [0003] Biodiesel is mainly produced by chemical methods, that is, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/64
CPCY02E50/13Y02E50/10
Inventor 叶健文
Owner DONGGUAN HENENG MICROBIOLOGY ENERGY
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