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Biologically catalystic process of converting fat into ester to produce biological diesel oil

A biocatalytic oil and biodiesel technology, which is applied in the preparation of biological raw materials, liquid hydrocarbon mixtures, and the petroleum industry, can solve the problems of biocatalyst toxicity, low conversion rate of methanol, and high viscosity of the reaction system, so as to avoid pollution, Simplify raw material handling and product recovery process, reduce the effect of reaction temperature

Inactive Publication Date: 2003-11-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the reaction speed of the chemical method is fast, there are some shortcomings that cannot be eliminated by itself: such as complex process, high alcohol excess, corresponding alcohol recovery device must be installed in the follow-up process, high energy consumption, waste lye discharge during the production process, etc.
The current biological method has the following limitations: first, methanol has a toxic effect on the biocatalyst; second, the viscosity of the reaction system is too high; third, the conversion rate of methanol is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mix the pretreated industrial waste oil with methanol (the molar ratio of alcohol to oil is 0.8:1), and pump it into the first-stage fixed-bed enzyme reactor (diameter-to-height ratio 10×300mm, and fill 8g from Thermomyces lipase) for transesterification reaction, the flow rate is 8mL / h, the effluent is allowed to stand for stratification, and the crude glycerol in the lower layer is separated, and the upper layer is mixed with methanol (alcohol to oil molar ratio 0.8:1) and then enters The second-stage fixed-bed enzyme reactor (diameter-to-height ratio 10×300mm, filled with 8g of lipase derived from Thermomyces spp.) was used for transesterification reaction at a flow rate of 8mL / h, and the effluent was left to separate and separate the lower layer Crude glycerin, supernatant and methanol (alcohol and oil molar ratio 0.8: 1) are mixed and then enter the third stage fixed bed enzyme reactor (diameter to height ratio 10 × 300mm, fill 10g lipase derived from Thermomyces )...

Embodiment 2

[0016] Mix the pretreated waste oil from the catering industry with methanol (the molar ratio of alcohol to oil is 1:1), and pump it into the first-stage fixed-bed enzyme reactor (diameter-to-height ratio 10×300mm, filled with 5g source) through a constant flow pump. The lipase of Candida antarctica) was transesterified at a flow rate of 6mL / h, and the effluent was allowed to stand for stratification, and the crude glycerin in the lower layer was separated, and the upper layer was mixed with methanol (alcohol to oil molar ratio 1:1) The second-stage fixed-bed enzyme reactor (diameter-to-height ratio 10×300mm, filled with 5g of lipase derived from Candida antarctica) was used for transesterification reaction at a flow rate of 6mL / h. Glycerol, supernatant and methanol (alcohol to oil molar ratio 1:1) were mixed and then entered into the third-stage fixed-bed enzyme reactor (diameter-height ratio 10×300mm, filled with 7g lipase derived from Candida antarctica) for Transesterifica...

Embodiment 3

[0018] Mix the pretreated tung oil with methanol (the molar ratio of alcohol to oil is 1:1), and pump it into the first-stage fixed-bed enzyme reactor (diameter-to-height ratio 10×300mm, and fill 10g rice The lipase of Mucor niger) carries out the transesterification reaction, flow rate 8mL / h, and effluent is statically layered, separates the crude glycerol of lower layer, and the upper layer is mixed with methanol (alcohol to oil molar ratio 0.8:1) and enters the second A three-stage fixed bed enzyme reactor (diameter-to-height ratio 10×300mm, filled with 8g of lipase derived from Mucor miehei) was used for transesterification at a flow rate of 8mL / h. The upper layer was mixed with methanol (alcohol to oil molar ratio 0.8:1) and then entered into the third-stage fixed-bed enzyme reactor (diameter-height ratio 10×300mm, filled with 10g lipase derived from Mucor miehei) for transesterification Reaction, flow rate 8mL / h, effluent static stratification, separate the crude glycero...

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PUM

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Abstract

In the biologically catalytic process, 3 or 4 stages of fixed bed enzyme reactors are used for continuous ester converting reaction. Raw material oil and grease and methanol in the methanol / oil molar ratio of 0.5-1 are added into the first fixed bed enzyme reactor, and the product effluent is separated to obtain coarse glycerine and other product to be passed through the subsequent reactors successively. The said process is repeated and ultimate product is separated to obtain biological diesel oil. Cheap oil and grease or even waste can be used to reduce the production cost of biological diesel oil. The present invention uses lipase and microbe cell as catalyst, and this can simplify material treatment and product collection, reduce reaction temperature, avoid the pollution of catalyst to glycerine as side product and eliminate pollutant exhaust.

Description

(1) Technical field [0001] The invention relates to the technical fields of enzyme engineering, environmental protection and renewable energy, in particular to a method for producing biodiesel through biocatalyzed oil transesterification. (2) Background technology [0002] Currently, biodiesel is mainly produced by chemical methods. Although the reaction speed of the chemical method is fast, there are some shortcomings that cannot be eliminated by itself: such as complex process, high alcohol excess, corresponding alcohol recovery device must be installed in the follow-up process, high energy consumption, waste lye discharge during the production process, etc. The production of biodiesel by biological method has the advantages of mild reaction conditions, small amount of alcohol, no pollutant discharge, etc., and can use cheap oil as raw material, thereby reducing production cost. The current biological method has the following limitations: first, methanol has a toxic effec...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 宗敏华吴虹
Owner SOUTH CHINA UNIV OF TECH
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