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Method for producing biodiesel by coupling enzyme method and acid-alkali method

A technology of biodiesel and acid-base method, which is applied in the fields of biofuel, fat production, petroleum industry, etc. It can solve the problems of long reaction time of pure enzymatic process, inability to switch to full enzymatic process, high transformation cost, etc., and achieve reduction Amount of acid slag and sewage, reduction of equipment investment cost, simple renovation process

Pending Publication Date: 2021-11-09
北京启迪德清生物能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional acid-base method adopts acid-catalyzed transesterification and alkali-catalyzed transesterification. The overall acid-base consumption is large, the waste water is large, and the yield is low. Manufacturers are basically looking for new technologies to transform and upgrade existing production lines to meet environmental protection requirements and improve production lines. comprehensive income
The reaction time of the pure enzymatic process is long. For the transformation project, due to the overall change, the transformation cost is high and the site is insufficient, it is impossible to switch to the whole enzymatic process.

Method used

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  • Method for producing biodiesel by coupling enzyme method and acid-alkali method

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Experimental program
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Effect test

Embodiment 1

[0031] like figure 1 Shown, a kind of method that adopts enzymatic method and acid-base method coupling to produce biodiesel, its preparation steps are:

[0032] S1 raw material oil (waste oil, acid value 140KOHmg / g, saponification value 190, water impurity 3%, pH value 4.8), liquid fat complex enzyme (according to mass ratio by esterase, lipase, sulfatase, phosphatase) 1:2:1:1 composition), 60% w / w dilute methanol, reaction aid (composed of activator ester acyl COA synthetase and protective agent according to equal mass ratio, wherein protective agent consists of sodium sulfate, sodium silicate and Sodium phosphate is obtained after mixing according to equal mass ratio) and mixed together, hydrolysis, lipidation, and translipidation three reactions occur at 40°C to obtain a final mixed solution of 12KOHmg / g (triglyceride has basically been converted); wherein, The consumption of described liquid fat composite enzyme is 2% by weight of raw material oil, the consumption of dil...

Embodiment 2

[0041] A method for producing biodiesel by coupling an enzymatic method with an acid-base method, the preparation steps of which are:

[0042]S1 raw material oil (gutter oil, acid value 68KOHmg / g, saponification value 186, pH value 6.6, water impurity 1.2%), liquid fat complex enzyme (according to mass ratio by esterase, lipase, sulfatase, phosphatase) 1:3:2:2 composition), 60% w / w dilute methanol, reaction aid (consists of activator ester acyl COA synthetase and protective agent according to equal mass ratio, wherein the protective agent consists of sodium sulfate, sodium silicate and Sodium phosphate is obtained after mixing according to the equal mass ratio) and mixed together, hydrolysis, lipidation, and translipidation three reactions occur at 50°C to obtain a final mixed solution of 12KOHmg / g (triglyceride has basically been converted); wherein, The consumption of described liquid fat compound enzyme is 5% by weight of raw material oil, the consumption of dilute methanol...

Embodiment 3

[0051] A method for producing biodiesel by coupling an enzymatic method with an acid-base method, the preparation steps of which are:

[0052] S1 raw material oil (acid value 160KOHmg / g, saponification value 193, pH value 4.5, water impurity 2.15%), liquid fat complex enzyme (by esterase, lipase, sulfatase, phosphatase according to mass ratio 1:3 : 2:1 composition), 60% w / w dilute methanol, reaction aid (composed of activator ester acyl COA synthetase and protective agent according to equal mass ratio, wherein protective agent is composed of sodium sulfate, sodium silicate and sodium phosphate according to obtained after equal mass ratio mixing) are mixed together, and hydrolysis, lipidation, and translipidation three reactions occur at 35° C. to obtain a final mixed solution of 12KOHmg / g (triglyceride has basically been converted); wherein, the The consumption of liquid fat complex enzyme is 3% of raw oil weight, the consumption of dilute methanol is 18% of raw material oil w...

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Abstract

The invention discloses a method for producing biodiesel by coupling an enzyme method and an acid-alkali method. The method comprises the following steps: mixing raw oil, liquid fat complex enzyme, dilute methanol and a reaction auxiliary agent together, and simultaneously performing three reactions of hydrolysis, esterification and transesterification; separating the mixed reaction liquid to obtain an oil phase and a water phase, and simultaneously recovering the enzyme for continuous repeated use; drying the oil phase, adding an acid catalyst, considering that the reaction at the stage is finished after the fatty acid reaction is finished, and taking away excessive methanol with dry air; adding alkali into the reacted oil phase for neutralization until the acid value is less than 0.5 KOHmg / g; and distilling the blended oil phase in a tower to obtain plant asphalt, light components and biodiesel. The method disclosed by the invention can effectively solve the problem that most traditional biodiesel factories are difficult to change and apply new equipment due to insufficient sites at present; and by introducing the enzyme method process, the acid and alkali consumption is greatly reduced, the pollution emission is reduced, the reaction time is shortened, the energy consumption is reduced, meanwhile, the transformation cost is reduced, and multiple purposes are achieved at one stroke.

Description

technical field [0001] The invention relates to a method for producing biodiesel, in particular to a method for producing biodiesel by coupling an enzyme method and an acid-base method. The invention belongs to the technical field of energy development and utilization. Background technique [0002] The scientific name of biodiesel is fatty acid methyl ester, which refers to the use of oil crops such as soybeans, rapeseed, cotton, palm, etc., wild oil plants and engineering microalgae and other aquatic vegetable oils, animal oils, and catering waste oils as raw materials. Methanol is a renewable diesel fuel that can replace petrochemical diesel produced through transesterification or thermochemical processes under the action of a catalyst. Its carbon chain is composed of C12-C18, while the carbon chain of petrochemical diesel is composed of C14-C16. Therefore, the carbon chain of biodiesel and petrochemical diesel is basically the same, so that it can replace petrochemical d...

Claims

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Application Information

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IPC IPC(8): C12P7/64C10L1/02C11B3/04C11B3/06
CPCC12P7/649C10L1/02C11B3/04C11B3/06Y02E50/10
Inventor 焦记稳朱罗乐
Owner 北京启迪德清生物能源科技有限公司