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Refining method for microalgae biodiesel

A technology of microalgae and diesel, which is applied in the fields of biofuel, petroleum industry, fat production, etc., can solve the problem of high cost of drying operation, and achieve the effect of reducing loss, saving time, and simple and efficient steps

Inactive Publication Date: 2016-09-28
KUNSHAN QINGXU ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the environment with high water content is conducive to the growth of microalgae, the water content of the harvested microalgae is usually high, and it must be fully dried before oil extraction, and the drying operation costs a lot, which can account for the amount of microalgae biodiesel. One-third to one-half of the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for refining microalgae biodiesel, which comprises the steps of crushing microalgae, extracting algae slurry, in-situ extraction and separation and purification to complete the extraction of microalgae biodiesel, and the specific steps are as follows:

[0021] (1) Broken microalgae: After harvesting the microalgae, pass the algae liquid into the crushing tank, and use ultrasonic waves to crush the microalgae.

[0022] (2) Extraction of algae pulp: the algae liquid after the crushed microalgae is flowed into the sedimentation tank through the water pump, and it is naturally precipitated to form upper and lower layers. .

[0023] (3) In-situ extraction: add reactant and extractant into the reaction tank with algae slurry, the reactant is a mixture of methanol and concentrated sulfuric acid, the volume ratio of concentrated sulfuric acid to methanol is 0.03:1, concentrated sulfuric acid is used as a catalyst, The extractant is n-hexane, the volume ratio of the re...

Embodiment 2

[0027] A method for refining microalgae biodiesel, which comprises the steps of crushing microalgae, extracting algae slurry, in-situ extraction and separation and purification to complete the extraction of microalgae biodiesel, and the specific steps are as follows:

[0028] (1) Broken microalgae: After harvesting the microalgae, pass the algae liquid into the crushing tank, and use ultrasonic waves to crush the microalgae.

[0029] (2) Extraction of algae pulp: the algae liquid after the crushed microalgae is flowed into the sedimentation tank through the water pump, and it is naturally precipitated to form upper and lower layers. .

[0030] (3) In-situ extraction: add reactant and extractant to the reaction tank with algae slurry, the reactant is a mixture of methanol and concentrated sulfuric acid, the volume ratio of methanol to concentrated sulfuric acid is 0.03:1, concentrated sulfuric acid is used as a catalyst, The extractant is n-hexane, the volume ratio of the reac...

Embodiment 3

[0034] A method for refining microalgae biodiesel, which comprises the steps of crushing microalgae, extracting algae slurry, in-situ extraction and separation and purification to complete the extraction of microalgae biodiesel, and the specific steps are as follows:

[0035] (1) Broken microalgae: After harvesting the microalgae, pass the algae liquid into the crushing tank, and use ultrasonic waves to crush the microalgae.

[0036] (2) Extraction of algae pulp: the algae liquid after the crushed microalgae is flowed into the sedimentation tank through the water pump, and it is naturally precipitated to form upper and lower layers. .

[0037] (3) In-situ extraction: add reactant and extractant to the reaction tank with algae slurry, the reactant is a mixture of methanol and concentrated sulfuric acid, the volume ratio of methanol to concentrated sulfuric acid is 0.04:1, concentrated sulfuric acid is used as a catalyst, The extractant is n-hexane, the volume ratio of the reac...

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Abstract

The invention relates to a refining method for microalgae biodiesel. The method includes the following steps that microalgae smashing is carried out, wherein after microalgae are harvested, algae liquid is introduced into a smashing tank, and the microalgae are smashed with ultrasonic waves; the algae liquid obtained after the microalgae are smashed is made to flow into a settling tank through a water pump, natural settling is performed, upper and lower layers are formed with upper-layer liquid being water and lower-layer liquid being algae slurry, and the lower-layer algae slurry is pumped into a reaction tank; in-situ extraction is carried out, wherein a reactant and an extraction agent are added into the reaction tank with the algae slurry, the mixture is heated to 60-80 DEG C and stirred constantly, and in-situ extraction starts; separation and purification are carried out, wherein after extraction is completed, upper-layer liquid is pumped into a collecting tank, heating and stirring are carried out at the same time, the extraction agent evaporates and enters a condenser, and the material remaining in the reaction tank is biodiesel. The method has the advantages that the material loss is reduced, the steps are simple, operation is easy and convenient, and the yield is close to 100%.

Description

technical field [0001] The invention relates to the field of bioenergy, in particular to a method for refining microalgae biodiesel. Background technique [0002] With the development of modern industry and the rapid increase of population, the world's demand for energy is increasing, and the exploitation and utilization of earth resources are also increasing. Energy and environmental issues have become the focus of human attention. According to relevant assessment reports, according to the current speed, the world's traditional oil resources will be exhausted in 40 years. With the depletion of oil and coal resources and the air pollution caused by their combustion, countries around the world are actively developing and utilizing renewable new resources. [0003] The common method for producing biodiesel is the transesterification method, which is a process in which oil and methanol are heated and reacted under acid or base catalysis to form fatty acid methyl esters and the...

Claims

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Application Information

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IPC IPC(8): C11B1/04C11B1/10C11C3/10C10L1/02
CPCC10L1/02C11B1/04C11B1/10C11C3/10Y02E50/10
Inventor 石健张雯婕袁银男
Owner KUNSHAN QINGXU ENVIRONMENT TECH
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