Method and system for separating microalgae grease

A microalgae oil and separation method technology, applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the problem of affecting the separation purity and efficiency of microalgae components, the difficulty of oil phase and water phase separation, and many operating steps and other problems, to achieve the effect of no extractant residue, high extraction and separation efficiency, and high oil purity

Pending Publication Date: 2019-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] It can be seen from the above that the prior art must firstly carry out wall-breaking treatment with relatively harsh conditions (such as high-pressure homogeneous wall-breaking, enzymatic degradation or steam wall-breaking, etc.), and then carry out component separation, and all the obtained oil-water mixtures , requires demulsification and oil-water separation to obtain oil extracts and water extracts. There are many operating steps, high cost, low demulsification efficiency, and difficult separation of oil phase and water phase, which ultimately affects the purity and efficiency of microalgae component separation.

Method used

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  • Method and system for separating microalgae grease

Examples

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Effect test

Embodiment 1

[0062] Take 300 grams of air-dried monoacipes, and the water content is 8% by weight. Add 30 grams of water after mechanical crushing, and after mixing, press and slice into thin slices with a length of about 10 mm, a width of about 5 mm, and a thickness of about 0.5 mm. Place the single needle algae flakes in a stainless steel extraction kettle with a volume of 10L, and after vacuuming with a vacuum pump, add 3L of butane / dimethyl ether mixed solvent (the molar ratio of butane to dimethyl ether is 1:2.3), under pressure Extract at 0.7MPa and a temperature of 45°C, repeat the extraction 3 times, and extract for 40 minutes each time. After each extraction, the extracted mixture is put into a stainless steel grease separation kettle with a volume of 10L, and the stainless steel grease separation kettle is decompressed to -0.01MPa recovers the extractant to obtain microalgae oil. After the extractant passes through the buffer tank, the residual oil is removed to obtain a pure ex...

Embodiment 2

[0065] Take 210 grams of air-dried Scenedesmus, with a water content of 10% by weight. Add 12 grams of water after mechanical crushing, and after mixing, press and slice into thin slices with a length of about 10 mm, a width of about 5 mm, and a thickness of about 0.5 mm. Place the Scenedesmus flakes in a stainless steel extraction kettle with a volume of 10 L, and after vacuuming with a vacuum pump, add 3 L of butane / dimethyl ether mixed solvent (the molar ratio of butane to dimethyl ether is 1:0.1), at a pressure of 0.6 Extract at MPa and temperature of 48°C, repeat the extraction 4 times, each extraction takes 35 minutes, and the extraction mixture obtained after each extraction is put into a stainless steel grease separation kettle with a volume of 10L, and the stainless steel grease separation kettle is decompressed to - 0.02MPa recovers the extractant to obtain microalgae oil. After the extractant passes through the buffer tank, the residual grease is removed to obtain ...

Embodiment 3

[0068] Take 230 grams of air-dried spirulina, and the water content is 7% by weight. Add 20 grams of water after mechanical crushing, and after mixing, press and slice into flakes with a length of about 10 mm, a width of about 5 mm, and a thickness of about 0.5 mm. Place the spirulina flakes in a stainless steel extraction kettle with a volume of 10L, and after vacuuming with a vacuum pump, add 3L of butane / dimethyl ether mixed solvent (the molar ratio of butane to dimethyl ether is 1:10), at a pressure of 0.71 Extract at MPa and temperature 40°C, repeat the extraction 6 times, each time for 30 minutes, the extraction mixture obtained after each extraction is put into a stainless steel grease separation kettle with a volume of 10L, and the stainless steel grease separation kettle is decompressed to - 0.05MPa recovers the extractant to obtain microalgae oil. After the extractant passes through the buffer tank, the residual grease is removed to obtain a pure extractant, which i...

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Abstract

The invention relates to the technical field of microalgae bioengineering, and discloses a method and a system for separating microalgae grease. The method comprises the following steps: (1) microalgae are extracted under pressure of 0.1 MPa or higher with an extractant, and algae residues and an extraction mixture are obtained, wherein the extractant is an organic substance which is capable of being liquefied and extracting grease under pressure of 0.1 MPa or higher and is gas phase at normal temperature and pressure; (2) the extraction mixture is decompressed to recover the extractant, and the microalgae grease is obtained. The method has the advantages of high extraction separation efficiency, high speed, high grease purity and low cost and is environmentally friendly and pollution-free, and extractant residues are absent in the solid phase.

Description

technical field [0001] The invention relates to the technical field of microalgae bioengineering, in particular to a method and system for separating oil from microalgae. Background technique [0002] Microalgae are single-celled organisms with wide distribution, fast growth rate and simple structure. When microalgae grow, they can fix a large amount of carbon dioxide, which is of great significance for reducing carbon dioxide in the atmosphere. [0003] Through their own unique metabolic process, microalgae can produce a variety of valuable compounds with unique structures, including microalgal oils, proteins, polysaccharides, vitamins, etc., and are promising economic crops. Making full use of various components in microalgae can not only increase the economic value of microalgae, but also effectively reduce the cost of reducing carbon dioxide emissions from microalgae, laying the foundation for the large-scale application of microalgae farming. [0004] Therefore, the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B3/00
CPCC11B1/10C11B3/00
Inventor 刘伟孙春燕周旭华
Owner CHINA PETROLEUM & CHEM CORP
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