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Method for extracting carotenoid and liquid biological fuel from Dunaliella sallina

A Dunaliella salina and carotene technology is applied in the production of bulk chemicals, the preparation of liquid hydrocarbon mixtures, and the petroleum industry. It can solve the problems of underutilization of algae residues, low quality ratio, and waste of resources. Easy recycling, simple process and high equipment utilization

Active Publication Date: 2010-07-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole extraction process is simple and does not need to add any chemical reagents, it is environmentally friendly, and the recovery rate of carotenoids and edible glycerin is high, but this patent has two shortcomings: 1. Carotenoids and other extraction products account for a small proportion of the total mass of Salina salina , a large amount of algae residue left after extraction has not been fully utilized
However, it still contains a large amount of esters, proteins, polysaccharides and other components, resulting in a waste of resources
2. The concentrated algae paste is first dehydrated and dried, and the dried algae paste is used as the raw material for extraction. Dehydration and drying greatly increase the energy consumption of the process

Method used

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  • Method for extracting carotenoid and liquid biological fuel from Dunaliella sallina
  • Method for extracting carotenoid and liquid biological fuel from Dunaliella sallina
  • Method for extracting carotenoid and liquid biological fuel from Dunaliella sallina

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Effect test

Embodiment 1

[0027] The above water-containing algae paste is extracted with supercritical carbon dioxide to obtain carotenoids and algae residue liquid. The temperature of the supercritical carbon dioxide in the extraction kettle is 35°C and the pressure is 10MPa, and the obtained carotenoid content accounts for 14% of the mass fraction of the product; 17MPa, the reaction time is 40min, using Na 2 CO 3 As a catalyst, when the mass ratio of the catalyst dosage to the algae residue liquid is 4:100, the yield of the obtained biofuel oil is 27%. The properties of the biofuel oil are shown in Table 2.

Embodiment 2

[0029]Carry out supercritical carbon dioxide extraction on the above-mentioned water-containing algae paste, the temperature of the supercritical carbon dioxide in the extraction kettle is 40°C, the pressure is 18MPa, and the obtained carotenoid content accounts for 18% of the mass fraction of the product; then use super / near-critical water to liquefy the algae residue liquid, at a reaction temperature of 340°C, a pressure of 15MPa, and a reaction time of 30min, using K 2 CO 3 It is a catalyst, and the mass ratio of catalyst dosage to algae residue liquid is 2.5:100, and the yield of biofuel oil is 24% under this condition. The properties of biofuel oil are shown in Table 2.

Embodiment 3

[0031] Use supercritical carbon dioxide to extract the above-mentioned water-containing algae paste. The temperature of the supercritical carbon dioxide in the extraction kettle is 40 ° C and the pressure is 16 MPa. The carotenoid content obtained accounts for 16% of the mass fraction of the product; then use super / near critical water to liquefy Algae residue liquid, when reaction temperature is 360 ℃, pressure is 18MPa, reaction time is 20min, adopts KOH as catalyst, when the mass ratio of catalyst dosage and algae residue liquid is 3:100, the productive rate of biofuel oil under this condition is 25%. The properties of biofuel oil are shown in Table 2.

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Abstract

The invention discloses a method for extracting carotenoid and liquid biological fuel from Dunaliella sallina, which belongs to the technical fields of bioactive substance extraction and biological energy. The method comprises the following steps of: concentrating a Dunalielle sallina liquid by using a hollow fiber membrane and a centrifugal separation method to obtain an aqueous sallina paste, extracting the aqueous sallina paste by using supercritical carbon dioxide to obtain a carotenoid product and a sallina residue liquid, and liquefying the sallina residue liquid by using supercritical / near-critical water to obtain the biological fuel. The invention has the advantages of no need of drying raw materials, low energy consumption, environment protection for entire process, simple technology, high utilization ratio of equipment, conduction of extraction using supercritical carbon dioxide and liquefaction using supercritical / near-critical water in the same reaction kettle, high yield of carotenoid and the biological fuel, low production cost and suitability for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of bioactive substance extraction and biomass energy, and particularly relates to a method for extracting carotenoids from Dunaliella salina and liquefying them to prepare biofuel. Background technique [0002] With the decreasing amount of exploitable fossil fuels and the aggravation of environmental pollution caused by the use of fossil energy, the development of biomass resources based on energy utilization has attracted widespread attention. The use of biofuels can reduce dependence on fossil fuels, while the use process is very clean, does not produce net carbon dioxide emissions, does not produce sulfur, NO x Wait. [0003] Microalgae is a very important biomass resource, among which Dunaliella salina is a halophilic planktonic unicellular eukaryotic algae with bare protoplasm, which has good salt tolerance, alkali resistance and strong light resistance. Sex, high photosynthetic efficiency, strong en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C403/24C10G1/00
CPCY02P20/54
Inventor 吴玉龙杨明德林飞党杰陈镇胡湖生刘吉邹树平
Owner TSINGHUA UNIV
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