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Method for extracting and separating grease from seaweed

A technology of oil separation and extraction, which is applied in the direction of oil/fat production and fat generation, can solve the problems of high environmental pollution and low efficiency, and achieve the effect of high extraction rate and simple operation

Active Publication Date: 2021-10-01
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional three-phase separation uses tert-butanol as a solvent, which has great environmental pollution and low efficiency

Method used

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  • Method for extracting and separating grease from seaweed
  • Method for extracting and separating grease from seaweed
  • Method for extracting and separating grease from seaweed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0029] Different proportions of hydrogen bond acceptors and hydrogen bond acceptors were used to prepare deep eutectic solvents. The preparation method is as follows:

[0030] Using menthol as a hydrogen bond donor and tetramethylguanidine as a hydrogen bond acceptor, add them into a round-bottomed flask in a certain proportion for mixing, heat in a water bath to 60-80°C, and stir to react to obtain a deep eutectic solvent; wherein, The molar ratios of hydrogen bond acceptors and hydrogen bond donors are shown in Table 1:

[0031] Table 1 Molar ratios of hydrogen bond donors and hydrogen bond acceptors in deep eutectic solvents

[0032]

[0033]

Embodiment 6～10

[0035] The deep eutectic solvent samples made in Examples 1 to 5 were respectively used to extract oils and fats in seaweed, specifically including the following steps:

[0036] S1. Add seaweed, deep eutectic solvent, and ammonium sulfate aqueous solution into a test tube at a solid-to-liquid ratio of 1g:30mL for mixing, and then carry out an extraction reaction at 70°C for 70 minutes;

[0037] S2. After the extraction is completed, solid-liquid separation is performed to obtain a mixed solution, and carbon dioxide is introduced into the mixed solution for separation and recovery;

[0038] Wherein, the concentration of ammonium sulfate aqueous solution is 20wt%.

[0039] After the extraction, the aqueous phase, oil and deep eutectic solvent were separated, and the extraction rate of each sample to oil was tested, and the results are shown in Table 2.

Embodiment 11

[0041] The extraction method of this example is the same as that of Example 6, except that tert-butanol is used instead of the deep eutectic solvent for extraction, and the extraction results are shown in Table 2.

[0042] Table 2 embodiment 6~11 to the extraction rate of oil in seaweed

[0043] Example type Oil extraction rate (mg / g) 6 Sample No. 1 153.18 7 No. 2 sample 155.22 8 Sample No. 3 160.09 9 No. 4 sample 156.85 10 Sample No. 5 154.44 11 tert-butanol 134.10

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Abstract

The invention provides a method for extracting and separating grease from seaweed, comprising the following steps: S1, mixing the seaweed, a deep eutectic solvent and an inorganic salt solution for grease extraction; s2, after grease extraction of the to-be-constructed three-phase separation system is completed, performing solid-liquid separation to obtain a mixed solution, and feeding carbon dioxide into the mixed solution for separation and recovery, wherein the eutecticevaporate solvent is a carbon dioxide response type eutecticevaporate solvent, and wherein the inorganic salt is at least one of soluble sulfate, phosphate and carbonate. The method comprises the following steps: constructing a three-phase separation system by adopting a carbon dioxide response type eutectic solvent to extract algae; after the extraction is completed, introducing carbon dioxide to separate the grease, the deep-eutectic solvent and the water phase; therefore, grease extraction and separation of the deep-eutectic solvent, the grease and the water phase are realized, and the deep-eutectic solvent is recovered for cyclic utilization.

Description

technical field [0001] The invention relates to the technical field of oil extraction, in particular to a method for extracting and separating oil from seaweed. Background technique [0002] Traditional oil extraction methods usually use organic solvents as extraction agents, or combine ultrasonic extraction and microwave-assisted extraction. These methods consume a large amount of organic solvents, causing serious environmental impact. There are related literatures reporting new methods for extracting oil by three-phase separation system. Although these methods are effective, they also use a large amount of organic solvents such as tert-butanol. [0003] Deep eutectic solvents are used as extractants to extract and isolate biologically active substances from natural plant resources. However, there is a big problem with these methods. Due to the non-volatility of the deep eutectic solvent, it is difficult to separate the target product from the extractant. Therefore, bac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10
CPCC11B1/10C11B1/108
Inventor 谭志坚蔡昌湧易永建余旺曾粮斌杨媛茹汪洪鹰
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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