Method for extracting and preparing low molecular weight fucoidin from marine brown algae

A technology for molecular fucoid and fucoidan is applied in the field of extraction and preparation of low molecular fucoidan, which can solve the problems of no industrialized production mode and process, difficulty in meeting the needs of sales, low content, etc. The effect of reducing the use of alkali and improving the extraction rate

Active Publication Date: 2012-07-04
SHANDONG JIEJING GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, seaweed chemical companies have gradually started to extract fucoidan from kelp, but the content is very low, and no fixed industrial p...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 100 kilograms of lightly dried kelp, Ascophyllum nodosum, blackened Leisongella or barkweed, add 500 liters of tap water and soak for 1.5 hours, and collect the soaking liquid. Cut the kelp into 2-5cm, then add 500 liters of tap water to soak for 3 hours, and collect the secondary soaking water. Combine soak water and filter through a sand filter filled with quartz sand. The filtered water is then filtered sequentially with a vacuum drum filter pre-coated with perlite and diatomaceous earth, and finally filtered again with a plate-and-frame filter pre-coated with diatomaceous earth, and the filtered liquid is retained.

[0023] Pass the filtered clear liquid through the operating pressure of 0.5-3.0kg / cm 2 The electrodialysis device was used for dialysis, and then the 4040 membrane element reverse osmosis equipment was used for desalination, so that the salinity of the filtrate reached 0.9%, and the raw material solution was obtained.

[0024] The raw material s...

Embodiment 2

[0027] Weigh 100 kg of dried macroalgae such as Ascophyllum nodosum, blackened Leisong algae or bark algae or dry kelp, add 700L tap water to soak for 3.0h, and collect the soaking liquid. Continue to add 500 liters of tap water to 700 L to soak for 4 hours, and collect the secondary soaking water. Combine soak water and filter through a sand filter filled with quartz sand. After filtering, filter successively with a vacuum drum filter pre-coated with perlite and diatomaceous earth, and finally filter again with a plate-and-frame filter pre-coated with diatomaceous earth, and retain the filtrate.

[0028] Pass the above-mentioned filtered clear liquid through the operating pressure of 0.5-3.0kg / cm 2 The electrodialysis device is used for electrodialysis, and then the 4040 membrane element reverse osmosis equipment is used for desalination to make the solution salinity reach 1.0%. Continue to use a polysulfone membrane ultrafiltration machine (molecular weight ≤ 80,000 Dalton...

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PUM

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Abstract

The invention relates to the field of seaweed chemicals, in particular to a method for extracting and preparing low molecular weight fucoidin from marine brown algae. The method comprises the following steps of: soaking the brown algae serving as raw materials in water, extracting for 1.5 to 3.0 hours, filtering, desalting filtrate to ensure that the salinity of the filtrate is 0.6 to 1.0 percent, performing ultrafiltration concentration on the desalted filtrate until volume is 1/20 to 1/30 of the original volume, and taking a concentrated solution as a raw material solution for later use; and adding ethanol into the raw material solution until the concentration of the ethanol in the raw material solution is 60 to 70 percent (v/v), filtering, concentrating the obtained precipitate under reduced pressure until water content is 10 to 15 percent, and thus obtaining low-purity fucoidin. By the method, the low molecular weight fucoidin with the L-fucose content of 15 to 40 percent, the organic sulfate radical content of 20 to 40 percent and the molecular weight of less than 50,000 Daltons is obtained.

Description

technical field [0001] The invention relates to the field of seaweed chemical industry, in particular to a method for extracting and preparing low-molecular-weight fucoidan from marine brown algae. Background technique [0002] my country's seaweed chemical industry started in the late 1960s. After decades of development, my country's current annual output of sodium alginate has reached more than 30,000 tons, and it has become the world's largest producer of seaweed chemical products. Among them, sodium alginate, iodine and Mannitol as the main product. However, due to reasons such as single product, backward technology, high energy consumption and high pollution, the large-scale development of kelp cultivation and kelp processing in my country has been seriously restricted. The development of new technologies and new products for seaweed processing with "high added value, low cost, and high efficiency" has become a new development direction and an urgent requirement for my ...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 林鹤峰申健王斌李优林
Owner SHANDONG JIEJING GROUP CORP
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