Method for preparing sodium alginate based on powder form absorption and separation

An adsorption separation and sodium alginate technology, which is applied in the field of sodium alginate preparation, can solve the problems of reducing production efficiency, affecting process progress, and slow reaction, and achieves the effects of improving progress, shortening digestion time, and increasing speed

Inactive Publication Date: 2018-05-01
江苏中大生物科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of preparing sodium alginate from kelp requires soaking and washing, digestion, dilution, foaming and floating, filtration, calcification, decalcification, dehydration, and neutralization. The steps are complex and numerous, especially in the digestion process. The paste-like glue is formed through the digestion of soda ash and kelp. This step generally takes 3 to 4 hours, and the reaction is relatively slow, which seriously affects the progress of the entire process and reduces production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of sodium alginate preparation method based on powder form adsorption separation, comprises steps as follows:

[0025] S1. Pre-processing: chop the kelp by a shredder, then send the chopped kelp into the water for cleaning, and immediately refrigerate the kelp after cleaning, and complete the refrigeration after the water on the surface of the kelp freezes. The temperature is minus 6°C, and the refrigerated time is 20 minutes. Finally, the kelp that has been refrigerated is ground into powdered kelp by a grinder, and the grinding time is 20 minutes; the powdered kelp is immersed in formaldehyde solution Stir evenly in the medium to obtain the powdery sea-tangle liquid, and the addition amount of the formaldehyde solution is 1 time of the powdery sea-tangle.

[0026] S2. Adsorption and separation: add silica airgel powder to the powdery kelp liquid, stir evenly to obtain a mixed solution, then let it stand, and after standing and layering, filter and separate the ...

Embodiment 2

[0032] A kind of sodium alginate preparation method based on powder form adsorption separation, comprises steps as follows:

[0033] S1. Pre-processing: chop the kelp by a shredder, then send the chopped kelp into the water for cleaning, and immediately refrigerate the kelp after cleaning, and complete the refrigeration after the water on the surface of the kelp freezes. The temperature is minus 8°C, and the refrigerated time is 25 minutes. Finally, the kelp that has been refrigerated is ground into powdered kelp by a grinder. The grinding time is 25 minutes; the powdered kelp is immersed in the formaldehyde solution and stirred Evenly, powdery sea-tangle liquid is obtained, and the addition of formaldehyde solution is 1.5 times of powdery body sea-tangle.

[0034] S2. Adsorption and separation: add silica airgel powder to the powdery kelp liquid, stir evenly to obtain a mixed solution, then let it stand, and after standing and layering, filter and separate the mixed solution ...

Embodiment 3

[0040] A kind of sodium alginate preparation method based on powder form adsorption separation, comprises steps as follows:

[0041] S1. Pre-processing: chop the kelp by a shredder, then send the chopped kelp into the water for cleaning, and immediately refrigerate the kelp after cleaning, and complete the refrigeration after the water on the surface of the kelp freezes. The temperature is minus 10°C, and the refrigerated time is 30 minutes. Finally, the kelp that has been refrigerated is ground into a powdered kelp by a grinder. The grinding time is 30 minutes; the powdered kelp is immersed in the formaldehyde solution and stirred Uniformly, powdery sea-tangle liquid is obtained, and the addition of formaldehyde solution is 2 times of powdery body sea-tangle.

[0042] S2. Adsorption and separation: add silica airgel powder to the powdery kelp liquid, stir evenly to obtain a mixed solution, then let it stand, and after standing and layering, filter and separate the mixed solutio...

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Abstract

The invention discloses a method for preparing sodium alginate based on powder form absorption and separation. The method comprises the following steps: S1, carrying out pretreatment; S2, carrying outabsorption and separating; S3, carrying out digestive foaming; S4, filtering; S5, carrying out calcification and decalcification; S6, neutralizing for realizing replacement. According to the method,silicon dioxide aerogel powder is added into powdered kelp liquid, the powdery kelp liquid is enabled to stand still so as to form a layered state by means of the absorption characteristics of the silicon dioxide aerogel powder, and a filtering membrane is cooperatively used for realizing filtration and separation; the method is ingenious in process, and enables the extraction of the powdered kelpnot to be affected while enabling the kelp to fully absorb formaldehyde for realizing fixation. The absorption way of the method provided by the invention is more convenient and quicker than that ofsponge.

Description

technical field [0001] The invention relates to a preparation method of sodium alginate based on powder form adsorption separation. Background technique [0002] Sodium alginate, also known as sodium alginate, is a kind of natural polysaccharide extracted from the cell wall of brown algae. It is essentially a linear natural polymer. Sodium alginate is composed of β-D-mannuronic acid (M area) It is connected with α-L-guluronic acid (region G) through glycosidic bonds. The physical properties and gel properties of alginate depend on the relative composition of uronic acid residues and the distribution of the three regions. Because sodium alginate has good sol-gel properties, it is widely used in industry, agriculture, Medicine and many other fields, and shows a good application prospect. At present, the process of preparing sodium alginate from kelp requires soaking and washing, digestion, dilution, foaming and floating, filtration, calcification, decalcification, dehydratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04
CPCC08B37/0003C08B37/0084
Inventor 王永昌王经佐徐根华
Owner 江苏中大生物科技集团有限公司
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