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A kind of preparation method of sodium alginate

A technology of sodium alginate and alginic acid, which is applied in the field of preparation of sodium alginate, can solve the problems of reducing production efficiency, slow reaction, affecting process progress, etc., and achieve the effect of improving progress, increasing speed, and shortening digestion time

Active Publication Date: 2020-05-12
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

[0025] A kind of preparation method of sodium alginate, comprises steps as follows:

[0026] 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.

[0027] S2. Adsorption filtration: select an adsorption sponge with a columnar or oblate structure and put it into the powdery kelp liquid to adsorb and filter the powdery kelp, so that the powdery kelp is separated from the formaldehyde solution; ...

Embodiment 2

[0033] A kind of preparation method of sodium alginate, comprises steps as follows:

[0034] 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.

[0035] S2. Adsorption filtration: select an adsorption sponge with a columnar or oblate structure and put it into the powdery kelp liquid to adsorb and filter the powdery kelp, so that the powdery kelp is separated from the formaldehyde solution; rinse the kelp ...

Embodiment 3

[0041] A kind of preparation method of sodium alginate, comprises steps as follows:

[0042] 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.

[0043] S2. Adsorption filtration: select an adsorption sponge with a columnar or oblate structure and put it into the powdery kelp liquid to adsorb and filter the powdery kelp, so that the powdery kelp is separated from the formaldehyde solution; rinse the kel...

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PUM

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Abstract

The invention discloses a preparation method of sodium alginate. The preparation method comprises the following steps: S1, carrying out pre-treatment; S, adsorbing and filtering; S3, digesting and foaming; S4, filtering; S5, carrying out calcification and de-calcification; S6, carrying out neutralization and displacement. By adopting the preparation method disclosed by the invention, a physical shape of traditional pre-treated kelp is changed; in a pre-treatment process, the washed kelp is immediately frozen so that water on the surfaces of the kelp is frozen and then the kelp is conveyed intoa grinding machine and are ground to form powdery kelp; subsequent preparation which is carried out by adopting the powdery kelp shape belongs to the initiation of the field; the kelp has the powderyshape so that in a digestion technology, sodium carbonate more easily permeates the kelp; the digestion time of the sodium carbonate and the kelp is shortened in multiples and the progress of the whole technology is improved.

Description

technical field [0001] The invention relates to a preparation method of sodium alginate. 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, dehydration, and neutralization. The steps are comple...

Claims

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Application Information

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Patent Type & Authority Patents(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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