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Preparation method of food-grade calcium alginate

A calcium alginate, food-grade technology, applied in the field of preparation of food-grade calcium alginate, can solve problems such as high cost and complicated process, and achieve the effects of improving color, shortening process flow and reducing production cost.

Active Publication Date: 2016-04-20
江苏明月海洋生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the sodium alginate extracted from brown algae is added to the calcium preparation for calcification, then acidified to extract alginic acid, then granulated, frozen and crushed, and then calcium preparation is added for calcification, dehydration, and drying. The process is more complicated and the cost is higher.

Method used

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Examples

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preparation example Construction

[0019] The invention provides a preparation method of food-grade calcium alginate, the steps are as follows:

[0020] 1) Preparation of sodium alginate: adding water equivalent to 6-10 times the weight of dry brown algae to soak brown algae; adding sodium carbonate with a weight of 20-30% of dry brown algae, and performing a digestion reaction at 40-60°C for 4-8 hours to obtain alginic acid Sodium; dilute the glue solution with water equivalent to 80-120 times the quality of dry brown algae; air flotation separation to obtain a clarified sodium alginate solution; wherein the brown algae is one or more of kelp, macroalgae, Ascophyllum nodosum, and sargasso kind.

[0021] 2) Purification of sodium alginate: adding diatomite to the above-mentioned clarified sodium alginate solution for adsorption and filter aid; -200 mesh (the preferred model is Xinghui SY-RS600). Adding diatomaceous earth can absorb impurities such as pigments and heavy metals in the alginate solution, improve...

Embodiment 1

[0029] The preparation method of calcium alginate of the present invention comprises the following steps:

[0030] 1. Kelp soaking and digestion: Soak the kelp with water for 12 hours, then add sodium carbonate with 20% of the dry kelp mass, heat and digest at 40°C for 5 hours, then break the kelp with mechanical stirring; add 100 times the weight of the dry kelp raw material The glue solution is diluted with water, and a clear sodium alginate solution is obtained after air flotation separation;

[0031] 2. Purification of sodium alginate: add diatomite with a solution quality of 1.3‰ to the sodium alginate solution, and the diatomite mesh is 100 mesh (model is Xinghui SY-RS600);

[0032] 3. Filtration: separate the mixture of sodium alginate and diatomaceous earth through plate and frame filtration to obtain a clear glue;

[0033] 4. Bleaching: 1m into the glue 3 / h chlorine, bleach glue.

[0034] 5. Preparation of calcium alginate: adding a mass concentration of 13% calci...

Embodiment 2

[0039] 1. Kelp soaking and digestion: Soak the kelp with water for 12 hours, then add sodium carbonate with 23% of the dry kelp mass, heat and digest at 50°C for 4 hours, break the kelp with mechanical stirring; add 100 times the weight of the dry kelp raw material The glue solution was diluted with water, and a clear sodium alginate solution was obtained after air flotation separation.

[0040] 2. Purification of sodium alginate: Add diatomite with a glue quality of 2.0‰ to the sodium alginate solution, and the mesh number of diatomite is 100 mesh (model is Xinghui SY-RS600).

[0041] 3. Filtration: Separate the mixed solution of sodium alginate and diatomaceous earth through vacuum filtration to obtain a clear glue solution.

[0042] 4. Bleaching: glue bleaching: through 1.2m 3 / h chlorine, bleach glue.

[0043] 5. Calcium alginate preparation: add calcium chloride solution with a mass concentration of 14% to the glue, the amount of calcium chloride solution is 2.1% of the...

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PUM

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Abstract

The invention discloses a preparation method of food-grade calcium alginate. The preparation method comprises the following steps: embathing brown alga, and adding sodium carbonate for digesting the brown alga to extract alginic acid; diluting and filtering the product; carrying out air air floatation separation; carrying out fine filtration; introducing chlorine gas for bleaching; adding calcium chloride solution to enable water-soluble sodium alginate to be converted into water-insoluble calcium alginate; washing; carrying out dehydration; drying; grinding. According to the preparation method, kieselguhr is added for fine filtration, so that harmful substances such as pigment, heavy metal and the like are removed; the produced calcium alginate meets the food grade requirements and is widely used in the industries such as medicines, food and daily use chemical.

Description

technical field [0001] The invention belongs to the technical field of preparing calcium alginate, in particular to a preparation method of food-grade calcium alginate. Background technique [0002] Alginate is a natural polysaccharide extracted from brown algae such as kelp, sargassum, macroalgae, and Ascophyllum nodosum. The commonly used alginate is water-soluble alginate such as sodium alginate and potassium alginate, while calcium alginate is A water-insoluble alginate, which has good food safety and can be used as a gel thickener, calcium supplement, etc. It has been listed as a food additive in Japan, Russia, the European Union, the United States and other countries. Since 2016, the domestic Calcium alginate will be allowed to be used as a food additive. Utilizing the characteristics of calcium alginate dispersing in water, adding alkali or dissolving in salt, it is widely used in medicine, food, chemical industry and other industries, and exerts the functions of sus...

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 窦有涛徐泽斌王超安丰欣王友峰
Owner 江苏明月海洋生物科技有限公司
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