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Method for preparing calcium alginate

A technology of calcium alginate and alginic acid, which is applied in the field of preparation of calcium alginate, can solve problems such as unfavorable drying, unsuitable for large-scale production, and affecting product purity and quality, and achieve the benefits of drying, good safety, and improved quality. Effect

Active Publication Date: 2013-03-20
QINGDAO BRIGHT MOON SEAWEED GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method for preparing calcium alginate is based on sodium alginate products to prepare calcium alginate gel particles, and other components are introduced in the reaction, which affects the purity and quality of the product. At the same time, the gel prepared by the method has good Water retention effect, but not conducive to drying, not suitable for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of calcium alginate of the present invention comprises the following steps:

[0029] 1. Soak the kelp with water, then add 12% soda ash, keep it digested at 40°C for 5 hours, dilute with water, and filter to obtain sodium alginate solution.

[0030] 2. Add 12% calcium aqueous solution for calcification.

[0031] 3. Add 8% hydrochloric acid solution to decalcify, add water to wash, and dehydrate to 70% water.

[0032] 4. After granulation, freeze to -44°C and then pulverize. The pulverized particle size is 30 mesh.

[0033] 5. Take 30kg of frozen and pulverized alginic acid, add 30kg of 18% alcohol, and add calcium carbonate to adjust the pH to neutral.

[0034] 6. Centrifuge, dry and pulverize to obtain calcium alginate product.

[0035] The experimental results of the obtained calcium alginate product: water content 10%, total number of bacteria ≤ 1000cfu / g, mold and yeast ≤ 100cfu / g, lead < 4ppm, arsenic < 2ppm.

Embodiment 2

[0037] 1. Soak brown algae in water, add 22% soda ash, digest at 50°C for 7 hours, dilute with water, and filter to obtain sodium alginate solution.

[0038] 2. Add 10% calcium aqueous solution for calcification.

[0039] 3. Add 9% hydrochloric acid solution to decalcify, add water to wash, and dehydrate to 63% water.

[0040] 4. After granulation, freeze to -28°C and then pulverize. The pulverized particle size is 40 mesh.

[0041] 5. Take 30kg of frozen and pulverized alginic acid, add 40kg of 13% isopropanol, and add calcium bicarbonate to adjust the pH to neutral.

[0042] 6. Centrifuge, dry and pulverize to obtain calcium alginate product.

[0043] The experimental results of the obtained calcium alginate: moisture 13%, total number of bacteria ≤ 1000cfu / g, mold and yeast ≤ 100cfu / g, lead < 4ppm, arsenic < 2ppm.

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Abstract

The invention provides a method for preparing calcium alginate, comprising the following steps: soaking brown algae, and adding soda ash to digest and extract an alginic acid; washing and dehydrating; granulating; carrying out cryogenic grinding; calcifying; dehydrating; drying and grinding. The flocculent alginic acid is changed into powder in the process of preparing to be convenient for subsequent processing. The prepared calcium alginate has good stability, safety and flowability and is easy to disperse when in use. As the processes of cryogenic grinding and liquid-phase calcifying are adopted, the quality of the product can be improved, the drying can be carried out easily, and the scale production can be achieved. As the alga powder is dispersed into an organic solvent, and a calcifying agent is added to calcify, the purifying can be carried out while calcifying. The final product can be used for producing pharmaceutical products, cosmetic products and other high-end products.

Description

technical field [0001] The invention relates to a preparation method of 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. It is widely used in food, Pharmaceutical, textile, printing and dyeing, papermaking, daily chemical and other products, as thickener, emulsifier, stabilizer, adhesive, sizing agent, etc. Calcium alginate is insoluble in water, hardly soluble in organic solvents such as ethanol, but slowly soluble in sodium polyphosphate, sodium carbonate solution and sodium chloride solution. 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 suspension, thickening and stability, emulsifica...

Claims

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Application Information

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IPC IPC(8): C08B37/04
Inventor 刘俊霞李可昌安丰欣王超王磊申胜标
Owner QINGDAO BRIGHT MOON SEAWEED GROUP
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