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Preparation method of high-viscosity alginate

A alginate and high-viscosity technology, which is applied in the field of preparation of high-viscosity alginate, can solve the problems of difficult dehydration and drying, difficult to realize, and the introduction of sodium chloride cannot be fundamentally eliminated, so as to save granulation steps and simple process Effect

Active Publication Date: 2013-04-17
连云港隆源海藻有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses sodium chloride to react with calcium alginate for ion exchange decalcification, but this is a reversible reaction, and the introduction of sodium chloride cannot be fundamentally eliminated; while the insoluble calcium alginate in the wet state is partially converted into water-soluble alginic acid Sodium, this highly viscous material makes dehydration and drying very difficult
It is difficult to realize in actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Soak the non-deteriorated dry kelp at 20°C for 2 hours, wash, add soda ash with 12% of the mass of kelp, heat it at 40°C for 4 hours, extract alginic acid, press until the water content of alginic acid is 45%, crush, weigh Take 10kg of alginic acid in a solid-phase neutralizer, stir, add 230g of solid calcium carbonate to react for 20 minutes, add sodium carbonate to neutralize, the fiber state partially changes, use a universal indicator to detect, the color of the indicator is not uniform, It shows that the reaction is only carried out locally, no uniform product is formed, and the test fails.

[0023] The experimental results show that if the water content of alginic acid is lower than 50%, the reaction between calcium carbonate and alginic acid is not complete, and the reaction only occurs on the surface of alginic acid, which also hinders the subsequent neutralization reaction of sodium carbonate, and the fiber state partly occurs after neutralization. The neutrali...

Embodiment 2

[0025] Soak non-deteriorated dry macroalgae at 30°C for 10 hours, wash, add soda ash with 24% dry macroalgae mass, heat and digest at 50°C for 8 hours, extract alginic acid, squeeze until the water content of alginic acid is 80%, and crush , weigh 10kg of alginic acid in a solid-phase neutralizer, stir, add 58.8g of solid calcium carbonate to react for 20 minutes, add sodium carbonate to neutralize, the material is too viscous, and agglomeration occurs, even if the stirring time is prolonged, it cannot Stir it away and the test fails.

[0026] The experimental results show that if the water content of alginic acid is higher than 75%, after being neutralized by sodium carbonate, the material will become sticky and agglomerate, and it cannot be stirred for a long time.

Embodiment 3

[0028] Soak non-deteriorated dry macroalgae at 30°C for 10 hours, wash, add soda ash with 20% mass of dry macroalgae, heat and digest at 48°C for 7 hours, extract alginic acid, squeeze until the water content of alginic acid is 72%, and crush , weigh 10kg of alginic acid in a solid-phase neutralizer, stir, add 95g of solid calcium carbonate to react for 20 minutes, then add sodium carbonate to neutralize, and detect with a universal indicator. It is uniform grass green, dried, and crushed for 1 The % viscosity is 2500cps; the acid block is directly neutralized with sodium carbonate, dried, and the 1% viscosity after crushing is 1200cps.

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Abstract

The invention provides a preparation method of high-viscosity alginate. The method comprises steps that: brown algae is digested, and alginic acid is extracted; the alginic acid is dehydrated until a mass percentage of water content in the alginic acid is 50-75%; the alginic acid is crushed; the crushed alginic acid is added to a neutralization reactor; 0.5-3% of calcium carbonate is added to thereactor, and the mixture is subject to a reaction for 10-20min; alkali is added to the alginic acid after the reaction, and neutralization is continued, until the alginic acid is completely convertedinto alginate; the alginate is dried, such that the high-viscosity alginate is prepared. With the solid-phase method provided by the invention, compared with alginate prepared by using a traditional method, the viscosity of the prepared high-viscosity alginate can be improved from 1500cps to 2500-4000cps. The technology of the method is simple. The method can be realized with a traditional solid-phase production condition, and no additional equipment is required.

Description

technical field [0001] The invention relates to a preparation method of high-viscosity alginate. Background technique [0002] Alginate is an important natural polysaccharide extracted from kelp, sargassum, giant algae, and Ascophyllum nodosum. It is widely used in food, medical and health, daily chemical, textile printing and dyeing, biotechnology, and wastewater treatment industries due to its unique properties. Widely used, in the food industry, alginate is not only a safe food additive, but also can be used as a base material for bionic food or curative food, which is useful for the prevention of colon cancer, cardiovascular and cerebrovascular diseases, obesity and lead, cadmium, etc. The accumulation in the body has an auxiliary therapeutic effect. In the medical and health field, the three-dimensional porous sponge prepared by using sodium alginate can replace damaged tissues and organs and be used as a matrix for cell or tissue transplantation. [0003] With the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/04
Inventor 安丰欣刘俊霞徐宗芹续元红申胜标王磊王超
Owner 连云港隆源海藻有限公司
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