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Preparation method for alginate with ultra-low viscosity

An alginate and ultra-low viscosity technology, applied in the field of alginate processing, can solve the problems of irradiation limitation, residual odor of oxidant, poor viscosity stability, etc., to improve material properties, avoid material stickiness, and improve application effect. Effect

Active Publication Date: 2017-05-31
QINGDAO BRIGHT MOON SEAWEED GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention relates to a preparation method of ultra-low viscosity alginate, which can solve the problems of poor product viscosity stability, residual oxidant smell and radiation limitation existing in hydrogen peroxide degradation or radiation degradation technology; the application effect of the product is improved, and it is suitable for Industrial production application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] The first embodiment uses the alcohol aqueous solution as a solvent, and reacts the alginic acid and the liquid alkali in a liquid environment. The mass ratio of the alcohol aqueous solution to the alginic acid is 1-3:1, and the volume concentration of the alcohol in the alcohol aqueous solution is 60-80%.

[0032]The second embodiment is that a small amount of pure alcohol is added to the cooled alginic acid and mixed to keep the alginic acid in a semi-dry state. Under stirring conditions, the semi-dry alginic acid reacts with a solid base to obtain alginate. The amount of pure alcohol added is 1-15% of the mass of alginic acid. When it is lower than 1%, it has no obvious effect on avoiding stickiness of the material. When it is higher than 15%, the semi-dry state of alginic acid is destroyed.

[0033] In order to improve the yield of ultra-low viscosity sodium alginate, Embodiment 2 is preferably adopted. When the second embodiment is adopted, the water content of the...

Embodiment 1

[0035] The ultra-low viscosity alginate was prepared as follows:

[0036] 1. Take the food-grade sodium alginate intermediate alginic acid, press it with a high-pressure screw dehydrator until the water content is 62%, and pulverize;

[0037] 2. Pour 400kg of alginic acid into the reactor, start stirring and induce air, the temperature of the reaction tank will be raised to 65 ℃ in 20 minutes, and the temperature will be kept at 60-65 ℃ for 3 hours, and the water content of alginic acid will be reduced to 50%;

[0038] 3. Cool the material to below 40℃, add 10kg of pure alcohol and mix well;

[0039] 4. Add 36kg of solid sodium carbonate, stir and neutralize for 20min;

[0040] 5. Granulate and dry to obtain sodium alginate with a mass concentration of 10% and a viscosity of 400mpa.s.

[0041] There is no loss of the product in Example 1; it is placed at room temperature for 6 months, and the viscosity drops by <5%, indicating that the product has good viscosity stability; a...

Embodiment 2

[0043] The ultra-low viscosity alginate was prepared as follows:

[0044] 1. Take the food-grade sodium alginate intermediate alginic acid, use a high-pressure screw dehydrator to squeeze and dehydrate to a moisture content of 62%, and pulverize;

[0045] 2. Pour 400kg of alginic acid into the reactor, start stirring, induce air, add 1L of hydrogen peroxide, heat the reaction tank to 65°C for 20 minutes, keep the temperature at 60-65°C for 3 hours, and reduce the alginic acid moisture to 49%;

[0046] 3. The material is cooled to below 40℃, and 8kg pure alcohol mixture is added;

[0047] 4. Add 36kg of sodium carbonate, stir and neutralize for 20min;

[0048] 5. Granulation and drying to obtain sodium alginate with a mass concentration of 10% and a viscosity of 400mpa.s.

[0049] There is no loss of product in Example 2; the obtained sodium alginate appearance whiteness is better than Example 1, because hydrogen peroxide plays a bleaching effect, because the amount of hydrog...

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Abstract

The invention discloses a preparation method for alginate with ultra-low viscosity. The preparation method includes the steps that 1, brown seaweed, as a raw material, is soaked, fixed, washed, digested, diluted, filtered, floated, and subjected to refined filtration to obtain colloidal fluid; then through calcification or acidification, decalcification and dehydration, alginic acid is obtained and then smashed; 2, the alginic acid is degraded through heating, and low-boiling-point substances obtained through steaming are discharged, and during heating, the alginic acid is stirred continuously; 3, the degraded alginic acid is cooled, alcohol is added for uniform stirring, neutralizing is carried out with alkali, and the alginate with ultra-low viscosity is obtained after drying and smashing. The problems that in an existing hydrogen peroxide degrading or irradiation degrading technology, the stability of product viscosity is low, the smell of an oxidizing agent remains, and irradiation is limited are solved; the application effect of the product is improved, and the alginate is suitable for industrialized production and application.

Description

technical field [0001] The invention belongs to the technical field of alginate processing, and in particular relates to a preparation method of an ultra-low viscosity alginate. Background technique [0002] Sodium alginate is a natural polymer material extracted from brown algae and is widely used in the fields of medicine, food, chemical industry and agriculture. Ultra-low viscosity sodium alginate is usually prepared into a 10% mass concentration solution of 100-200, 300-700, 5000-10000mpa.s and other commercial specifications for application, and the annual market demand is estimated to be 1,000 tons. Sodium alginate has the characteristics of instant water solubility after ultra-low viscosity. The viscosity of 1% solution is close to that of water. It is generally dissolved in high concentration form and used in liquid gastric medicines, beverages, and film-forming materials. Good stability, low water-insoluble content, etc. [0003] The alginate extraction process is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04
CPCC08B37/0084
Inventor 王超赵丽丽窦有涛徐泽斌顾侨侨
Owner QINGDAO BRIGHT MOON SEAWEED GROUP
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