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Producing method of sodium alginate with ultralow viscosity

A technology of sodium alginate and a production method, applied in the field of deep processing of marine resources, can solve the problems of slow degradation speed, complicated operation, large water consumption and the like, and achieve the effects of fast degradation speed, simple process and less water consumption

Inactive Publication Date: 2014-03-26
青岛福创环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultra-low-viscosity and low-viscosity alginate occupies an important position in the world's alginate, and its demand accounts for 30-40% of the total demand. It has a large market in Germany, the United States, Japan, South Korea and China, but due to the lack of domestic production , has been blank for many years
[0004] At present, dilute acid hydrolysis is commonly used in the production of low-viscosity sodium alginate, but this method has a slow degradation rate, requires high temperature and high pressure, and is complicated to operate. At the same time, post-treatment consumes a lot of water, resulting in a large amount of sewage discharge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of production method of ultra-low viscosity sodium alginate, its concrete steps are as follows:

[0019] 1. Kelp pretreatment: cut the dried kelp to 1 cm, then add water 8 times the weight of the dried kelp, soak in a water bath at 40°C for 2 hours, so that the kelp can fully absorb water and expand, and then homogenize the soaked kelp with a homogenizer pulp;

[0020] 2. Enzymolysis: adjust the pH of the kelp homogenate obtained in step 1 to 2 with dilute hydrochloric acid, add 0.1% cellulase, and place it in a water bath at 50°C for 2 h; then adjust the pH to 6, and add 0.01% protease and 0.01% pectinase, and hydrolyze it in a water bath at 50°C for 1 h; after the end of the enzymolysis, raise the temperature to 90°C for inactivation treatment;

[0021] 3. Extraction of sodium alginate: add 8 times the weight of 0.5% Na to the enzyme-treated kelp residue 2 CO 3 Digest the solution in a water bath at 50°C for 0.5 h; after the digestion, add 2 times of purifie...

Embodiment 2

[0024] A kind of production method of ultra-low viscosity sodium alginate, its concrete steps are as follows:

[0025] 1. Kelp pretreatment: cut the dried kelp to 3 cm, then add water 10 times the weight of the dried kelp, soak in a water bath at 70°C for 5 hours, so that the kelp can fully absorb water and expand, and then homogenize the soaked kelp with a homogenizer pulp;

[0026] 2. Enzyme hydrolysis: adjust the pH of the kelp homogenate obtained in step 1 to 6 with dilute hydrochloric acid, add 1% cellulase, and place it in a water bath at 55°C for 10 h; then adjust the pH to 9, and add 0.5% protease and 0.2% pectinase for 5 h in a water bath at 55°C; after the end of the enzymolysis, heat up to 90°C for inactivation treatment;

[0027] 3. Extraction of sodium alginate: add 10 times the weight of 1.5% Na to the enzyme-treated kelp residue 2 CO 3 The solution was digested in a water bath at 60°C for 3 h; after the digestion, it was diluted with 6 times of purified water...

Embodiment 3

[0030] Cut 50 g of dried kelp into pieces, add 400 mL of water, soak in a water bath at 60°C for 4 h, then beat the soaked kelp into a homogenate; adjust the pH of the kelp homogenate to 4.0 with dilute hydrochloric acid, add 200 mg of cellulase , placed in a 50°C water bath for 5 h; then adjust the pH to 8, add 100 mg protease and 25 mg pectinase, and enzymolyze in a 50°C water bath for 2 h; after the enzymatic hydrolysis, raise the temperature to 90°C to kill Enzyme activity treatment, filter and separate the filtrate and filter residue, wash the filter residue twice with twice the volume of water; add 450 mL of 1% Na2CO3 solution to the filter residue, digest in a water bath at 60 °C for 3 h; after digestion, add 2 times of Dilute with purified water, filter to obtain sodium alginate solution, and then bleach with 1% hydrogen peroxide at 50°C for 1 h; slowly add 50 mL of 10% calcium chloride solution to the bleached sodium alginate clear solution, and the alginate Sodium is...

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PUM

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Abstract

The invention discloses a producing method of sodium alginate with ultralow viscosity. Kelp is soaked and homogenized, cellulose, protease and pectinase are added for enzymolysis, enzymatic hydrolysate is filtered out, and kelp dregs are obtained; dilute alkali is added into the kelp dregs for digestive treatment, a digestive fluid is diluted and filtered, H2O2 is added into an obtained alginate liquid for oxidative decoloration, and the mixture is filtered; a calcium chloride solution is added into an alginate clear liquid, so that sodium alginate is converted into calcium alginate fiber to be precipitated out; after calcium alginate is dehydrated and washed, an HCl solution is added to convert calcium alginate into alginic acid, then, NaOH is added, and the mixture is converted into a sodium alginate solution; ethyl alcohol is added to precipitate out sodium alginate, sodium alginate is dried at the temperature of 50-60 DEG C, and a sodium alginate product with the viscosity to be 10-50 mpa*s is obtained. The process is simple, less water is consumed, the degradation velocity is high, and severe conditions of high temperature, high pressure and the like are not required.

Description

technical field [0001] The invention relates to a production method of ultra-low viscosity sodium alginate, which belongs to the field of deep processing of marine resources. Background technique [0002] As a natural polymer, sodium alginate is widely used in chemical, Biology, medicine, food and other fields. The output of sodium alginate in my country accounts for 40% of the world's total output, ranking first in the world. [0003] Ultra-low viscosity alginate generally refers to a type of product with a viscosity of 1-100 mpa.s. In recent years, remarkable achievements have been made in the use of low-viscosity sodium alginate as a binder, thickener, emulsifier, stabilizer, etc. in my country's pasta, bionic food, medicine, and beverages; Continuous adoption of new technologies and new equipment has increased the colors and varieties, so the higher the viscosity of alginate, the better. On the contrary, ultra-low viscosity alginate is increasingly active in the world...

Claims

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Application Information

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IPC IPC(8): C08B37/04
Inventor 任宪君张秋艳
Owner 青岛福创环境科技有限公司
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