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Process for extracting sodium alginate

A sodium alginate and extraction process technology, applied in the field of sodium alginate extraction process, can solve the problems of low product viscosity, environmental pollution, low extraction rate of production process, etc., and achieve good performance, high purity, and improved extraction rate.

Active Publication Date: 2015-04-29
HAINAN OPEARL BIOLOGICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for extracting sodium alginate from seaweed by using compound enzymes. The present invention overcomes the problems of low extraction rate, low product viscosity and environmental pollution caused by a large number of chemicals in the existing production process.

Method used

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  • Process for extracting sodium alginate

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Pretreatment process: Soak kelp in an appropriate amount of 0.5% V formaldehyde aqueous solution at 25°C for 1 hour, then filter and rinse the kelp with purified water until the filtrate is colorless, and monitor the conductivity of the filtrate to 20-30us / cm, stop washing, and then crushed to an area of ​​1 cm 2 ~2cm 2 Then add purified water of 4 times the weight of kelp to the fragments, and use a high-speed shear to shear the fragments at 800-1000 rpm to make the fragments into a slurry;

[0033] 2) Enzymolysis process: Add neutral cellulase, neutral protease, and alkaline pectinase to the slurry solution obtained in step 1, and then add 0.2Mol / L sodium dihydrogen phosphate with a volume ratio of 1:1 Mix the solution with 0.2Mol / L disodium hydrogen phosphate to control the pH of the system between 6 and 7, perform enzymatic hydrolysis at 18°C ​​for 2 hours, then control the temperature to 28°C, and adjust the pH with 0.2Mol / L sodium dihydrogen phosphate After ...

Embodiment 2

[0041] 1) Pretreatment process: Soak the brown algae in an appropriate amount of 0.5% V formaldehyde aqueous solution at 35°C for 2 hours, then filter and rinse the brown algae with purified water until the filtrate is colorless, and monitor the conductivity of the filtrate to 20-30us / cm, stop washing, and then crushed to an area of ​​1 cm 2 ~2cm 2 Then add purified water of 5 times the weight of kelp to the fragments, and use a high-speed shearing machine to cut the fragments at 800-1000rpm to make the fragments into a slurry;

[0042] 2) Enzymolysis process: Add neutral cellulase, neutral protease, and alkaline pectinase to the slurry solution obtained in step 1, and then add 0.2Mol / L sodium dihydrogen phosphate with a volume ratio of 1:1 Mix the solution with 0.2Mol / L disodium hydrogen phosphate to control the pH of the system between 6 and 7, perform enzymatic hydrolysis at 35°C for 3 hours, then control the temperature to 32°C, and adjust the pH with 0.2Mol / L sodium dih...

Embodiment 3

[0052] The sodium alginate in Example 1 and Example 2 was detected with reference to GB1976-80, wherein three samples were taken for each example, and the average value was taken. The test results are as follows:

[0053]

[0054] Note: CN 101979522 B represents sodium alginate extracted according to the teaching in CN 101979522 B.

[0055] GB1976-80 stipulates that the viscosity of sodium alginate / Pa.s is greater than 0.15. The samples prepared by the present invention and its CN 101979522 B all meet the requirements, but the prepared by the present invention has a higher viscosity and a higher extraction rate. And the comparative examples show that the addition of β-agarase can promote the extraction rate and viscosity of sodium alginate.

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Abstract

The invention discloses a process for extracting sodium alginate. The process comprises the following steps: performing enzyme treatment on kelp or brown seaweed by virtue of a complex enzyme, and extracting sodium alginate by virtue of a classic chemical method. The process comprises the following steps: performing pretreatment; performing enzymolysis; digesting; separating; performing acidification; and performing alkali dissolution and acidification. The extraction process disclosed by the invention is high in extraction rate, and the extracted sodium alginate is high in viscosity and has industrial application prospects.

Description

technical field [0001] The invention relates to an extraction process of sodium alginate, in particular to a process for extracting sodium alginate from brown algae or kelp by using a compound enzyme. Background technique [0002] Sodium alginate is a polysaccharide carbohydrate extracted from brown algae kelp or sargassum, which is composed of 1,4-poly-β-D-mannuronic acid and α-L-zanuronic acid. A linear polymer, one of alginic acid derivatives. Its molecular formula is (C6H7O6Na)n, and its relative molecular weight is around 32,000 to 200,000. [0003] Sodium alginate is widely used in chemistry, biology, medicine, food and other fields due to its good biodegradability and biocompatibility. At present, the methods of extracting sodium alginate in the world can be divided into four kinds of processes, namely: acid coagulation acidification method, calcium coagulation acidification method, calcium coagulation ion exchange method, and enzymatic extraction method. At present...

Claims

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Application Information

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IPC IPC(8): C08B37/04
Inventor 孔庆显周林
Owner HAINAN OPEARL BIOLOGICAL ENG
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