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Method for preparing Iota-carrageenan

A carrageenan and gel extraction technology, which is applied in the field of marine engineering, can solve problems such as low gel strength, low gel yield, and serious sol, and achieve the effects of reducing water consumption, increasing yield, and weakening adhesion

Active Publication Date: 2012-02-08
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The kappa-type gel extraction process is basically used, with only a small amount of improvement, resulting in severe sol, low gel yield, and low gel strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Using Philippine marine red alga Eucheuma spinosum (Eucheuma Spinosum) as raw material, heat the prepared 7% potassium hydroxide solution to 70 degrees, add raw algae at a solid-to-liquid ratio of 1:10, and react at constant temperature for 1 hour , filter through a 300-mesh sieve, take out the algae and drain the lye, then soak in 0.5M / L hydrochloric acid solution, adjust the pH to 7-8, then soak in water twice, 1 hour each time, take out the algae and drain. Place the drained algae in a microwave oven with a microwave power of 450w and a reaction time of 10 minutes. Put the algae after microwave treatment into water 20-30 times the weight of the algae, and add potassium pyrophosphate with a volume and mass ratio of 0.05% in the water as a gel extraction aid, the gel extraction temperature is 100 degrees, and the gel extraction time is 60 minutes. After extracting the gel, filter it through a 300-mesh sieve while it is still hot, place the glue on a plate, and place it...

Embodiment 2

[0022] Using Eucheuma spinosa as raw material, heat the prepared 7% potassium hydroxide solution by mass to 50 degrees, add raw algae at a solid-to-liquid ratio of 1:10, react at constant temperature for 4 hours, filter through a 300-mesh screen, and take out Algae drain the lye. Then soak in 0.5M / L hydrochloric acid solution, adjust the pH to 7-8, then soak in water twice, 1 hour each time, take out the algae and drain. Place the drained algae in a microwave oven with a microwave power of 180w and a reaction time of 20min. The algae after microwave treatment are put into water 20-30 times the weight of the algae, and 0.01% potassium pyrophosphate is added as a gel extraction aid, the gel extraction temperature is 100 degrees, and the gel extraction time is 60 minutes. After extracting the gel, filter it through a 300-mesh sieve while it is still hot, put the glue on a plate, and place it in the refrigerator at -18°C for 24 hours after cooling, thaw and dehydrate with low-tem...

Embodiment 3

[0025] Using Eucheuma spinosa as raw material, heat the prepared 3% potassium hydroxide solution to 70 degrees by mass, add raw algae at a solid-to-liquid ratio of 1:10, react at constant temperature for 4 hours, filter through a 300-mesh sieve, and take out Algae drain the lye. Then soak in 0.1M / L hydrochloric acid solution, adjust the pH to 7-8, then soak in water twice, each time for 1 hour, take out the algae and drain. Place the drained algae in a microwave oven with a microwave power of 300w and a reaction time of 15 minutes. The algae after microwave treatment are put into water 20-30 times the weight of the algae, and 0.1% potassium pyrophosphate is added as a gel extraction aid, the gel extraction temperature is 100 degrees, and the gel extraction time is 45 minutes. After extracting the gel, filter it through a 300-mesh sieve while it is still hot, put the glue on a plate, and place it in the refrigerator at -18°C for 24 hours after cooling, thaw and dehydrate with ...

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Abstract

The invention relates to a method for preparing Iota-carrageenan. The method comprises the following steps of: performing alkali modification on a raw material in 3-7 percent by mass percent of potassium hydroxide; neutralizing the modified raw material in a diluted acid solution till the pH is 7-8; washing the modified raw material liquid with water after neutralizing; performing microwave radiation treatment with the microwave radiation power of 180-450W for 5-20 minutes; boiling with water at high temperature for extracting colloid; and adding 0.01-0.1 percent of potassium permangenate aidduring colloid extraction to obtain high-yield and high-jel-strength Iota-carrageenan. Due to the adoption of potassium hydroxide, the loss of colloid during alkali treatment can be reduced; the diluted acid is used for neutralizing, so that the water amount is greatly reduced; microwave radiation treatment is performed, and an aid is added for extracting colloid, so that the colloid can be dissolved out more easily, and the gel strength is increased; and the method has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of marine engineering, in particular to a preparation method of Iota-carrageenan. Background technique [0002] Carrageenan (also known as carrageenan or staghorn alginate) is a natural polymer hydrophilic polysaccharide extracted from marine red algae. Its chemical structure is a linear polysaccharide compound composed of D-galactose and 3,6-anhydro-D-galactose residues. Different sources have different fine structures, and their colloidal properties are also different. The named ones are kappa (Kappa), iota (Aota), lambda (Lambda), mu (Miao), nu (New Zealand) , theta (setta), xi (west) type carrageenan, etc., but the commercial production is mainly the first three types, the largest output is kappa type, and the output of Iota type and Lambda type is small. [0003] Carrageenan is widely used in food, medicine, daily chemicals, biochemistry, architectural coatings, textile printing and dyeing, and food. ...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 刘松李鹏程邢荣娥李荣锋李克成冯金华于华华
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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