Method for extracting carrageenan

A carrageenan and gel technology, applied in the field of extracting carrageenan, can solve the problems of long consumption time, high cost, affecting product safety, etc., and achieve the effects of improving yield, high product strength, and shortening alkali treatment time.

Active Publication Date: 2014-02-12
GREENFRESH FUJIAN FOODSTRUFF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two methods consume longer time or higher cost
Eucheuma is easy to accumulate heavy metals when it grows in seawater. At present, there is no effective control method for the removal of heavy metals in the extraction process of Eucheuma carrageenan, which affects the safety of the product.

Method used

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  • Method for extracting carrageenan

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Effect test

Embodiment 1

[0027] A method for extracting carrageenan, using Eucheuma as raw material, washing with water, treatment with compound alkali with decreasing concentration, compound enzyme treatment, metal chelating agent to remove heavy metals, boiling gum, coarse filtration, fine filtration, cooling, gelling, dehydration, cutting strips, dried, crushed, and sieved to obtain carrageenan.

[0028] A method for extracting carrageenan, comprising the steps of:

[0029] (1) Washing: Weigh 50g Eucheuma, wash with 1000g water;

[0030] (2) Compound alkali treatment with decreasing concentration: Add 1000g of compound solution with mass concentration of 5%NaOH, 5%KOH and 3%KCl to the Eucheuma obtained in step (1), treat at 75°C for 75min, wash with water Rinse until the pH value is 7; then add 1000 g of a compound solution with a mass concentration of 4% NaOH, 3% KOH and 3% KCl, treat at 75°C for 30 minutes, and rinse with water until the pH value is 7; finally add a mass concentration of 1000g ...

Embodiment 2

[0037] A method for extracting carrageenan, using Eucheuma as raw material, washing with water, treatment with compound alkali with decreasing concentration, compound enzyme treatment, metal chelating agent to remove heavy metals, boiling gum, coarse filtration, fine filtration, cooling, gelling, dehydration, cutting strips, dried, crushed, and sieved to obtain carrageenan.

[0038] A method for extracting carrageenan, comprising the steps of:

[0039] (1) Washing: Weigh 50g of Eucheuma, wash with 2000g of water;

[0040] (2) Treatment with compound alkali with decreasing concentration: Add 2000g of compound solution with a mass concentration of 5%NaOH, 5%KOH and 3%KCl to the Eucheuma obtained in step (1), treat at 75°C for 75min, wash with water After rinsing until the pH value is 7.5, pour out the treatment solution; then add 2000g of a compound solution with a mass concentration of 4%NaOH, 3%KOH and 3%KCl, treat at 75°C for 30min, and rinse with water until the pH value is...

Embodiment 3

[0047] A method for extracting carrageenan, using Eucheuma as raw material, washing with water, treatment with compound alkali with decreasing concentration, compound enzyme treatment, metal chelating agent to remove heavy metals, boiling gum, coarse filtration, fine filtration, cooling, gelling, dehydration, cutting strips, dried, crushed, and sieved to obtain carrageenan.

[0048] A method for extracting carrageenan, comprising the steps of:

[0049] (1) Washing: Weigh 50g of Eucheuma, wash with 1500g of water;

[0050] (2) Compound alkali treatment with decreasing concentration: Add 1500 g of compound solution with a mass concentration of 5% NaOH, 5% KOH and 3% KCl to the Eucheuma obtained in step (1), treat at 75°C for 75 minutes, wash with water After rinsing until the pH value is 8, pour out the treatment solution; then add 1500 g of a compound solution with a mass concentration of 4% NaOH, 3% KOH and 3% KCl, treat at 75°C for 30 minutes, and rinse with water until the ...

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Abstract

The invention discloses a method for extracting carrageenan, which comprises the following steps: washing a raw material with water, performing combined alkali treatment on the raw material, wherein the concentration of alkali is decreased gradually, washing the raw material to enable the pH to be 7-8; carrying out composite enzyme treatment, removing heavy metals by using a metal chelating agent, boiling carrageenan, filtering coarsely, filtering finely, reducing temperature, gelling, dewatering, cutting into strips, drying, crushing and screening so as to obtain the carrageenan. According to the invention, a mixed solution of NaOH, KOH and LCI with gradually decreased concentration in three grades is adopted in an alkali treatment process, the loss of carrageenan is reduced effectively while the alkali treatment time is reduced; cellulase and protease combined treatment is adopted, and the yield of the carrageenan is improved while the high gel strength of the carrageenan is ensured; ethylene diamine tetraacetic acid and nopotassium phosphate are adopted for further treatment for the raw material, and the heavy metals in the raw materials are removed effectively. The gel strength of the carrageenan prepared by the method is greater than or equal to 2139.2 g / cm<2>, the extraction rate is greater than or equal to 23.9 percent, Pb is less than or equal to 2.5 mg / kg, As is less than or equal to 1.0 mg / kg, Hg is less than or equal to 0.5 mg / kg, and the Cd is less than or equal to 1.0 mg / kg.

Description

technical field [0001] The invention belongs to the technical field of seaweed product processing, and in particular relates to a method for extracting carrageenan. Background technique [0002] Carrageenan, also known as carrageenan, carrageenan, and Irish carrageenan, is a polysaccharide extracted from marine red algae (including carrageenan, Eucheuma, genus Eucheuma, etc.) It has the characteristics of forming hydrophilic colloid, gel, thickening, emulsification, film, stable dispersion, etc., so it is widely used in dairy products, ice cream, fruit juice drinks, bread, hydrogel (fruit jelly), meat food , condiments, canned food, etc. [0003] At present, there are mainly two methods in the industrial production of carrageenan in my country. The first one is to use NaOH-KCl to modify and then extract. The gel strength of the product is low, generally 1000-1200g / cm 2 ; The second is to obtain higher strength carrageenan through the compound alkali treatment process, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00
Inventor 林坤城何殿国韩阿火洪清林
Owner GREENFRESH FUJIAN FOODSTRUFF
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