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Novel method for producing carragheen

A new method, the technology of carrageenan, is applied in the field of extracting carrageenan from seaweed, which can solve the problems of limiting the concentration of sodium hydroxide and processing temperature, reducing the yield of carrageenan, and long alkali modification time, etc., and achieves good industrial production application Value, shorten modification time, reduce the effect of colloid loss

Inactive Publication Date: 2003-10-22
MAOMING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong damage of sodium hydroxide to algae, it is easy to cause the loss of colloid and reduce the yield of carrageenan
Therefore, the concentration of sodium hydroxide and the treatment temperature are limited, resulting in too long alkali modification time, prolonging the production cycle and increasing production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 400ml of deionized water into a reactor with a volume of 500ml, accurately weigh 20g of potassium hydroxide and 0.4g of potassium borohydride, put them into the reactor together, turn on the power and raise the temperature to 50°C. Slowly pour 20 g of Eucheuma accurately weighed into the reactor, close the reactor, adjust the stirring speed to 60 rpm, and program the temperature at 50°C for 1 hour. Open the reaction kettle, filter out the algae, recover the lye, and rinse the algae with deionized water until the pH value of the washing water is 7. After cooking, refining, salting out, dehydration, drying and crushing, the final product is white carrageenan powder.

[0013] The result is as follows:

[0014] Product: 7 grams;

[0015] Yield: 35%

[0016] Gel strength: 800g / cm 3

[0017] The rest of the quality indicators are in line with the FAO / QHO (1984) standard.

Embodiment 2

[0019] Add 400ml of deionized water to a reactor with a volume of 500ml, accurately weigh 40g of potassium hydroxide and 2g of potassium borohydride, add them to the reactor, and turn on the power to raise the temperature to 80°C. Slowly pour 20 g of Eucheuma accurately weighed into the reactor, close the reactor, adjust the stirring speed to 60 rpm, and program the temperature at 80°C for 2 hours. Open the reaction kettle, filter out the algae, recover the lye, and rinse the algae with deionized water until the pH value of the washing water is 7.5. After cooking, refining, salting out, dehydration and drying, the final product is white carrageenan powder.

[0020] The result is as follows:

[0021] Product: 5 grams;

[0022] Yield: 25%

[0023] Gel strength: 1500g / cm 3

[0024] The rest of the quality indicators are in line with the FAO / QHO (1984) standard.

Embodiment 3

[0026] Add 400ml of deionized water into a reactor with a volume of 500ml, accurately weigh 80g of potassium hydroxide and 1g of potassium borohydride, add them to the reactor together, turn on the power and raise the temperature to 65°C. Slowly pour 20 g of Eucheuma accurately weighed into the reactor, close the reactor, adjust the stirring speed to 60 rpm, and program the temperature at 65°C for 3 hours. Open the reaction kettle, filter out the algae, recover the lye, and rinse the algae with deionized water until the pH value of the washing water is 8. After cooking, refining, salting out, dehydration and drying, the final product is white carrageenan powder.

[0027] The result is as follows:

[0028] Product: 5.5 grams;

[0029] Yield: 27.5%

[0030] Gel strength: 1200g / cm 3

[0031] The rest of the quality indicators are in line with the FAO / QHO (1984) standard.

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PUM

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Abstract

The production method of carragheen uses marine alga as raw material and includes the following steps: alkalu modification procedure treatment, cooking, rfiniting, salting out, dewatering and drying so as to obtain the invented finished product. The alkali modification procedure adopts the potassium hydroxide as modification agent, and uses pure water to prepare the potassium hydroxide into the potassium hydroxide solution, its concentration is 5-25%, and the potassium borohydride is added, and its added amount is 1-5% of potassium hydroxide. Said invention raises the gel strength and recovery rate of the prdoucts and can shorten production period and reduce its production cost.

Description

technical field [0001] The invention relates to a method for extracting natural colloids, in particular to a new production method for extracting carrageenan from seaweed. Background technique [0002] Carrageenan, also known as carrageenan and carrageenan, is a type of seaweed polysaccharide extracted from marine red algae. Its chemical structure is a linear polysaccharide composed of D-galactose and 3.6-anhydro-D-galactose residues The compound, with ester sulfate group in the residue, is widely present in seaweed such as carrageen, Eucheuma, firella, sand dish, etc., because of its gel and water retention, thickening and suspending properties, and It has excellent properties such as protein binding, and is widely used in food, chemical and pharmaceutical industries. [0003] Carrageenan can be roughly divided into three types: k, l, and λ, which are derived from different seaweeds and have different uses. The production process of extracting carrageenan from seaweed gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/06
Inventor 李春海蔡德泉
Owner MAOMING COLLEGE
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