Preparation method of instant agar

A kind of agar, instant technology, applied in the field of preparation of instant agar, to achieve the effect of less investment, low cost and simple preparation process

Inactive Publication Date: 2015-12-23
THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing instant agar, aiming to solve the problem that ordinary agar in the existing instant agar preparation method can only be dissolved in hot water above 95°C

Method used

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  • Preparation method of instant agar

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preparation example Construction

[0038] Such as figure 1 Shown, the preparation method of the instant agar of the embodiment of the present invention may further comprise the steps:

[0039] S101: In the reaction kettle, add 1000kg of water and 10-30kg of agar, heat up to 95-100°C, keep stirring for 10-30min;

[0040] S102: Cool the agar solution to 60-90°C, add a solution of 1-5kg of food-grade acid dissolved in 5-25kg of water, and keep stirring for 1-4h; the solution with agar cooling liquid is 6-30kg;

[0041] S103: Cool the reaction solution to 50-60°C, slowly add 2500-3500L of precipitant under stirring;

[0042] S104: Filter the precipitated reaction solution, wash the precipitate with ethanol 2-3 times, and dry it with hot air below 70°C;

[0043] S105: crush and sieve to obtain instant agar.

[0044] The food-grade acid refers to one or more of phosphoric acid, acetic acid, citric acid, malic acid, and tartaric acid.

[0045] The precipitating agent refers to one or more of ethanol, isopropanol a...

Embodiment 1

[0048] 1) In a 2000L reactor, add 1000kg of water and 10kg of agar, heat up to 100°C, keep stirring for 10min;

[0049] (2) The agar solution is cooled to 60° C., and a solution of 1 kg of food-grade citric acid dissolved in 5 kg of water is added. Insulated and stirred for 4h;

[0050] (3) Cool the reaction solution to 50°C, slowly add 3000L of ethanol under stirring, and a white precipitate is precipitated;

[0051] (4) Centrifuge and filter the precipitated reaction solution with a centrifuge, wash the white precipitate twice with 20L ethanol, and dry it with hot air at 50°C;

[0052] (5) Pulverize and sieve to obtain agar that is instantly soluble in hot water at 80°C.

Embodiment 2

[0054] (1) In a 2000L reactor, add 1000kg of water and 20kg of agar, heat up to 100°C, keep stirring for 20min;

[0055] (2) Cool the agar solution to 70° C., add a solution of 2 kg of food-grade malic acid dissolved in 10 kg of water. Insulated and stirred for 3h;

[0056] (3) Cool the reaction solution to 50°C, slowly add 3500L of ethanol under stirring, and a white precipitate is precipitated;

[0057] (4) Filter the precipitated reaction solution with a centrifuge, wash the precipitate twice with 30L ethanol, and dry it with hot air at 60°C;

[0058] (5) Grinding and sieving to obtain agar that is instantly soluble in hot water at 75°C.

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Abstract

The invention discloses a preparation method of instant agar. The preparation method comprises: sequentially adding water and agar to a reaction kettle, stirring, and heating until full dissolution; cooling the agar solution to a certain temperature, then adding food-grade acid, insulating heat and stirring for a period of time; cooling a reaction liquid to a certain temperature, and slowly adding a precipitating agent under stirring; filtering a precipitated reaction liquid, washing precipitate with ethanol for 2-3 times, and drying in hot air; and crushing and screening to obtain the instant agar. According to the preparation method, an innovated process is used for modifying the agar to obtain agar capable of being quickly dissolved in hot water of 70-80 DEG C, the problem that common agar can only be dissolved in hot water of more than or equal to 95 DEG C is solved, and great convenience is provided for application of agar in the production fields of foods, medicines, chemical industry and the like.

Description

technical field [0001] The invention belongs to the technical field of seaweed chemistry, in particular to a preparation method of instant agar. Background technique [0002] Agar, scientific name agar gum, is a kind of plant gum, and is a polysaccharide extracted from algae, Eucheuma, Gracilaria, etc. It is insoluble in cold water and soluble in hot water. It is one of the most widely used alginate in the world. Its characteristics: it has the physical and chemical properties of coagulation, stability, and the ability to form complexes with some substances. It can be used as a thickener, coagulant, suspending agent, emulsifier, preservative and stabilizer. It is widely used in food industry, pharmaceutical industry, daily chemical industry, bioengineering and many other aspects. Agar gel can only be completely dissolved at 95°C for 10-15 minutes, and the solution is cloudy and opaque. High temperature and long time are required for heating and dissolving, which has becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/12
Inventor 唐旭徐长安陈锋黄仕新刘源森林凌郑维兵
Owner THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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