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Method for jointly preparing sodium alginate and kelp protein

A technology of sodium alginate and kelp protein, which is applied to the preparation method of peptides, chemical instruments and methods, organic chemistry, etc., can solve the problems of resource waste and low utilization rate, and achieve improved production efficiency, high production efficiency, and loss rate low effect

Inactive Publication Date: 2021-10-22
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for jointly preparing sodium alginate and laminarin from kelp to solve the problems of low utilization rate and serious waste of resources in the prior art

Method used

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  • Method for jointly preparing sodium alginate and kelp protein

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Comparison scheme
Effect test

Embodiment 1

[0041] (1) Pretreatment of raw materials

[0042] After cutting the dried kelp into pieces, soak it with water at a ratio of 1:15 (25g+375mL water) for about 40 minutes, which can initially remove some dust and sediment on the surface of the kelp. After soaking, wash twice with equal volume of water respectively.

[0043] (2) digestion

[0044] Mince the kelp (10mm), add 375mL of 1% Na to the kelp at a ratio of 1:15 2 CO 3 , under the condition of 60 ℃, digest kelp to extract alginate, the extraction time is generally 3 hours, and the rotor is stirred.

[0045] (3) filter

[0046] Dilute: The kelp will become sticky after digestion. In order to speed up the filtration, add 2L of water to 375mL kelp paste for diluting. The amount of diluting water is equivalent to 80 times that of dried kelp raw materials.

[0047] Fine filtration: First filter twice with four layers of gauze, and then use a vacuum pump for suction filtration.

[0048] The finely filtered glue solution co...

Embodiment 2

[0060] (1) Pretreatment of raw materials

[0061] After cutting the dried kelp into pieces, soak it with water at a ratio of 1:15 (25g kelp, 375mL water) for about 40 minutes, which can initially remove some dust and sediment on the surface of the kelp. After soaking, wash twice with equal volume of water respectively.

[0062] (2) digestion

[0063] Mince the kelp (10mm), add 375mL of 1% Na to the kelp at a ratio of 1:15 2 CO 3 , under the condition of 60 ℃, digest kelp to extract alginate, the extraction time is generally 3 hours, and the rotor is stirred.

[0064] (3) filter

[0065] Dilute: Kelp will become sticky after digestion. In order to speed up the filtration, add 2L of water to 375mL kelp paste to dilute. The amount of dilute water is equivalent to 80 times that of dried kelp raw materials.

[0066] Fine filtration: First filter twice with four layers of gauze, and then use a vacuum pump for suction filtration.

[0067] The finely filtered glue solution conta...

Embodiment 3

[0079] (1) Pretreatment of raw materials

[0080] After cutting the dried kelp into pieces, soak it with water at a ratio of 1:15 (25g of dried kelp to 375mL of water) for about 40 minutes, which can initially remove some dust and sand on the surface of the kelp. After soaking, wash twice with equal volume of water respectively.

[0081] (2) digestion

[0082] Mince the kelp (10mm), add 375mL of 1% Na to the kelp at a ratio of 1:15 2 CO 3 Concentration, digest kelp to extract alginate under the condition of 60°C, the extraction time is generally 3 hours, and the rotor is stirred.

[0083] (3) filter

[0084] Dilute: Kelp will become sticky after digestion. In order to speed up the filtration, add 2L of water to 375mL kelp paste to dilute. The amount of dilute water is equivalent to 80 times that of dried kelp raw materials.

[0085] Fine filtration: First filter twice with four layers of gauze, and then use a vacuum pump for suction filtration.

[0086] The finely filter...

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Abstract

The invention provides a method for jointly preparing sodium alginate and kelp protein. The method comprises the following steps: S1, adding Na2CO3 with a concentration of 1%, and digesting kelp into kelp paste; S2, filtering out algin; S3, adding concentrated hydrochloric acid with a concentration of 10% for acid coagulation so as to obtain acidified alginic acid gel; S4, conducting dehydrating until a water content is 65-70%; S5, mixing the dehydrated acidified alginic acid gel with 90% ethanol according to a ratio of 1: 1, and adjusting a pH value to 8; S6, filtering out the ethanol, and conducting drying at 60-80 DEG C to obtain a sodium alginate solid; and S7, centrifuging an acid condensate obtained in the step S4 under the condition that a pH value is 4-12 to obtain the kelp protein. The problems of low utilization rate and resource waste in the prior art are solved, the sodium alginate and seaweed protein are co-produced, so production benefits are higher, industrial production steps are optimized, production efficiency is improved, and the method is simple in equipment, low in energy consumption and easy to implement.

Description

technical field [0001] The invention relates to the technical field of food, in particular to a method for jointly preparing sodium alginate and laminarin from kelp. Background technique [0002] Bioactive peptides and amino acids can be used as candidates for small molecule drugs, which have great advantages in terms of high bioavailability and biospecificity of traditional drugs. The biological functions of proteins and peptides of seaweed have great potential in the preparation of preparations, medicines and functional foods, and seaweed has long been identified as a good source for extracting proteins and their derivatives with strong functional biological activities. [0003] At present, in addition to simple processing or direct consumption, seaweed is mainly used for the extraction of sodium alginate. Sodium alginate has good thickening properties, film-forming properties, stability, and flocculation properties, and is widely used in food, textile, and medicine. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04C07K1/30
CPCC08B37/0084C08B37/0003C07K1/30
Inventor 高星辰沈宇晴张雨霏王璇琪钟旭张婷婷
Owner DALIAN POLYTECHNIC UNIVERSITY