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Method for preparing soluble kelp cellulose

A cellulose and soluble technology, which is applied in the field of preparation of soluble kelp cellulose, can solve the problems of uneven molecular weight of kelp cellulose, affecting the quality of kelp cellulose, and low kelp cellulose content, so as to reduce production energy consumption and be operable properties, uniform molecular weight, and high cellulose content

Active Publication Date: 2012-11-21
QINGDAO HENGSHENG BIOLOGICAL PHARMA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are known extraction techniques for extracting kelp cellulose from kelp and kelp residue, cellulase or protease is generally used for high-temperature enzymolysis at a temperature above 50°C. Molecules will also be degraded due to intense enzymatic hydrolysis conditions, resulting in low kelp cellulose content in the extract and low extraction yield, and the molecular weight of kelp cellulose is not uniform, which affects the quality of kelp cellulose

Method used

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  • Method for preparing soluble kelp cellulose
  • Method for preparing soluble kelp cellulose

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Extraction of kelp dietary fiber: add calcium chloride solution to the turbid glue of kelp slag until the kelp slag is completely flocculated, let the flocs stand still, add distilled water to the flocculations, add hydrochloric acid solution for decalcification, and then collect by centrifugation. Repeat the above decalcification step once, add an appropriate amount of sodium carbonate solution to the filtrate until neutral, collect the filtrate, add sodium hypochlorite with a mass concentration of 10% in the solution to bleach for 24 hours, suction filter, wash with water, and then rinse with 75wt% ethanol Suction filtration, vacuum freeze-drying and crushing at 50°C to obtain kelp dietary fiber.

[0034] Preparation of soluble kelp cellulose: add 2wt% NaOH solution to the kelp dietary fiber obtained in step (1) at a mass ratio of 1:20, soak at room temperature for 48 hours, wash with water until neutral, and add water at a ratio of 1:20 , under the conditions of 121°...

Embodiment 2

[0036]Extraction of kelp dietary fiber: add 8wt% calcium chloride solution to the turbid glue of kelp slag until the kelp slag is completely flocculated, let it stand for 1 hour, collect the flocs, add distilled water to the flocs at a weight ratio of 1:8 , and add 0.1mol / L HCl, heat and stir at 40°C for 0.6h, then collect by centrifugation, add an appropriate amount of sodium carbonate solution to the filtrate until neutral, collect the filtrate, add sodium hypochlorite with a mass concentration of 8% in the solution to bleach for 24 hours, suction filtration, washing with water, then washing with 70wt% ethanol, suction filtration, vacuum drying at 45°C, and pulverization to obtain kelp dietary fiber.

[0037] Preparation of soluble kelp cellulose: Add 1 wt% NaOH solution to the kelp dietary fiber obtained in step (1) at a mass ratio of 1:15, soak at room temperature for more than 48 hours and wash with water until neutral, then add water at a ratio of 1:20 , under the condit...

Embodiment 3

[0039] Extraction of kelp dietary fiber: add 12wt% calcium chloride solution to the turbid glue of kelp slag until the kelp slag is completely flocculated, let stand for 0.5h, collect the flocs, add Distilled water, and add 0.2mol / L HCl, heat and stir at 50°C for 0.5h, then collect by filtration, repeat the above decalcification step once, add an appropriate amount of sodium carbonate solution to the filtrate until it is neutral, collect the filtrate, add the mass in the solution Bleach with 12% sodium hypochlorite for 24 hours, suction filter, wash with water, then rinse with 80wt% ethanol, filter with suction, vacuum dry at 55°C, and pulverize to obtain kelp dietary fiber.

[0040] Preparation of soluble kelp cellulose: add 3wt% NaOH solution to the kelp dietary fiber obtained in step (1) at a mass ratio of 1:30, soak at room temperature for 48 hours, wash with water until neutral, and add water at a ratio of 1:30 , steam explosion at 121°C and 0.14MPa for 25 minutes to obta...

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Abstract

The invention discloses a method for preparing soluble kelp cellulose. The method includes the steps: firstly, preparing kelp dietary fibers from kelp residues by means of flocculation, decalcifying, bleaching, washing and the like; secondly, performing steam explosion to obtain insoluble kelp cellulose, then adding low-temperature cellulase into the insoluble kelp cellulose, and performing enzymolysis in water bath at the temperature of 25 DEG C-35 DEG C to obtain the soluble kelp cellulose with the content of 90.14+ / -1.09wt% and the yield of 50-60%. When the soluble kelp cellulose is prepared, the low-temperature cellulase is used, enzymolysis is performed at the normal temperature, enzymolysis conditions are moderate, only macromolecules are sensitive to the cellulose, and macromolecules in kelp are easily decomposed while micromolecules are relatively stable and not easily further decomposed, so that the obtained soluble kelp cellulose is uniform in molecular weight and high in yield, cellulose content, water-holding capacity and expansibility. Moreover, the enzymolysis temperature is low, so that production energy consumption and operability are reduced.

Description

technical field [0001] The invention relates to the technical field of reuse of kelp industrial waste, in particular to the preparation of soluble kelp cellulose. Background technique [0002] Kelp is a large-scale brown algae that is widely distributed along the coast of my country, but it is mainly produced in the coasts of Shandong and Liaoning provinces in my country. The output and scale of kelp planting in my country ranks first in the world. In 2009, the output of dry kelp in my country reached 6.0×10P 5P t, accounting for more than 50% of the world's total output. Kelp is rich in alginate, cellulose, hemicellulose, vitamins and minerals, etc. In addition to being used for direct consumption, kelp is one of the main raw materials for the brown algae industry. In my country, kelp processing has formed an industrial system with alginate, mannitol, and iodine as the main products. In recent years, due to fierce market competition, low added value of products, high wat...

Claims

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Application Information

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IPC IPC(8): D21C5/00A23L1/308
Inventor 缪锦来李友海李健
Owner QINGDAO HENGSHENG BIOLOGICAL PHARMA TECH DEV
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