A method for extracting nanocellulose from chlorella

By adding 2,2-dimethoxypropane to Chlorella powder to form a protecting group, the problem of easy destruction of the cellulose molecular structure of Chlorella under high concentration of strong alkali was solved, and high purity and high extraction rate of nanocellulose were prepared.

CN122406570APending Publication Date: 2026-07-17SHENZHEN HAISENTECH TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN HAISENTECH TECHNOLOGY CO LTD
Filing Date
2026-04-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, when treating Chlorella with sodium hydroxide, the molecular structure of cellulose is easily destroyed in a high-concentration, strongly alkaline environment, resulting in low purity and low extraction rate of nanocellulose.

Method used

By adding 2,2-dimethoxypropane to defatted Chlorella powder, the hydroxyl groups in the cellulose molecules undergo an acetalization reaction to form stable protective groups, preventing the degradation of cellulose under strong alkali. Nanocellulose is then extracted through a series of steps.

Benefits of technology

It effectively reduces the breakage and loss of cellulose molecular chains, improves the purity and extraction rate of nanocellulose, solves the problems of low purity and low extraction rate in traditional methods, and makes full use of the cellulose resources in Chlorella.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of Chlorella application technology, specifically relating to a method for extracting nanocellulose from Chlorella, comprising the following steps: S1, defatting dried Chlorella powder using the methanol-chloroform method; S2, adding anhydrous acetone to the defatted Chlorella powder, then adding 2,2-dimethoxypropane and p-toluenesulfonic acid to react, and centrifuging to collect the precipitate after the reaction, obtaining protected Chlorella cellulose; S3, deproteinizing with an alkali method; S4, adding an acetic acid aqueous solution to the deproteinized protected cellulose, centrifuging to collect the precipitate after the reaction, washing the precipitate to neutral and then dialyzing to obtain deprotected Chlorella cellulose; S5, bleaching and purification; S6, preparing Chlorella nanocellulose. This invention, by adding 2,2-dimethoxypropane to defatted Chlorella powder, forms a stable protecting group, preventing cellulose degradation under strong alkali, thereby reducing the breakage and loss of cellulose molecular chains.
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