Unlock instant, AI-driven research and patent intelligence for your innovation.

Green process for extracting ultralow-viscosity low-M/G-value sodium alginate from kelp

A technology of sodium alginate and ultra-low viscosity, which is applied in the field of extracting sodium alginate with ultra-low viscosity and low M/G value, can solve the problems of high energy consumption, cost, environmental pollution, etc., improve purity and yield, and promote dissolution. , the effect of improving rigidity and compressive strength

Pending Publication Date: 2020-12-04
ZHEJIANG UNIV OF TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high temperature means high energy consumption and cost, and the use of strong acid is easy to cause environmental pollution, refer to literature 10Gao, F.; Gao, L.; Zhang, D.; Ye, N.; Chen, S.; Li, D., Enhanced Hydrolysis of Macrocystis pyrifera by integrated hydroxyl radicals and hot water pretreatment. Bioresource Technology 2015, 179, 490-496

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Green process for extracting ultralow-viscosity low-M/G-value sodium alginate from kelp
  • Green process for extracting ultralow-viscosity low-M/G-value sodium alginate from kelp
  • Green process for extracting ultralow-viscosity low-M/G-value sodium alginate from kelp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A green process for extracting ultra-low viscosity and sodium alginate with low M / G value from kelp, comprising the following steps:

[0037] The first step, kelp pretreatment

[0038] Wash and dry the kelp and grind it into 60-mesh powder with a drug grinder for later use. Take 10g of dried kelp and add 20 times distilled water to soak at room temperature for 2 hours;

[0039] The second step, enzymatic hydrolysis of kelp

[0040] Add 0.280g cellulase, 0.280g pectinase, 0.140g protease to the pretreated kelp solution, then add citric acid buffer solution to control the pH of the system to 4, enzymolysis at 50°C for 18 hours, then keep at 90°C 5min to inactivate the enzyme;

[0041] The third step, ultrasonic digestion

[0042] Add 2% of the solution mass of sodium carbonate to adjust the pH to 9, apply ultrasound at 150w for 30min, and carry out alkali digestion at 50°C to obtain a pasty viscous liquid. Filter by centrifugation and take the supernatant.

[0043] T...

Embodiment 2

[0047] A green process for extracting ultra-low viscosity and low M / G value sodium alginate from kelp, comprising the following steps:

[0048] The first step, kelp pretreatment

[0049] Wash and dry the kelp and grind it into 50-mesh powder with a drug grinder for later use. Take 10g of dried kelp and add 20 times distilled water to soak at room temperature for 1.5h;

[0050] The second step, enzymatic hydrolysis of kelp

[0051] Add 0.280g cellulase, 0.280g pectinase, 0.140g protease to the pretreated kelp solution, then add citric acid buffer solution to control the pH of the system to 4, enzymolysis at 50°C for 15 hours, then keep at 90°C 5min to inactivate the enzyme;

[0052] The third step, ultrasonic digestion

[0053] Add 2% of the solution mass of sodium carbonate to adjust the pH to 9, apply ultrasound at 150w for 120min, and carry out alkali digestion at 50°C to obtain a pasty viscous liquid. Centrifugal filtration, take the supernatant;

[0054] The fourth st...

Embodiment 3

[0063] A green process for extracting ultra-low viscosity and low M / G value sodium alginate from kelp, comprising the following steps:

[0064] The first step, kelp pretreatment

[0065] Wash and dry the kelp and grind it into 150-mesh powder with a drug grinder for later use. Take 10g of dried kelp and add 20 times distilled water to soak at room temperature for 1 hour;

[0066] The second step, enzymatic hydrolysis of kelp

[0067] Add 0.315g cellulase, 0.315g pectinase, 0.070g protease to the pretreated kelp solution, then add citric acid buffer solution to control the pH of the system to 5, enzymolysis at 60°C for 12 hours, then keep at 90°C 5min to inactivate the enzyme;

[0068] The third step, ultrasonic digestion

[0069] Add 4% of the solution mass of sodium carbonate to adjust the pH to 11, apply ultrasound at 150w for 70min, and carry out alkali digestion at 40°C to obtain a pasty viscous liquid. Centrifugal filtration, take the supernatant;

[0070] The fourth...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a green process for extracting ultralow-viscosity low-M / G-value sodium alginate from kelp. The green process comprises the following steps: 1, pretreating kelp; 2, performingkelp enzymolysis; 3, carrying out ultrasonic digestion treatment; and 4, performing ethanol purification treatment; and adding the digested sodium alginate solution into the same amount of industrialalcohol to obtain large white, precipitating, taking out the precipitate, carrying out vacuum drying at 40 DEG C-60 DEG C, and crushing to obtain the white powdery ultralow-viscosity sodium alginate finished product. According to the invention, the technological process is optimized, the purity and the yield of the sodium alginate are improved, the production period is shortened, and the sodium alginate with ultralow viscosity and low M / G value is extracted under the mild conditions of normal temperature and normal pressure. The energy consumption is reduced, by reducing the consumption of acid and alkali in the technological process, the pollution to the environment is reduced, and the reduction of the production cost is also facilitated.

Description

technical field [0001] The invention relates to the field of extracting sodium alginate with ultra-low viscosity and low M / G value, and specifically relates to a method of using compound enzymatic hydrolysis pretreatment and ultrasonic-assisted digestion to extract ultra-low viscosity and low M from kelp under mild conditions of normal temperature and pressure. / G value of sodium alginate method. Background technique [0002] Sodium alginate (Sodium alginate, SA), also known as alginate or sodium alginate, is a kind of natural polysaccharide extracted from the cell wall and intercellular substance of brown algae such as kelp or sargassum by alkali. Reference 1: Lee, K.Y.; Mooney, D.J., Alginate: Properties and biomedical applications. Progress in Polymer Science 2012, 37(1), 106-126. and Document 2: Wang Xiaohua, Extraction and Application of Sodium Alginate. Journal of Chongqing Institute of Technology 2007. Sodium alginate has excellent biocompatibility and biodegradabili...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04
CPCC08B37/0084C08B37/0003
Inventor 艾宁李蓝王祁宁刘秋平黎姗姗
Owner ZHEJIANG UNIV OF TECH