Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for depriving acetyl of kanjak glucomannosan

A technology of glucomannan acetylation and konjac glucomannan, applied in the field of removing acetylation of konjac glucomannan, achieving the effect of low cost and easy operation

Inactive Publication Date: 2011-05-04
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many studies focus on the micronization of powder by mechanochemistry, and the research on introducing and removing active groups by mechanochemistry has not been reported yet.

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
  • Process for depriving acetyl of kanjak glucomannosan
  • Process for depriving acetyl of kanjak glucomannosan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Deacetylation of 50 grams of konjac glucomannan:

[0019] Step 1: Dry the konjac glucomannan at 50° C. with a blower until the water content is 4%, weigh 50 g of the dried konjac glucomannan, and add 0.5 g of sodium hydroxide as an alkaline modifier;

[0020] The second step: mix the above-mentioned konjac glucomannan and grinding medium evenly, add it into the grinding jar of the vibrating mill, seal the grinding jar, start the vibrating mill to grind for 60 minutes; the volume of the grinding medium is 50% of the volume of the grinding jar, and the grinding medium A glass ball with a diameter of 8mm is used;

[0021] Step 3: Separating the grinding medium by sieving to obtain deacetylated konjac glucomannan.

[0022] The mass percent of acetyl group in the gained konjac glucomannan is shown in Table 1, and the infrared analysis spectrogram is as shown in Table 1. figure 1 shown.

Embodiment 2

[0024] Deacetylation of 50 grams of konjac glucomannan:

[0025] Step 1: Dry the konjac glucomannan in a vacuum oven at 80° C. and vacuum-dry it to a water content of 2%, weigh 50 g of the dried konjac glucomannan, and add 2.5 grams of potassium hydroxide as a modifier;

[0026] The second step: mix the above-mentioned konjac glucomannan and the grinding medium evenly, add it into the grinding tank of the vibrating mill, seal the grinding tank, start the vibrating mill to grind for 50 minutes; the volume of the grinding medium is 85% of the volume of the grinding tank, and the grinding medium Use alumina balls with diameters of 15mm and 8mm respectively, and the volume ratio of the two alumina balls is 2:1;

[0027] Step 3: Separating the grinding medium by sieving to obtain deacetylated konjac glucomannan.

[0028] The mass percentage of acetyl group in the gained konjac glucomannan is as shown in Table 1, and the infrared analysis spectrogram of gained konjac glucomannan is...

Embodiment 3

[0030] Deacetylation of 50 grams of konjac glucomannan:

[0031] Step 1: Dry the konjac glucomannan at 70° C. to a water content of 3% with a blast dryer, weigh 50 g of the dried konjac glucomannan, and add 0.25 g of calcium hydroxide as a modifier;

[0032] The second step: mix the above-mentioned konjac glucomannan and grinding medium evenly, add it into the grinding tank of the vibrating mill, seal the grinding tank, start the vibrating mill to grind for 20 minutes; the volume of the grinding medium is 90% of the volume of the grinding tank, and the grinding medium Use zirconia balls with diameters of 8mm and 6mm respectively, and the volume ratio of the two zirconia balls is 1:1;

[0033] Step 3: Separating the grinding medium by sieving to obtain deacetylated konjac glucomannan.

[0034] The mass percentage of acetyl group in the gained konjac glucomannan is as shown in Table 1, and the infrared analysis spectrogram of gained konjac glucomannan is as follows figure 1 sh...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a method for removing an acetyl of konjac glucomannan by adopting the mechanochemical method. The method for removing an acetyl of konjac glucomannan comprises the following: step 1. the konjac glucomannan is dried to the extent that the liquid water content is less than or equal to 4 percent, an alkaline modifying agent with a mass occupying 0.5 to 5 percent of the mass ofthe konjac glucomannan is added; step 2. the konjac glucomannan and the grinding medium are mixed evenly and are added into a grinding jug of a vibromill to be grinded for 20 to 60 minutes; the volume of the grinding medium is 50 to 90 percent of that of the grinding jug; step 3. the grinding medium is separated to obtain the konjac glucomannan, the acetyl of which is removed. The method for removing the acetyl of konjac glucomannan adopts the mechanochemical method, has simple and convenient operation and low cost, does not pollute the environment, and is more likely to satisfy the requirements of the industrial production on different application performances of the konjac glucomannan.

Description

technical field [0001] The invention relates to a method for removing the acetyl group of konjac glucomannan, in particular to a method for removing the acetyl group of konjac glucomannan by using a mechanochemical method. Background technique [0002] Konjac glucomannan (KGM for short) is a natural polysaccharide extracted from the Araceae plant-Konjac bulb, and is the most viscous vegetable gum known in nature. Because of its good film-forming and water-absorbing properties, it is widely used as polymer materials such as membrane materials, chromatographic fillers, flocculants, and water-absorbing agents. KGM is composed of D-glucose and D-mannose connected by β-1,4 glycosidic bonds in a ratio of about 1:1.5, and there are β-1,3 glycosidic bonds on the C-3 position of some sugar residues Each branch has several to dozens of sugar residues, and there is one acetyl group bonded by an ester bond for every 19 sugar residues on the main chain. In the presence of alkali, konja...

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 Patents(China)
IPC IPC(8): C08B37/02
Inventor 王燕民贺珂潘志东李新衡谢平波胡国明
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com