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A kind of preparation method of konjac glucomannan phosphate ester

A technology of konjac glucomannan and glucomannan ester, which is applied in the field of preparation of konjac glucomannan phosphate ester, to achieve the effects of reducing production cost, increasing collision frequency, and reducing activation energy

Active Publication Date: 2020-05-15
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The semi-dry method has been widely used in other modifications, but the use of vacuum-assisted microwave semi-dry method for the preparation of KGMP has not been reported in the literature at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of preparation method of konjac glucomannan phosphate ester of the present embodiment, described method comprises the steps:

[0033] The mixture of sodium dihydrogen phosphate and disodium hydrogen phosphate (molar ratio is 1.7:1) is prepared with 30% (wt%, KGM dry basis) distilled water to make a phosphate aqueous solution, and 1 mol / L of HCl and 1 mol / L of NaOH Adjust the pH value to 4.5;

[0034] Add a small amount of konjac glucomannan to the above-mentioned phosphate aqueous solution with adjusted pH value, stir to form a uniform suspension (wherein: the molar ratio of konjac glucomannan and phosphate in the suspension is 0.5:1 ), the suspension was sprayed into the KGM micropowder while stirring, mixed evenly to form a semi-dry mixture, then the mixture was put into a polyethylene bag, vacuum-treated for 30s with a vacuum packaging machine, and the mixture was removed from Take it out from the polyethylene bag, pour it into a beaker, place it in a microwa...

Embodiment 2

[0037] A kind of preparation method of konjac glucomannan phosphate ester of the present embodiment, described method comprises the steps:

[0038] Prepare a mixture of sodium dihydrogen phosphate and disodium hydrogen phosphate (molar ratio 1.7:1) with 25% (wt%, KGM dry basis) distilled water to prepare a phosphate aqueous solution, and use 1 mol / L of HCl and 1 mol / L of NaOH Adjust the pH value to 5.0;

[0039] A small amount of konjac glucomannan is added to the above-mentioned phosphate aqueous solution with adjusted pH value, stirred to form a uniform suspension (wherein: the molar ratio of konjac glucomannan and phosphate in the suspension is 0.6:1 ), spray the suspension into the KGM micropowder while stirring, mix evenly to form a semi-dry mixture, then put the mixture into a polyethylene bag, and vacuum-treat the mixture for 40s with a vacuum packaging machine, and then put the mixture Take it out from the polyethylene bag, pour it into a beaker, place it in a microwa...

Embodiment 3

[0042] A kind of preparation method of konjac glucomannan phosphate ester of the present embodiment, described method comprises the steps:

[0043] The mixture of sodium dihydrogen phosphate and disodium hydrogen phosphate (molar ratio 1.7:1) was prepared with 35% (wt%, KGM dry basis) of distilled water to prepare a phosphate aqueous solution, and 1 mol / L of HCl and 1 mol / L of NaOH Adjust the pH value to 5.5;

[0044] Add a small amount of konjac glucomannan to the above-mentioned phosphate aqueous solution with adjusted pH value, stir to form a uniform suspension (wherein: the molar ratio of konjac glucomannan and phosphate in the suspension is 0.8:1 ), the suspension was sprayed into the KGM micropowder while stirring, mixed evenly to form a semi-dry mixture, then the mixture was put into a polyethylene bag, vacuum-treated for 30s with a vacuum packaging machine, and the mixture was removed from Take it out from the polyethylene bag, pour it into a beaker, place it in a mic...

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PUM

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Abstract

The invention relates to a new preparing method of konjac gulcomannan phosphate, and belongs to the technical field of natural polymer material processing. The preparing method includes the followingsteps of firstly, preparing a mixture of sodium dihydrogen phosphate and disodium hydrogen phosphate into a phosphate water solution through distilled water, and adjusting the pH value to be 4-5.5; secondly, adding a small amount of konjac gulcomannan to the phosphate water solution to prepare a suspension, spraying the suspension into konjac gulcomannan (KGM) micropowder to prepare a semi-dry mixture, placing the semi-dry mixture into a polyethylene bag for vacuum treatment for 5-40 s, and pouring the mixture into a flask for microwave heating at the controlled temperature of 70-120 DEG C andreaction for 4-12 min; thirdly, eluting a product, and smashing, drying and screening an obtained filter cake to obtain the KGMP white. The prepared KGMP has the substitution degree of 0.107-0.208; through the vacuum treatment and microwave heating, the effects of high efficiency, energy conservation, emission reduction and consumption reduction can be achieved.

Description

technical field [0001] The invention belongs to the technical field of natural polymer material processing, and in particular relates to a preparation method of konjac glucomannan phosphate ester. Background technique [0002] Konjac glucomannan (Konjac glucomannan, referred to as KGM) is a natural plant polysaccharide extracted from konjac tubers, and its molecular formula is (C 6 h 10 o 5 )n. At present, the application of KGM is very limited and the added value is low, mainly limited to the processing of purified konjac flour, the development of bionic food and a small amount of health food. This is mainly due to the inherent properties of natural KGM, such as: low solubility in water, unstable aqueous solution, weak alkali resistance, easy degradation, and difficult storage, etc., which limit its application in industrial production. Therefore, in practical applications, KGM is often modified by methods such as sulfation, carboxymethylation, phosphorylation, acetylat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/02A23L29/00
CPCA23L29/05A23V2200/20C08B37/009
Inventor 钟耕刘丹邓利玲张庆张媛
Owner SOUTHWEST UNIV
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