Carboxymethylation astragalus polysaccharide, synthesis and purification method and application of carboxymethylation astragalus polysaccharide as tobacco humectant

A technology of astragalus polysaccharides and carboxymethylation, which is applied in the fields of tobacco, application, and treatment of tobacco, to achieve obvious moisture retention effect, broad application prospects, and easy operation

Inactive Publication Date: 2015-09-09
CHINA TOBACCO HENAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant report on the application of carboxymethylated

Method used

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  • Carboxymethylation astragalus polysaccharide, synthesis and purification method and application of carboxymethylation astragalus polysaccharide as tobacco humectant
  • Carboxymethylation astragalus polysaccharide, synthesis and purification method and application of carboxymethylation astragalus polysaccharide as tobacco humectant

Examples

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Embodiment 1

[0022] A method for the synthesis and purification of carboxymethylated astragalus polysaccharides, comprising the following steps: adding 16g NaOH and 120mL solvent (ionic liquid / water=1:1, mass ratio) to a three-necked flask, stirring at room temperature until the solution is clear, adding 10g NaOH Astragalus polysaccharide was vigorously stirred for 20 minutes until fully dissolved, then slowly added 16.8g of chloroacetic acid, stirred and reacted at 50°C for 3 hours, cooled to room temperature, adjusted to pH 7 with dilute acetic acid, precipitated with alcohol, filtered, and collected the precipitate.

[0023] The precipitate was dissolved with an appropriate amount of water, precipitated with 3 times the volume of 95% ethanol, and centrifuged at 4000r / m for 20min. The precipitate was collected again and dialyzed against running water using a dialysis bag. Dialyzed with tap water for 24 hours, then with distilled water for 24 hours, and finally freeze-dried to obtain whit...

Embodiment 2

[0026] A method for the synthesis and purification of carboxymethylated astragalus polysaccharides, comprising the following steps: adding 16g NaOH and 120mL solvent (ionic liquid / water=1:1, mass ratio) to a three-necked flask, stirring at room temperature until the solution is clear, adding 10g NaOH Astragalus polysaccharide was vigorously stirred for 20 minutes until fully dissolved, then slowly added 16.8g of chloroacetic acid, stirred and reacted at 60°C for 3.5 hours, cooled to room temperature, adjusted to pH 7 with dilute acetic acid, precipitated with alcohol, filtered, and collected the precipitate.

[0027] The precipitate was dissolved with an appropriate amount of water, precipitated with 3 times the volume of 95% ethanol, and centrifuged at 4000r / m for 20min. The precipitate was collected again and dialyzed against running water using a dialysis bag. Dialyzed with tap water for 24 hours, then with distilled water for 24 hours, and finally freeze-dried to obtain wh...

Embodiment 3

[0030] A method for synthesizing and purifying carboxymethylated astragalus polysaccharides, comprising the following steps: adding 16g NaOH and 120mL solvent (ionic liquid / water=1:1, mass ratio) to a three-necked flask, stirring the solution at room temperature to clarify, adding 10g of astragalus Stir the polysaccharide vigorously for 20 minutes until fully dissolved, then slowly add 16.8g of chloroacetic acid, stir and react at 70°C for 4 hours, cool to room temperature, adjust the pH to 7 with dilute acetic acid, precipitate with alcohol, filter, and collect the precipitate.

[0031] The precipitate was dissolved with an appropriate amount of water, precipitated with 3 times the volume of 95% ethanol, and centrifuged at 4000r / m for 20min. The precipitate was collected again and dialyzed against running water using a dialysis bag. Dialyzed with tap water for 24 hours, then with distilled water for 24 hours, and finally freeze-dried to obtain white cotton-like carboxymethyla...

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Abstract

The invention relates to a synthesis and purification method for a carboxymethylation astragalus polysaccharide. The synthesis and purification method includes steps of stirring and dissolving an astragalus polysaccharide and sodium hydroxide in solvents; adding chloroacetate into the solvents; stirring the chloroacetate and the solvents to allow the chloroacetate and the solvents to react with one another for 3-4h at the temperatures of 50-70 DEG C to obtain products; cooling the products; regulating a pH (potential of hydrogen) value of the products until the products are neutralized; carrying out ethanol precipitation on the products; filtering the products; collecting precipitates; dissolving the precipitates in water; carrying out ethanol precipitation on the precipitates; dialyzing the precipitates; freezing and drying the precipitates to obtain a white flocculent carboxymethylation astragalus crude polysaccharide. The synthesis and purification method has the advantages that as proved by tests, excellent physical and sensual moisture retention effects can be realized for cigarettes by the carboxymethylation astragalus polysaccharide, irritation and offensive odor of the cigarettes can be reduced, the mellow and full sensation and the comfort of smoke of the cigarettes can be improved, and the carboxymethylation astragalus polysaccharide can be applied to the cigarettes as a tobacco humectant with excellent performance.

Description

technical field [0001] The invention belongs to the technical field of humectants, and in particular relates to a carboxymethylated astragalus polysaccharide, a synthesis and purification method and its application as a tobacco humectant. Background technique [0002] At present, polyhydroxy substances such as propylene glycol and sorbitol are mainly used as humectants in my country’s cigarette industry. The main purpose of using such humectants is to maintain the moisture content of shredded tobacco during processing and improve the processing resistance of shredded tobacco. Emollients are not ideal for maintaining the moisture content of finished cigarettes and improving smoking comfort. [0003] Polysaccharides are polymerized from a large number of monosaccharides, and a large number of hydroxyl groups form hydrogen bonds with water molecules, which have strong water holding capacity. Carboxymethylation of polysaccharides can not only improve their solubility, but also F...

Claims

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Application Information

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IPC IPC(8): C08B37/00A24B15/40
CPCY02P20/54
Inventor 孙志涛陈芝飞芦昶彤郝辉宋金勇刘强
Owner CHINA TOBACCO HENAN IND
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