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

• Main Authors: LU CHANGTONG, SUN ZHITAO, LIU QIANG, CHEN ZHIFEI, HAO HUI, SONG JINYONG
• Format: Patent
• Language: English
• Published: 09.09.2015
• Subjects: CHEMISTRY; CIGARETTES; CIGARS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING ORCHEWING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; SMOKERS' REQUISITES; SNUFF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TOBACCO

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.