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Synthetic method of sulfo bagasse xylan phthalate

A technology of phthalate and synthesis method, applied in the field of synthesis of sulfonic acid-based bagasse xylan phthalate, achieves good water solubility, surface activity, high biological activity, and easy-to-control process conditions. Effect

Active Publication Date: 2015-05-20
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the esterification modification of xylan at home and abroad is mainly focused on the monoesterification modification of xylan and its properties, and the diesterification modification of xylan is rarely reported in the literature.

Method used

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  • Synthetic method of sulfo bagasse xylan phthalate
  • Synthetic method of sulfo bagasse xylan phthalate
  • Synthetic method of sulfo bagasse xylan phthalate

Examples

Experimental program
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Effect test

Embodiment

[0042] (1) Put 2.5 g of bagasse xylan in a vacuum oven at 60° C. and dry to constant weight to obtain dry basis bagasse xylan.

[0043] (2) Take by weighing 2.0g of step (1) gained dry base bagasse xylan in a 250mL four-neck flask, add 80mL of analytically pure dimethylformamide as a reaction solvent, then add 2mL of analytically pure triethylamine catalyst, stir Lower the temperature to 70-80°C.

[0044] (3) Dissolve 5.0 g of phthalic anhydride in 10 mL of analytically pure dimethylformamide solvent, and slowly add it dropwise to the mixed solution in step (2) with a constant pressure funnel, and control the dropwise addition within 2.5 hours; continue Continuously react at 80°C for 5 hours; wash with 20mL of absolute ethanol, 10mL of analytical grade acetone and 20mL of distilled water in sequence, and then suction-filter to obtain bagasse xylan phthalate, a carboxylated product.

[0045] (4) Weigh 0.45 g of sodium nitrite and dissolve it in 10 mL of distilled water to obta...

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Abstract

The invention discloses a synthetic method of sulfo bagasse xylan phthalate. The synthetic method comprises the following steps: by taking bagasse xylan as a starting material, taking phthalic anhydride as a carboxylic acid esterification agent and taking triethylamine as a catalyst, synthesizing bagasse xylan phthalate in a dimethylformamide solvent; and then further synthesizing a sulfo bagasse xylan phthalate double esterification derivative in an alkaline water solvent by taking sodium trisulfamate as a second esterification agent. The bagasse xylan double esterification derivative namely sulfo bagasse xylan phthalate prepared by using the synthetic method disclosed by the invention integrates the properties of bagasse xylan carboxylic ester and bagasse xylan sulfate, and is easy to control synthesis process conditions; products have relatively high biological activity and good water solubility and surface activity; and modified double-active bagasse xylan has certain effects on the aspects of anti-HIV activity, anti-coagulation activity and platelet aggregation inhibition, and has relatively high application values in the fields of fine chemicals, foods and medicines.

Description

technical field [0001] The invention relates to a method for synthesizing sulfonic bagasse xylan phthalate. Background technique [0002] Guangxi is rich in sugarcane resources, and sugarcane produces a large amount of bagasse in the process of sugar production. In order to improve the utilization efficiency of bagasse resources, xylan, a biologically active substance, can be extracted from bagasse. Its main structure is composed of xylan Linked by β-1,4 glycosidic bonds. The application of xylan itself is relatively narrow. By chemical modification of xylan, its functional groups can be increased or changed, its inherent properties can be extended, and its biological activity and physiological function can be enhanced, thereby expanding its application range. [0003] In recent years, the research on chemical modification of xylan at home and abroad mainly includes esterification, etherification, oxidation, cross-linking and grafting. The modified xylan has enhanced surfa...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 李和平武冠亚杨旭袁金伟黄云燕邹英东孙彦
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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