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Aminocellulose and application thereof

A technology of cellulose and cellulose sulfate, applied in other chemical processes, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of unfavorable industrial production and application, high price, difficult to obtain, etc., and achieve the effect Good, low-cost, low-cost effects

Inactive Publication Date: 2018-01-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method technique is relatively simple, the alkylating agent X-(CH 2 )n-NR 1 R 2 Not easy to obtain, expensive, not conducive to industrial production and application

Method used

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  • Aminocellulose and application thereof
  • Aminocellulose and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add cellulose sodium sulfate and 25% ammonia water into the autoclave at a molar ratio of 1:5, seal it quickly, and react at 180° C. with self-boosting constant temperature stirring for 24 hours. After the reaction was completed, it was naturally cooled to room temperature, a solid was formed during the reaction, the solid-liquid was separated to separate the filter cake, and dried at 80° C. to constant weight. The product was found by nuclear magnetic analysis, and a new peak appeared at δ=41ppm, which was -CH after consulting 2 Chemical shift of -N-; N content determined by elemental analysis DS = 1.31. Comprehensive analysis of the NMR C spectrum and N content of the product can confirm that the method in this study was used to successfully replace the amino group of sodium cellulose sulfate.

Embodiment 2

[0026] Add cellulose sodium sulfate and 25% ammonia water into the autoclave at a molar ratio of 1:5, seal it quickly, and react at 180° C. with self-boosting constant temperature stirring for 6 hours. After the reaction was completed, it was naturally cooled to room temperature, a solid was formed during the reaction, the solid-liquid was separated to separate the filter cake, and dried at 80° C. to constant weight. The product was found by nuclear magnetic analysis, and a new peak appeared at δ=41ppm, which was -CH after consulting 2 Chemical shift of -N-; DS = 1.09 determined by elemental analysis for N content. Comprehensive analysis of the NMR C spectrum and N content of the product can confirm that the method in this study was used to successfully replace the amino group of sodium cellulose sulfate.

[0027] Apply the prepared amino group-containing cellulose derivatives to the adsorption of heavy metal ions:

Embodiment 3

[0029] Add the aminocellulose (DS=1.31) prepared in Example 1 of the present invention into the lead ion solution, stir and adsorb, and after reaching the adsorption equilibrium, analyze the concentration of heavy metals in the solution before and after adsorption, and measure the concentration of ion adsorption in the aminocellulose solution. The rate is 81.6%. The aminocellulose that adsorbs lead ions is desorbed, and the specific process is as follows: soak the aminocellulose that adsorbs lead ions obtained by filtration with a small amount of 1% HCl for 30 minutes, filter, and then soak the filter cake with a small amount of 1% NaOH for 30 minutes Filter, then wash the filter cake with distilled water until it is neutral, dry it at 60°C and then recycle it. The adsorption effect is good.

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Abstract

The invention discloses aminocellulose and application thereof. A structure formula is shown in the description, wherein X is -SO3Na or -SO3NH4, and has the amino substitution degree DS being 0.50 to1.40. The cellulose sulfate is used as raw materials for synthesizing the aminocellulose together with ammoniation reagents through a one-step method; the raw material price is low; the resources arewide; the process is simple; the cost is low; the defects of complicated production process, severe reaction conditions, high raw material price and high process cost of the existing synthesis methodare overcome. The prepared aminocellulose has the advantages that the adsorption effect on heavy metal ions in the waste water is relatively good; the practical application value is relatively high.

Description

technical field [0001] The invention belongs to the technical field of organic polymer compounds, and in particular relates to amino cellulose and its application. Background technique [0002] Carbohydrates are a renewable organic resource, one of the main sources of food, clothing, and use in people's lives, and play an important role in maintaining life activities. Amino sugar is a nitrogen-containing derivative of sugar compounds, an important component of many biological macromolecules and microbial metabolites, and has important biochemical effects. Chitosan, as a typical amino sugar compound, is widely used in agriculture, food industry, textile industry, daily chemical industry and other fields, especially in the field of environmental protection, it can be used as a water treatment agent for heavy metals in industrial wastewater. deal with. After the high-concentration heavy metal wastewater is treated by conventional methods such as chemical precipitation and ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C08B15/06C02F101/20
Inventor 吐松牛慧慧尹应武叶李艺陈学云
Owner XIAMEN UNIV
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