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Straw modified into strong cation type absorbent and preparation method thereof

A cationic and adsorbent technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of low molecular weight, poor solubility, inactive chemical properties, etc., and achieve the effect of wide sources and low price

Inactive Publication Date: 2012-07-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural polymers also have many shortcomings in practical applications, such as: inactive chemical properties, poor solubility, relatively low molecular weight, and the flocculation effect is sensitive to pH, etc.

Method used

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  • Straw modified into strong cation type absorbent and preparation method thereof
  • Straw modified into strong cation type absorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Disperse the pulverized straw in a mixed solution of isopropanol and sodium hydroxide, wherein the mass percent concentration of sodium hydroxide aqueous solution is 40%, the mass ratio of isopropanol to sodium hydroxide solution is 65:35, the mass of straw The percentage content is 5%, and after stirring for 4 hours of alkalization reaction, the CTA isopropanol solution with a mass percentage concentration of 20% is slowly added dropwise to the alkalized straw solution, and the mass ratio of CTA to straw is 3:1. At 35°C, react for 12 h. Finally, the pH of the above system was adjusted to 6.5 by using an aqueous hydrochloric acid solution with a concentration of 1% by mass. Filter out the straw modified into a strong cationic adsorbent. Infrared spectra of straw and straw modified into strong cationic adsorbent see figure 1 ,from figure 1 (B) See wavenumbers 3344 and 2092nm -1 O-H and C-H characteristic absorption peaks respectively; 1478nm -1 It is the characteris...

Embodiment 2

[0031] Disperse the pulverized straw in a mixed solution of isopropanol and sodium hydroxide, wherein the mass percent concentration of sodium hydroxide aqueous solution is 10%, the mass ratio of isopropanol to sodium hydroxide solution is 15:85, the mass of straw The percentage content is 1%, and after stirring for 1 hour of alkalization reaction, the CTA isopropanol solution with a mass percentage concentration of 1% is slowly added dropwise to the alkalized straw solution, and the mass ratio of CTA to straw is 3:1. At 35°C, react for 12 h. Finally, the pH of the above system was adjusted to 6.5 by using an aqueous hydrochloric acid solution with a concentration of 1% by mass. Filter out the straw modified into a strong cationic adsorbent. The infrared spectra of the straw and the straw modified into a strong cationic adsorbent are the same as in Example 1.

[0032]

Embodiment 3

[0034] Disperse the crushed straw in a mixed solution of isopropanol and sodium hydroxide, wherein the mass percent concentration of sodium hydroxide aqueous solution is 25%, the mass ratio of isopropanol to sodium hydroxide solution is 20:80, the mass of straw The percentage content is 10%, and after stirring for 1 hour of alkalization reaction, the CTA isopropanol solution with a mass percentage concentration of 10% is slowly added dropwise to the alkalized straw solution, and the mass ratio of CTA to straw is 5:1. At 35°C, react for 8 h. Finally, the pH of the above system was adjusted to 5.0 by using an aqueous hydrochloric acid solution with a concentration of 5% by mass. Filter out the straw modified into a strong cationic adsorbent. The infrared spectra of the straw and the straw modified into a strong cationic adsorbent are the same as in Example 1.

[0035]

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PUM

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Abstract

The invention discloses straw modified into a strong cation type absorbent. The straw is characterized in that the straw and 3-chlorine-2-hydroxypropyl trimethylammonium chloride, and 2-hydroxypropyl trimethylammonium chloride is grafted on a cellulose molecular chain or a lignin molecular chain of the straw. The main raw material of the straw modified into the strong cation type absorbent is the crop waste which is abundant in sources, namely straw, the cost is low, and the straw is suitable for large industrialized production, is a natural high polymer material, has the characteristic of environmental friendliness, and is a water treatment agent which is economical and high in quality. The invention discloses the preparation method of the straw modified into the strong cation type absorbent.

Description

technical field [0001] The invention relates to utilization of straw and strong cationic adsorbent. Background technique [0002] Straw is the general term for the stems and leaves (ears) of mature crops. It usually refers to the remaining parts of wheat, rice, corn, potatoes, oilseeds, cotton, sugar cane and other crops after harvesting seeds, which is a type of crop waste. Since straw is rich in nitrogen, phosphorus, potassium and other elements, as well as organic substances such as cellulose and lignin, it is a multi-purpose renewable biological resource. At present, it is mainly used in fields such as fertilizer returning to the field, animal feed, fuel and building materials. [0003] However, with the development of agricultural production in our country, the grain output has increased significantly, and the amount of straw has also increased. In addition, the promotion of wood-saving and coal-saving technologies has resulted in a large amount of surplus straw in t...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
Inventor 杨琥张文轩杨朕李爱民
Owner NANJING UNIV
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