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Hydrazine wastewater adsorbent and preparation method thereof

An adsorbent and waste water technology, which is applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as unsatisfactory adsorption effect of unsymmetrical dimethylhydrazine, and achieve strong structural design, efficient adsorption, The effect of excellent adsorption effect

Active Publication Date: 2022-03-11
中国人民解放军96901部队23分队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a hydrazine wastewater adsorbent and a preparation method thereof, which solves the problem of unsatisfactory adsorption effect of unsymmetrical dimethylhydrazine in wastewater treated by physical adsorption method in the prior art

Method used

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  • Hydrazine wastewater adsorbent and preparation method thereof
  • Hydrazine wastewater adsorbent and preparation method thereof
  • Hydrazine wastewater adsorbent and preparation method thereof

Examples

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preparation example Construction

[0026] The preparation method of hydrazine wastewater adsorbent of the present invention comprises the steps:

[0027] S100: Weigh 100 parts of solvent into a three-neck round bottom flask, add 5-20 parts of ethylene-vinyl alcohol copolymer polymer content, and dissolve until a homogeneous solution is formed. Preferably, the vinyl alcohol monomer molar content of the ethylene-vinyl alcohol copolymer polymer is 20% to 30%, so that the obtained modified material can reach the best state of adsorption;

[0028] S200: In the three-neck round bottom flask, continue to add maleic anhydride with a content of 1.25 to 20 parts, preferably the molar content of maleic anhydride is 50% to 100% of the hydroxyl molar content in the ethylene-vinyl alcohol copolymer macromolecule, more preferably Preferably 75% to 100%, mixed evenly to form a homogeneous solution;

[0029] S300: Put the three-neck bottle into a water bath with a shaking function, and control the temperature of the water bath...

Embodiment 1

[0035] The present embodiment provides a kind of hydrazine wastewater adsorbent, and its preparation method comprises the following steps:

[0036] (1) Weigh 100 g of dimethylacetamide solvent, add it into a three-necked round-bottomed flask, then add 10 g of ethylene-vinyl alcohol copolymer, and dissolve until a homogeneous solution is formed; wherein the ethylene-vinyl alcohol copolymer macromolecule, The molar content of vinyl alcohol monomer is 20%;

[0037](2) In the three-necked round bottom flask, continue to add 5.02g maleic anhydride, now the molar content of maleic acid is 80% of the hydroxyl molar content in the ethylene-vinyl alcohol copolymer macromolecule, mix uniformly, form homogeneous phase solution;

[0038] (3) Put the three-neck bottle into a water bath, control the temperature of the water bath to be 35° C., and the reaction time to be 72 hours;

[0039] (4) Remove the dimethylacetamide solvent from the reacted solution under vacuum conditions, and simul...

Embodiment 2

[0042] The present embodiment provides a kind of hydrazine wastewater adsorbent, and its preparation method comprises the following steps:

[0043] (1) Weigh 100 g of dimethylacetamide solvent, add it into a three-neck round bottom flask, then add 10 g of ethylene-vinyl alcohol copolymer, and dissolve until a homogeneous solution is formed; wherein the ethylene-vinyl alcohol copolymer polymer The molar content of vinyl alcohol monomer is 20%;

[0044] (2) In the three-necked round bottom flask, continue to add 6.28g maleic anhydride, now the molar content of maleic acid is 100% of the hydroxyl molar content in the ethylene-vinyl alcohol copolymer macromolecule, mix uniformly, form homogeneous phase solution;

[0045] (3) Put the three-neck bottle into a water bath, control the temperature of the water bath to 90° C., and the reaction time to be 24 hours;

[0046] (4) Remove the dimethylacetamide solvent from the reacted solution under vacuum conditions, and simultaneously us...

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Abstract

The hydrazine wastewater adsorbent provided by the invention is a maleic anhydride grafted ethylene-vinyl alcohol copolymer high-molecular material, and the ring-opening esterification reaction of maleic anhydride is realized through the reaction between maleic anhydride and hydroxyl of a high-molecular side chain of an ethylene-vinyl alcohol copolymer. Further, the maleic acid-carboxyl grafted polyethylene-vinyl alcohol adsorbent material is obtained. The hydrazine substances in the wastewater can be efficiently adsorbed by utilizing the ionization effect between carboxyl and amino of the side chain of the maleic anhydride grafted ethylene-vinyl alcohol copolymer adsorbent, and the concentration of the hydrazine substances is effectively reduced. The hydrazine wastewater adsorbent not only has excellent adsorption performance on hydrazine substances in wastewater, but also has obvious adsorption capacity on toxic metal elements such as Pb < 2 + >, Cs < + > and Sr < 3 + > in the wastewater, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a hydrazine wastewater adsorbent and a preparation method thereof. Background technique [0002] Unsymmetrical dimethylhydrazine, methylhydrazine and hydrazine are commonly used liquid propellant fuels, among which unsymmetrical dimethylhydrazine is the main fuel for launch tests and launch vehicles of missiles, satellites, and spaceships, and is a highly toxic substance. During the storage and use of unsymmetrical dimethylhydrazine, a large amount of unsymmetrical dimethylhydrazine wastewater will be produced due to running, escaping, dripping, leaking and cleaning containers during transportation and use. The treatment methods of unsymmetrical dimethylhydrazine mainly include chemical method, physical method and biological method. [0003] Among them, the chemical method mainly uses an oxidation process to degrade unsymmetrical dimethylhydrazine. Using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28B01D53/02C08F8/14C08F210/02C08F216/06C02F101/38
CPCC08F8/14B01J20/265C02F1/285B01D53/02C02F2101/38B01D2257/40C08F210/02C08F216/06Y02P10/20
Inventor 陈通耿葵韩俊杰高缨温伟伟王庆波程金星吴友朋李浪高鑫张悦郑承银
Owner 中国人民解放军96901部队23分队
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