Oxidant composition and method for treating hydrazine hydrate in industrial sewage

A technology for industrial sewage and composition, applied in the field of chemistry, can solve the problems of low efficiency, high production energy consumption, long processing time, etc.

Active Publication Date: 2019-01-11
上海融澈水性材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to use a certain amount of alcohol solution and high molecular polymer as protective agent. Although hydrazine hydrate is effectively degraded, an organic carbon source is introduced, causing total organic carbon (TOC) in the sewage to exceed the standard; moreover, the transition metal compound Low oxidation efficiency leads to long treatment time. After at least 24 hours, only about 65% of hydrazine hydrate is converted, so it has the defects of incomplete treatment, high production energy consumption and low efficiency

Method used

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  • Oxidant composition and method for treating hydrazine hydrate in industrial sewage
  • Oxidant composition and method for treating hydrazine hydrate in industrial sewage
  • Oxidant composition and method for treating hydrazine hydrate in industrial sewage

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0067] Preparation example 1, preparation of oxidizing agent composition

[0068] 1), 3Kg 2,2'-bipyridine and an appropriate amount of FeCl with a concentration of 0.5mol / L 3 The aqueous solution is added to the closed reaction kettle, and the FeCl used is controlled 3 Fe in aqueous solution 3+ The molar ratio of the total amount to the 2,2'-bipyridine is 1:3, the stirring speed is controlled at 150r / min, and the reaction is refluxed at 75°C for 3h to obtain the complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ The solution.

[0069] 2), to step 1) preparation containing complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ 12Kg dilute hydrochloric acid was added dropwise to the solution, and the rate of addition was controlled to add 1 drop every 2s, while reducing the rotation speed to 50r / min. After the addition, the pH value of the detection system was 1.67.

[0070] 3) Cool to room temperature, then add 70Kg of hydrogen peroxide aqueous solution, and mix well to obtain 1# oxidizing agent compositi...

preparation example 2

[0071] Preparation example 2, preparation of oxidizing agent composition

[0072] 1), 4Kg 2,2'-bipyridine and an appropriate amount of FeCl with a concentration of 0.5mol / L 3 The aqueous solution is added to the closed reaction kettle, and the FeCl used is controlled 3 Fe in aqueous solution 3+ The molar ratio of the total amount to the 2,2'-bipyridine is 1:3, the stirring speed is controlled at 150r / min, and the reaction is refluxed at 65°C for 3h to obtain the complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ The solution.

[0073] 2), to step 1) prepared containing complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ Add 5Kg of concentrated hydrochloric acid dropwise to the solution containing complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ The solution is under acidic conditions, the rate of addition is controlled to add 1 drop every 2s, and the rotation speed is reduced to 60r / min at the same time. After the addition is completed, the pH value of the detection system is 1.73.

[0074] 3), then cool to r...

preparation example 3

[0075] Preparation example 3, preparation of oxidizing agent composition

[0076] 1), 5Kg 2,2'-bipyridine and an appropriate amount of FeCl with a concentration of 0.5mol / L 3 The aqueous solution is added to the closed reaction kettle, and the FeCl used is controlled 3 Fe in aqueous solution 3+ The molar ratio of the total amount to the 2,2'-bipyridine is 1:3, the stirring speed is controlled at 150r / min, and the reaction is refluxed at 75°C for 2h to obtain the complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ The solution.

[0077] 2), to step 1) prepared containing complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ Add 29Kg of dilute hydrochloric acid dropwise to the solution containing complex [Fe(C 10 h 8 N 2 ) 3 ] 3+ The solution is acidic, and the rate of addition is controlled to add 1 drop every 2s, while reducing the rotation speed to 50r / min. After the addition, the pH value of the detection system is 2.03.

[0078] 3), then cooled to room temperature, then added 40Kg of tert-butyl...

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Abstract

The invention provides an oxidant composition for decomposing hydrazine hydrate in industrial sewage, application of the oxidant composition and a method for treating hydrazine hydrate in the industrial sewage. The oxidant composition comprises the following raw materials: peroxide, an Fe<3+>-containing water solution and 2,2'-dipyridyl, wherein the molar ratio of the total amount of Fe<3+> in theFe<3+>-containing water solution to 2,2'-dipyridyl is (1 to 2.7)-(1 to 3.3); the molar ratio of otal amount of Fe<3+> in the Fe<3+>-containing water solution to peroxy bonds is (1 to 10)-(1 to 100);a solution containing a complex [Fe(C10H8N2)3]<3+> is formed through the reflux reaction between Fe<3+>-containing water solution in a formula amount and 2,2'-dipyridyl, is adjusted to be acidic and is uniformly mixed with peroxide in a formula amount so as to generate the oxidant composition. By virtue of the treatment method, the treatment time is remarkably shortened, the reaction velocity is increased, the treatment cost is lowered, the secondary pollution is avoided, the oxidant composition is environment-friendly, and the content of hydrazine hydrate in the treated industrial sewage is lower than 100ppb.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to an oxidant composition and a method for treating hydrazine hydrate in industrial sewage. Background technique [0002] Hydrazine hydrate, also known as hydrazine hydrate, or hydrazine for short, is an important chemical raw material. During the process of preparing hydrazine hydrate and applying hydrazine hydrate (such as being used in steam boilers, piping systems or hydraulic tests to prevent equipment from rusting), a large amount of industrial sewage containing hydrazine hydrate will be produced, and the concentration of hydrazine hydrate is relatively high. The industrial wastewater containing hydrazine hydrate needs to be treated until it meets the relevant environmental protection discharge standards before it can be discharged. [0003] At present, the treatment methods of sewage containing hydrazine hydrate mainly include dilution method, standing natural decomposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/16
CPCC02F1/72C02F1/725C02F2209/14C02F2209/20C02F2209/06C02F2101/16
Inventor 王宇熊俊超陈占
Owner 上海融澈水性材料有限公司
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