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Process for treating hydrazine hydrate waste salt water by ketone linking nitrogen method

A technology of ketazine method and treatment method, which is applied in the field of by-product waste brine treatment, can solve the problems of unfavorable environment, consumption of raw materials, environmental pollution, etc., and achieve the effect of fully utilizing resources and protecting the environment

Active Publication Date: 2006-06-28
YIBIN TIANYUAN GRP CO LTD +1
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Problems solved by technology

[0008] If the waste brine is directly discharged, it will not meet the relevant national environmental protection requirements, will pollute the environment, and consume raw materials
In the domestic hydrazine hydrate industry, most manufacturers use a single physical method to treat the waste brine produced by the ketazine process hydrazine hydrate, or directly discharge it. At present, there is no example of effectively removing impurities in the waste brine.
For substances such as prohydrazine and isopropanol, they are disposed of by direct combustion, which is also unfavorable to the environment.

Method used

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  • Process for treating hydrazine hydrate waste salt water by ketone linking nitrogen method

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment the present invention will be further described, but the present invention is not limited to these examples:

[0026] The chemical substances and their content ranges contained in the waste brine in the production process of ketazine method hydrazine hydrate are as follows:

[0027] Sodium hydroxide: 0.15%, ammonia: less than 0.1%, hydrazine hydrate: less than 0.1%, acetone: less than 0.1%, isopropylhydrazine and isopropanol are produced by side reactions, and their content depends on the specific conditions of production. The difference can reach about 2%. The following embodiments are based on the premise of normal working conditions.

[0028] Preheat the waste brine in the above-mentioned ketazine method hydrazine hydrate production process to 85°C-90°C through the preheater, and then control about 20m through the flow meter 3 The flow rate per hour continuously enters a rectification device. This rectif...

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Abstract

A process for treating the rejected saline generated in preparing hydrazine hydrate from ammonia, sodium hypochlorite and acetone includes such steps as high-pressure and ¿Ctemp hydrolyzing of ketazine in rejected saline, using rectifying tower to collect resultant acetone and ammonia, adding sodium hypochlorite solution, redox reaction between resultant hydrazine hydrate and residual acetone and ammonia to generate sodium chloride, water, N2 and chloromethane, and stirring and blowing with compressed air to carry the gas products away. The removed impurities can be reclaimed.

Description

technical field [0001] The invention relates to a treatment method for by-product waste brine in the process of producing hydrazine hydrate with ketone raw materials such as ammonia, sodium hypochlorite and acetone, more specifically, a treatment method for waste brine produced in the production process. Background technique [0002] Hydrazine hydrate, also known as: hydrazine hydrate, chemical formula: N 2 h 4 ·H 2 O, molecular weight: 50.07, is a fine chemical product. As a chemical intermediate, hydrazine hydrate has a wide range of potential uses and application fields, which are mainly divided into three aspects: first, the production of plastic foaming agents; second, in the steam cycle of the power industry, it is used to prevent The pipes are rusted and aged in advance, thereby greatly improving the safety and reliability of the power station; in addition, hydrazine hydrate is also an important raw material for medicine and pesticides. Various pro...

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Application Information

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IPC IPC(8): C02F1/04C02F1/58C02F103/34
Inventor 罗云刘灵伟李强袁雄陈华刘志明万立王万萍周明
Owner YIBIN TIANYUAN GRP CO LTD
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