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Recovering method of acetone and ammonia in hydrated hydrazine waste salt water by ketone azine method

A technology for recovering ketazine method and ketazine method, which is applied in the field of recovery and utilization of acetone and ammonia, which can solve the problems of loss and low yield of hydrazine, and achieve the effect of improving yield

Active Publication Date: 2006-03-15
YIBIN TIANYUAN GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Visible, there is following shortcoming in such production method: in the reaction process, ammonia, acetone are excessive in a large amount, and ammonia, acetone content are too high in the distillation waste brine, if the distillation waste brine containing ketone and ammonia discharged in the distillation process is directly discharged, raw material acetone and A large amount of ammonia is lost from the waste brine, which will lead to a low yield of hydrazine hydrate produced by ketone method

Method used

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  • Recovering method of acetone and ammonia in hydrated hydrazine waste salt water by ketone azine method

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Embodiment 1

[0027] (a) The waste brine in the production process of hydrazine hydrate by ketazine method is continuously sent to the distillation tower, and the steam at 150°C is continuously and directly passed into the bottom of the distillation tower to make the waste brine form bubbling, and the steam flow rate is used to control the distillation tower The temperature at the top is 90°C, and the temperature of the waste brine reaches 119°C. The acetone and ammonia in the waste brine in the tower kettle are evaporated, and the ketazine, acetone, and ammonia separated from the waste brine are recovered through the top of the tower and used as ketazine hydration The raw material for hydrazine production is sent back to the hydrazine hydrate production system using the ketazine method; the remaining waste brine is sampled and analyzed, which contains sodium chloride: 6%, ketazine: 0.1%, ammonia: 0.1%, acetone: 0.1% It can be seen that a large amount of ketazine, acetone, and ammonia have b...

Embodiment 2

[0030] Reclaim acetone and ammonia in the ketazine method hydrazine hydrate waste brine by the method in embodiment 1, change the steam temperature into 180 DEG C in wherein (a) step, enter the remaining waste brine temperature of the flash tank to be 122 DEG C, in The acetone and ammonia recovered after (b) step flash evaporation are not directly returned to the ketazine method hydrazine hydrate production system to use, but enter (a) step distillation tower as a heat source for rectification recovery, and acetone and ammonia After concentration, it can be used as raw material for the production of hydrazine hydrate by the ketazine method, react with sodium hypochlorite to obtain ketazine, and then hydrolyze to obtain hydrazine hydrate. Finally, the remaining brine can also be configured as qualified brine to be used as a raw material.

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Abstract

A process for reclaiming the acetone and ammonia from the rejected saline generated in preparing hydrazine hydrate from ammonia, sodium hypochlorite and ketone by oxidizing method includes bubble evaporating, flash evaporating, and returning the recovered acetone and ammonia back to production system of hydrazine hydrate.

Description

technical field [0001] The invention relates to a method for recovering acetone and ammonia taken away by waste brine in the process of producing hydrazine hydrate by using ammonia, sodium hypochlorite and ketone oxidation method, more specifically, for the acetone and ammonia taken away by waste brine in the distillation process methods of recovery and utilization. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 罗云刘灵伟李强袁雄孙永贵刘志明李福琼周明柴进祥
Owner YIBIN TIANYUAN GRP CO LTD
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