Content-adjustable methylhydrazine synthetic-fluid refining apparatus and method

A refining device and technology of methyl hydrazine, applied in the preparation of hydrazine, organic chemistry, etc., can solve the problems of no way to recycle caustic soda, cannot continue production, pollute groundwater, etc., to avoid repeated evaporation and condensation, and reduce run-off Drip, pollution reduction effect

Inactive Publication Date: 2013-11-20
上海海唇机械设备工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Large energy consumption: In order to remove the salt and alkali in the methylhydrazine synthesis liquid, all the synthesis liquid is evaporated, and the liquid phase is evaporated into corresponding steam, consuming a large amount of heating steam, and then condensed into a liquid phase at about 30°C with cooling water , consumes a large amount of cooling water; then the liquid phase at about 30°C enters the dehydration distillation tower, changes from liquid phase to vapor phase, and then from vapor phase to liquid phase, so as to remove water; the concentrated methylhydrazine aqueous solution is added The caustic soda, which is close to its mass flow rate, enters the finished rectification tower again to complete the concentration of the methylhydrazine product with a mass concentration of 43%, which consumes a lot of energy; according to the analysis of actual production data, the energy consum

Method used

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  • Content-adjustable methylhydrazine synthetic-fluid refining apparatus and method
  • Content-adjustable methylhydrazine synthetic-fluid refining apparatus and method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] like figure 1 , a methylhydrazine synthesis liquid refining device with adjustable content, including evaporative distillation feed tank V-3305, evaporative heater E-3402, evaporator E3401, evaporative distillation tower T-3401, finished product tower T3501, and then Boiler E-3502 and automatic centrifuge C-3301; it is characterized in that, the feed inlet of described evaporative rectification feeding tank is provided with the methylhydrazine synthesis liquid F1 that removes ammonia and monomethylamine outside the boundary area The connected pipeline, the discharge port of the evaporative distillation feed tank is connected to the feed port of the evaporation heater through the feed pipeline V-3305a provided with a flow regulating valve FV2451, and the evaporative distillation feed tank is provided with a working pressure of Nitrogen F2 input port with a pressure of 0~1.5MPa;

[0041] The discharge port of the evaporation heater is connected to the feed port of the ev...

Embodiment 2

[0057] A method for refining methylhydrazine synthesis liquid with adjustable content, said method is the method for the methylhydrazine product whose refining concentration is 20% to 99% in the device described in embodiment one; the steps of said method are:

[0058] a. Send the methylhydrazine synthesis liquid from ammonia and monomethylamine into the evaporative rectification feed tank, input nitrogen into the evaporative rectification feed tank, and start the gas-liquid separation of the evaporative distillation tower described in Example 1 The vacuum pump connected to the device;

[0059] b. The methylhydrazine synthesis liquid in the evaporative rectification feed tank is sent to the evaporator heater for heating and vaporization under the vacuum degree and nitrogen pressure generated by the vacuum pump;

[0060] c. The methylhydrazine synthesis liquid heated in step b enters the evaporator for evaporation to obtain three products: a liquid phase product, a solid pha...

Embodiment 3

[0069] This embodiment is a specific implementation of the method described in Example 1; the steps of the method are:

[0070] a. Send the methylhydrazine synthetic liquid that removes ammonia and monomethylamine into the evaporative rectification feed tank, and input pressure into the evaporative rectification feed tank with a pressure of 0.2 MPa of nitrogen to start the evaporative rectification tower The vacuum pump connected to the gas-liquid separator, the vacuum pressure of the vacuum pump is gauge pressure-0.08MPa.

[0071] b. The methylhydrazine synthesis liquid in the evaporative rectification feed tank is sent to the evaporator heater for heating and vaporization under the vacuum degree and nitrogen pressure generated by the vacuum pump;

[0072] c. The methylhydrazine synthesis liquid heated in step b enters the evaporator for evaporation to obtain three products: a liquid phase product, a solid phase and liquid phase mixed product containing solid salt, and a g...

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Abstract

The invention relates to a content-adjustable methylhydrazine synthetic-fluid refining apparatus and a method. The apparatus comprises an evaporation rectification feeding tank, an evaporation heater, an evaporator, an evaporation rectifying column, a finished-product column, a reboiler and an automatic centrifuge, and is used to refining a methylhydrazine synthetic fluid. The benefits of the apparatus and the method comprises: the technological flow of refining methylhydrazine is improved, production energy consumption is substantially reduced; pollution is reduced; the methylhydrazine content in the refined methylhydrazine synthetic fluid can be adjusted in a larger scope; and the apparatus and the method are applicable to production of multiple methylhydrazine synthetic fluid with different methylhydrazine content, and help to realize continuous production and automatic control.

Description

technical field [0001] The invention belongs to chemical production equipment and methods, in particular to a device and method for refining methylhydrazine synthetic liquid with adjustable content. Background technique [0002] Methylhydrazine CH 3 NHNH 2 Also known as monomethylhydrazine, monomethylhydrazine, boiling point 87.5 ℃. The binary system composed of water has the highest constant boiling point. The azeotropic point under normal pressure was 107° C., the azeotropic composition was 0.267 (mol fraction), and the converted weight fraction was 0.482. The manufacture of the pure product of the traditional methylhydrazine aqueous solution is to obtain the pure product of methylhydrazine through steps such as separation, desalting, concentration, distillation, etc. The defect of the traditional manufacturing method is: [0003] Large energy consumption: In order to remove the salt and alkali in the methylhydrazine synthesis liquid, all the synthesis liquid is evapor...

Claims

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Application Information

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IPC IPC(8): C07C243/14C07C241/02
Inventor 张征顾兰勋侯秋实
Owner 上海海唇机械设备工程技术有限公司
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