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Synthesis reactor and device and method for synthesizing methylhydrazine by chloramine process

A technology for synthesizing reactors and methylhydrazine, which is applied in chemistry/physics/physicochemical fixed reactors, hydrazine preparation, organic chemistry, etc., can solve the problems of excessive three wastes, high energy consumption, and low yield, and achieve three wastes Low energy consumption, high yield and high selectivity

Inactive Publication Date: 2015-07-08
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

[0008] The product yield of this method is low, energy consumption is large, three wastes are many, and cost is high

Method used

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  • Synthesis reactor and device and method for synthesizing methylhydrazine by chloramine process
  • Synthesis reactor and device and method for synthesizing methylhydrazine by chloramine process
  • Synthesis reactor and device and method for synthesizing methylhydrazine by chloramine process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment one, a kind of synthesis reactor, such as figure 1 , figure 2 .

[0052] Described synthesis reactor is provided with many jacketed pipes 10 and connecting elbow 20, is provided with the inner pipe 12 of flowing reaction medium and the outer pipe 13 outside the inner pipe in described jacketed pipe, the outer pipe 13 of jacketed pipe Both ends are provided with sealing flanges 11, forming a temperature-regulating medium flow space between the sealing flange and the inner and outer tubes of the jacket pipe, and the outer tube is provided with a temperature-regulating medium inlet pipe 14 and a temperature-regulating Medium outlet pipe 15; connecting flanges 21 are provided at both ends of the connecting elbow, and the two ends of the multiple jacketed pipes are connected end to end through connecting elbows, and one end of the jacketed pipe arranged in the first place is used as a composite The reaction medium inlet 30 of the reactor is arranged at one end ...

Embodiment 2

[0062] Embodiment two, a kind of chloramine synthesis methylhydrazine device, such as image 3 .

[0063] It includes an ammonia water preparation unit, a sodium hydroxide preparation unit, a sodium hypochlorite preparation unit, and a methylhydrazine generation unit; it is characterized in that:

[0064] The ammonia water preparation unit includes a liquid ammonia storage tank V203, an ammonia water mixing reactor X201, and an ammonia water preparation device X202. The ammonia water mixing reactor is provided with two input ports, and the liquid ammonia storage tank is connected to the The first input port of the ammonia water mixing reactor, the second input port of the ammonia water mixing reactor is connected to a soft water storage tank V201 through a pipeline provided with a valve and a pressurizing pump P201, and the ammonia water preparation device is the one described in embodiment one. A synthesis reactor, the inlet of the reaction medium of the ammonia water prepar...

Embodiment 3

[0072] Embodiment three, adopt the method for the device synthetic methylhydrazine described in embodiment two to comprise the following steps:

[0073] A. Preparation of ammonia water:

[0074] Mix liquid ammonia and soft water to prepare ammonia water with a mass concentration of 50-90%, and the reaction temperature is 0-60°C; this step is carried out in the ammonia water preparation unit described in Example 2;

[0075]The liquid ammonia from the liquid ammonia storage tank V203 and the soft water from the soft water storage tank V201 are pumped into the ammonia water mixing reactor X201 through the soft water pump P201 according to a certain ratio (mass concentration is 50-90%), and then enter the ammonia water preparation device X202, the mixing is exothermic. The jacketed cooling water of the ammonia water preparation device takes away the heat of the reaction, so that the system is maintained at about 0-60°C, and the configuration of ammonia water with different mass co...

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Abstract

The invention relates to a synthesis reactor and a device and method for synthesizing methylhydrazine by a chloramine process. The synthesis reactor is provided with multiple jacket pipes and a connecting bend, wherein an efficient mixed stuff is filled in each jacket pipe; a medium flow space is formed between an inner pipe and an outer pipe of the jacket pipe; and a temperature regulation medium inlet pipe and a temperature regulation medium outlet pipe are arranged at the two ends of the outer pipe. The device for synthesizing methylhydrazine by a chloramine process comprises an ammonia water preparation unit, a sodium hydroxide preparation unit, a sodium hypochlorite preparation unit and a methylhydrazine generation unit. The method comprises the steps of: preparation of ammonia water, preparation of a sodium hydroxide solution, preparation of a sodium hypochlorite solution, preparation of a chloramine solution and preparation of a methylhydrazine solution. According to the synthesis reactor and the device and method provided by the invention, the technology for producing methylhydrazine by a chloramine process has the characteristics of high yield and selectivity, low energy consumption and few three wastes, continuous large-scale production is realized, and the production cost is about 2 / 3 of that of a traditional chloramine process.

Description

technical field [0001] The invention belongs to chemical production equipment and methods, in particular to a synthesis reactor and a device and method for synthesizing methylhydrazine by a chloramine method. Background technique [0002] In the prior art, the synthesis process of methylhydrazine produced by the traditional chlorine ammonia method is as follows: About 20% (W / W) sodium hydroxide solution reacts with liquid chlorine, and the solution after the reaction is sequentially mixed with 40% mass concentration Ammonia solution and methylamine solution with a mass concentration of 40% react to finally generate methylhydrazine and sodium chloride, and the mass concentration of methylhydrazine in the solution is less than 2%. In the reaction process, the aqueous solution of ammonia water and methylamine is excessive, the molar ratio of sodium hypochlorite, NH3 and methylamine is 1:3:6, and then the methylhydrazine solution with a mass concentration of less than 2% is sequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/24C07C243/14C07C241/02
Inventor 张征顾兰勋
Owner 上海海唇机械设备工程技术有限公司
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