Production apparatus and production method for methyl nitrite

A technology of methyl nitrite and production equipment, which is applied in the direction of nitrite preparation, organic chemistry, etc., can solve the problem of inability to ensure continuous and stable operation of the system, high requirements for the comprehensive quality and technical level of operators, and unstable product quality, etc. problem, to achieve the effect of high labor intensity, high risk factor and simple process

Active Publication Date: 2013-02-20
SINOPEC HUBEI CHEM FERTILIZER
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] This method has mature technology and reliable technology, but because intermittent operation is required, the continuous and stable operation of the system cannot be guarante

Method used

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  • Production apparatus and production method for methyl nitrite
  • Production apparatus and production method for methyl nitrite

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Experimental program
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Effect test

Embodiment 1

[0048]The device invented by the method consists of 1. belt conveying device, 2. dissolving stirring tank, 3. the first storage tank, 4. the second storage tank, 5. the third storage tank, 6. the first delivery pump, 7. the second Delivery pump, 8. The third delivery pump, 9. Nitrogen delivery pipe, 10. Circulating water cooler, 11. Methyl nitrite, 12. Reactor, 13. Baffle plate, 14. The fourth delivery pump, 15. Baffle plate (with baffle plate 13, is top view), 16. gas outlet, 17. rectification tower, 18. low-pressure steam inlet, 19. reboiler, 20. pipelines and equipment such as sodium nitrate solution outlet.

[0049] The belt conveyor 1 is connected to the dissolving stirring tank 2, and the bottom of the dissolving stirring tank 2 is connected to the first storage tank 3, the first storage tank 3 is connected to the reactor 12 through the first delivery pump 6, the second storage tank 4 and the third storage tank The tank 5 is connected to the reactor 12 through the second...

Embodiment 2

[0053] The method utilizing device of the present invention to produce methyl nitrite is:

[0054] a) Before the reactor 12 introduces raw materials, the circulating water cooler 10 introduces circulating water at 32°C to establish a circulating water system; the pressure of the reboiler 19 is set to 0.6MPa. The goodness of oil level, power supply and standby machine, etc., sodium nitrite solution, methanol and nitric acid solution are all ready, and the liquid level of each storage tank is not lower than 60%.

[0055] Implementation process:

[0056] b) The belt conveyor 1 transports the sodium nitrite solid to the top of the dissolving and stirring tank 2, and mixes and stirs the sodium nitrite solution with a concentration of 40% through the motor-driven agitator, and then enters the first storage tank 3, and the sodium nitrite solution passes through The first delivery pump 6 is delivered to the reactor 12. At the same time, the fresh methanol in the second storage tank 4...

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Abstract

The present invention provides a production apparatus and a production method for methyl nitrite. The apparatus comprises: a belt conveying device, a dissolving stirring tank, a first storage tank for storing sodium nitrite, a reactor, a second storage tank for storing methanol, a third storage tank for storing nitric acid, and a rectification tower. The production method comprises that: three solutions of sodium nitrite, methanol and nitric acid are added to the reactor; complete and uniform mixing is performed under stirring to carry out a reaction; the material outflowing from the reactor enters the rectification tower through adjustment valve control, and is subjected to gas-liquid two phase separation through the rectification tower; and the gas and the liquid are respectively discharged from a gas outlet and a sodium nitrate solution outlet, and the sodium nitrate solution discharged from the bottom of the rectification tower is conveyed to a sodium nitrate drying crystallization device to be adopted as a byproduct. According to the present invention, the conventional concept of multi-reaction kettle intermittent switching operation is broken through, continuous and uninterrupted production is achieved, characteristics of simple and short process route, safe operation and reasonable design are provided, and good economic benefits, social benefits and environmental protection benefits are provided.

Description

technical field [0001] The invention relates to a production device and a production method of methyl nitrite, in particular to a production device and a production method of continuous one-step production of methyl nitrite. Background technique [0002] The traditional production method of methyl nitrite adopts two-step method and one-step method. [0003] The two-step method is: the first step is to obtain NO through ammonia oxidation, and the second step is to react nitric oxide, methanol, and oxygen to form methyl nitrite. The reaction formula is as follows: [0004] 4NH 3 +5O 2 —4NO+6H 2 O+907.28KJ [0005] 2NO+1 / 2O 2 +2CH 3 OH→2CH 3 ONO+H 2 o [0006] This method is continuous production, and the operation is relatively simple, but the process is long, and the by-product nitrogen oxides produced by ammonia oxidation has a high content, which seriously pollutes the air. It is necessary to set up a nitrogen treatment system to ensure that the nitrogen oxide emis...

Claims

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Application Information

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IPC IPC(8): C07C201/04C07C203/00
Inventor 吴天平刘飞曾晓军张红才
Owner SINOPEC HUBEI CHEM FERTILIZER
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