Method and device for fully automatically and continuously producing methyl nitrite

Abstract

The invention discloses a method and a device for fully automatically and continuously producing methyl nitrite. According to the method for continuously producing methyl nitrite, the liquid level, the temperature and the pressure in a reaction kettle are detected, and the detected liquid level value, the detected temperature value and the detected pressure value are remotely transmitted to a control unit; the control unit sends execution commands to valves in a pipeline between the raw material tank or the acid storage tank and the reaction kettle and a pipeline between the reaction kettle and the waste liquid tank according to preset conditions, and continuous reaction in the reaction kettle is realized by controlling the flow of a mixed solution of sodium nitrite and methanol and the flow of an acid solution. According to the method, through an automatic control system which comprises a detection unit, a control unit and an execution unit, the conventional intermittent operation concept is broken through, and automatic and continuous production of the methyl nitrite gas is achieved.

Description

technical field [0001] The invention relates to a fully automated method and device for continuous production of methyl nitrite, belonging to the field of chemical industry. Background technique [0002] Methyl nitrite is an important intermediate product in coal chemical industry, biomedicine and organic synthesis. In the field of coal chemical industry, it can be used for the synthesis of ester chemicals, such as the catalytic coupling of methyl nitrite and carbon monoxide to synthesize dimethyl oxalate, the esterification of carbon monoxide to synthesize dimethyl carbonate, and the synthesis of methyl formate, etc. technology. Ensuring the continuous and stable supply of methyl nitrite is the key to the stable operation of the whole process. [0003] Methyl nitrite is generally prepared by reacting methanol and sodium nitrite in the presence of an acid (such as concentrated sulfuric acid); it can also be obtained by oxidative esterification of nitric oxide. For the sec...

AI Technical Summary

Problems solved by technology

Methyl nitrite is unstable and easy to decompose, and there is a danger of combustion and explosion when exposed to heat sources and open flames

And high concentrations of methyl nitrite will cause a rapid increase in temperature and pressure when decomposed, which may lead to a runaway reaction and cause serious accidents, such as explosions, etc.

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