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In organic chemistry, an electrophilic addition reaction is an addition reaction where, in a chemical compound, a π bond is broken and two new σ bonds are formed. The substrate of an electrophilic addition reaction must have a double bond or triple bond.
Process for producing 2-chloropropene nitrile by multistage reaction and device thereof
This invention provides a multi-stage reaction production process and apparatus for 2-chloroacrylonitrile, relating to the field of 2-chloroacrylonitrile production technology. The process includes: using acrylonitrile as raw material in a chlorination reactor, a crude 2,3-dichloropropionitrile is produced by electrophilic addition reaction with chlorine gas under the action of a chlorination catalyst; the crude 2,3-dichloropropionitrile is fed into a vacuum degassing module to remove dissolved hydrogen chloride and unreacted chlorine gas; the degassed crude 2,3-dichloropropionitrile enters an elimination reactor, where it is further treated with a 10% sodium hydroxide solution to obtain crude 2-chloroacrylonitrile. By using a cleaning tube scraping method, the detection error of the temperature sensor due to the accumulation of impurities over time is reduced, ensuring that the temperature sensor can detect the temperature inside the chlorination reactor in real time and accurately. This solves the problem that the surface of the temperature sensor gradually accumulates impurities over time, leading to increased measurement error.
