SAFE METHOD FOR PRODUCING 2-METHYL-5-NITROTHETRAZOLE AND A MICROREACTOR FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC C07D257/04 B01J19/18 B01J19/26 

FIELD: technological processes.

SUBSTANCE: invention relates to a method for producing 2-methyl-5-nitrotetrazole by alkylation of the sodium salt of 5-nitrotetrazole in a two-phase system, an aqueous phase is methylene chloride, in which as the aqueous phase a reaction solution is used, obtained by the diazotization of 5-aminotetrazole with sodium nitrite in diluted sulfuric acid medium, followed by neutralization with sodium carbonate to pH=6.5–8.0, with the process of alkylation in a flow-type microreactor, and during the process a continuous measurement of the length of the dispersed phase droplets and fluid shells of a continuous phase is carried out, adjusting the position of a dispersing element of the microreactor in such a way as to ensure the maintenance of the two-phase flow parameters throughout the process. Invention also relates to a flow-type microreactor for implementing the production method.

EFFECT: proposed production method allows to increase the safety of the process by eliminating the need to work with the individual crystalline sodium salt of 5-nitrotetrazole, which in an anhydrous form is highly sensitive to mechanical impulses, provides continuous maintenance of stable hydrodynamic conditions of the process during the accumulation of reaction products in the system.

3 cl, 9 dwg, 3 ex