Process device for producing methyl nitrite

Abstract

The invention provides a process device for producing methyl nitrite. The process device comprises a reactive distillation tower, a pre-reactor, a pre-heater, a reboiler, a methanol recovering and buffering groove and an acid water groove, wherein a condenser is arranged in reactive distillation tower; the pre-reactor, the pre-heater, the reactive distillation tower, the reboiler and the methanol recovering and buffering groove are connected in sequence; the input end of the pre-reactor is connected with an NO recycle gas pipeline and an oxygen pipeline in a carbonylation reaction process respectively; the oxygen pipeline is provided with an air separating device; the two ends of a subcooler are communicated with the condenser and the reactive distillation tower respectively; one end of the subcooler is connected with a carbonylation reaction system; the input port of the acid water groove is connected with an acid water pipe and a process soft water pipe respectively; and a first circulation pump and a second circulation pump are arranged among the methanol recovering and buffering groove, the acid water groove and the reactive distillation tower respectively. The process device is simplified, production equipment is saved, the production cost is lowered, and the process device can be better applied to an ethylene glycol process.

Description

Technical field [0001] The invention involves a process device in the production of ethylene glycol, which is specifically a process device that produces nitride in the production of ethylene glycol. Background technique [0002] Nitrodic acid, colorless gas.The melting point -17 ℃.Boiling point -12 ℃.Yishui explains nitrite. The production of nitride is a process in the production of ethylene glycol process devices. At present, the processing device that is often used to produce nitrite includes tetraoxide dioxide grooves, tetraoxidine dioxide evaporation evaporationInstruments and craftsmanship, the craft soft water tank is made of stainless steel.Temu oxidation two nitrogen is used as a raw material for manufacturing nitric acid, aquatic metal salt and nitrochinomy compatrion; inhibitors used as polymerization of oxidants, nitrates and acrylic polycases in organic chemistry;Taking explosives and rocket pushing agents, as a strong oxidant, the cost of related equipment for tetr...

AI Technical Summary

Problems solved by technology

Dinitrogen tetroxide is used as a raw material for the manufacture of nitric acid, anhydrous metal salts and nitro coordination complexes; it is used as an oxidizing agent, a nitrating agent and an inhibitor of acrylate polymerization in organic chemistry; Explosives and rocket propellants are used as strong oxidants, and the cost of equipment related to dinitrogen tetroxide is relatively high. Oxygen in the esterification reaction is completely provided by the outside, and the cost ratio is high

Because the water tank uses process soft water, the process soft water is wasted, resulting in an increase in the cost of the entire production process device

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