A kind of acid still for the preparation of nitrochlorobenzene

Abstract

The invention relates to an acid steamer for nitrochlorobenzene preparation. A main body structure of the acid steamer is arranged to be an acid steaming kettle; a jacket covers the outer side of theacid steaming kettle; a stirrer is arranged on the top part of the acid steaming kettle; a speed governor is arranged on the lower part of the stirrer; a stirring rod is arranged in the acid steamingkettle; a stirrer is connected to the upper end of the stirring rod; the jacket is divided into an upper part and a lower part; the upper jacket is connected with an upper constant-temperature circulating tank through an upper constant-temperature circulating pipe; the lower jacket is connected with a lower constant-temperature circulating tank through a lower constant-temperature circulating pipe; a gas diffusion ring is arranged in the upper part of the acid steaming kettle; a heat-insulation sealing plate is arranged in the middle of the acid steaming kettle; an acid air pipe is arranged onthe heat-insulation sealing plate; the tail end of the acid air pipe is connected with an acid air diffusion ring; steaming holes are formed in the gas diffusion ring and the acid air diffusion ring.According to the acid steamer provided by the invention, the acid steaming kettle is divided into the upper part and the lower part, and the distilled mixed acid is collected, so that the temperaturecontrol is accurate, the acid steamer is environmental-friendly without pollution, the acid steaming efficiency is high, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of organic matter production, in particular to an acid still used for the preparation of nitrochlorobenzene. Background technique [0002] The synthesis of organic pesticide intermediate nitrochlorobenzene requires high concentrations of concentrated sulfuric acid and concentrated nitric acid as nitrating agents, but water will be continuously generated during the reaction process, resulting in lower concentrations of concentrated sulfuric acid and concentrated nitric acid, directly affecting the progress of the entire reaction , Sometimes it is necessary to steam acid and concentrate while the nitrification reaction is in progress, and the waste acid after the nitrification reaction also needs to be recycled directly, otherwise it will directly pollute the environment and cause ecological damage. [0003] The high-temperature acid still uses high-temperature furnace gas as the heating source. The used gas i...

AI Technical Summary

Problems solved by technology

[0002] The synthesis of organic pesticide intermediate nitrochlorobenzene requires high concentrations of concentrated sulfuric acid and concentrated nitric acid as nitrating agents, but water will be continuously generated during the reaction process, resulting in lower concentrations of concentrated sulfuric acid and concentrated nitric acid, which directly affect the progress of the entire reaction , sometimes it is necessary to steam acid and concentrate while the nitrification reaction is in progress, and the waste acid after the nitrification reaction also needs to be recycled directly, otherwise it will directly pollute the environment and cause ecological damage

[0003] The high-temperature acid still uses high-temperature furnace gas as the heating source. The used gas is directly used to heat the low-temperature acid still. Will react violently with unimaginable consequences

Images