Phase splitting device for producing 2-methyl-5-pyrazine carboxylic acid

Abstract

The invention discloses a phase splitting device for producing 2-methyl-5-pyrazinecarboxylic acid, and relates to the technical field of phase splitting equipment. The phase splitting device comprises a fixing frame, a mounting hole is formed in the middle of the top of the fixing frame, a centrifugal barrel is fixed to the inner wall of the mounting hole, and a rotary drum is arranged in the centrifugal barrel; and a fixed ring plate is fixed to the top end of the inner circumferential wall of the centrifugal barrel, a rotating ring plate is rotationally installed on the inner ring of the fixed ring plate, and the inner ring of the rotating ring plate is fixed to the outer circumferential wall of the rotating shaft. When reaching the extraction time set by a single-chip microcomputer, a second electromagnetic valve is turned on and a first electromagnetic valve is turned off, the light-phase liquid gradually flows out, the inert gas slowly returns to an anti-permeation rubber sleeve, the anti-permeation rubber sleeve gradually expands, and then a light-phase pipe is continuously pushed to gradually move so that the light-phase pipe can make contact with the light-phase liquid all the time until all hte light-phase liquid flows out, and therefore, the collection rate of the light phase liquid can be improved, and waste is reduced.

Description

technical field [0001] The invention relates to the technical field of phase separation equipment, in particular to a phase separation device for the production of 2-methyl-5-pyrazinecarboxylic acid. Background technique [0002] 2-Methyl-5-pyrazinecarboxylic acid in concentrated sulfuric acid is extracted by anhydrous methyl ethyl ketone, and then the centrifugal extractor is used for liquid-liquid phase separation. At present, the working principle of the centrifugal extractor on the market is roughly as follows: heavy phase The mixed liquid formed after mixing with the light phase enters the drum, and driven by the drum, the mixed liquid and the drum rotate synchronously at high speed to generate centrifugal force. Under the action of centrifugal force, the heavy phase with higher density gradually moves away from the center of the drum and leans toward the drum wall during the upward flow; the light phase with lower density gradually moves away from the drum wall and tow...

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Problems solved by technology

[0004] But the above-mentioned invention has the following deficiencies: after the liquid is added in the outer cylinder, the liquid is mixed by the rotation of the inner cylinder, and the mixed liquid is mixed with the heavy phase liquid and the light phase liquid in the rotating cylinder by the action of centrifugal force. Separation, although most of the heavy phase liquid can be separated from the light phase liquid in this way, but with the reduction of the light phase, a small part of the light phase cannot be discharged from the light phase outlet, resulting in a small part of the light phase and the heavy phase liquid. out together

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