A kind of phase separation device for the production of 2-methyl-5-pyrazinecarboxylic acid

Abstract

The invention discloses a phase-separating device for the production of 2-methyl-5-pyrazinecarboxylic acid, relates to the technical field of phase-separating equipment, and comprises a fixing frame, and a mounting hole is opened in the middle of the top of the fixing frame, and the mounting hole is A centrifugal cylinder is fixed on the inner wall of the centrifugal cylinder, and a drum is arranged inside the centrifugal cylinder. A fixed ring plate is fixed on the top position of the inner peripheral wall of the centrifugal cylinder, and a rotating ring plate is installed on the inner ring of the fixed ring plate. The inner ring of the rotating ring plate is fixed on the outer peripheral wall of the rotating shaft. When the extraction time set by the single-chip microcomputer of the present invention is reached, the second electromagnetic valve is opened and the first electromagnetic valve is closed. At this time, the light phase liquid gradually flows out, and the inert gas slowly returns to the anti-permeation rubber sleeve, and the anti-infiltration rubber sleeve gradually expands. Then continuously push the light phase tube to move gradually so that it can be in contact with the light phase liquid all the time until the light phase liquid flows out completely, which can increase the collection rate of the light phase liquid and reduce waste.

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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