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Introduced by centrifugal extraction machine for pharmaceutical intermediates extraction process

by:Deyuan      2020-09-07
Pharmaceutical intermediates production shall be carried out using centrifugal extraction machine, such as furan oxime acid ( 2 - methoxyl and amino - 2 - furan acetic acid) The extraction separation, solvent extraction method is used to best effect.

furan oxime acids are important intermediates for synthesis of cephalosporin antibiotics cefuroxime, synthesis method is the use of acetyl furan as starting materials, oxidized by sodium nitrite acid, methyl oxygen hydrochloride in oxime and organic solvent extraction and distillation. In the process of preparation, choose suitable extractant, the. cwl - M centrifugal extraction machine for extraction separation.

the first quantitative methylene chloride and adjusted the pH value of synthetic fluid respectively in advance through the different entrance injection machine, centrifugal extraction material liquid in the mixed zone, with the aid of the rotation of the drum, through the turbine disc and the impeller to make two phase mixing and dispersing quickly, two phase solution fully mass transfer, mixing and mass transfer process. Mixes the material liquid under the action of vortex disk into the rotary drum, in under the action of centrifugal force, two phase separation, clarification of two phase fluid end respectively through their weir plate into the collection chamber and the tube was closed to derivation, respectively, to complete the two phase separation process.

in the process of extraction, furan oxime acid is organic acid, pH value has a great influence on the extraction. Under the low pH value for furan oxime acid in organic phase distribution. So choose the appropriate pH value, is not only beneficial to improve the furan oxime acid extraction rate, can also according to coexistence impurities and partition coefficient, improve the furan oxime acid extraction selectivity. Join in extraction process itself does not dissolve in water phase was extracted nor complexation with metal ions of inorganic salt as salting-out agent, increase the concentration of being in the water extraction, extraction.

in the operation process, extraction,. cwl - zhengzhou days M centrifugal extraction machine played an important role. The equipment is my company independent research and development and production, the patent number: ZL2014205865573. The series centrifugal extraction machine level reserved time is short, split phase quickly, high extraction efficiency, save the investment cost and solvent recycling fee, widely used in various industries of extraction separation operation.

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