Method for purifying cyclic compounds

JP7669674B2Active Publication Date: 2025-04-30SUMITOMO BAKELITE CO LTD
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Patent Information

Application Number
JP2020199605
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-12-01
Publication Date
2025-04-30
Estimated Expiration
2040-12-01

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Abstract

To provide a purification method of a cyclic compound, with which a high-purity cyclic compound can be taken out even when concentration of a raw material is low.SOLUTION: A purification method of a cyclic compound of the invention is characterized as having: a pH adjusting step to adjust pH of a raw material liquid including the cyclic compound before purification with an acid dissociation constant pKa of 9-20 and water to a value in a range of 10-12 so as to obtain a pH adjusted solution; an extraction step to subject the pH adjusted solution to a liquid-liquid extraction treatment using an organic solvent so as to obtain an extract including the cyclic compound and the organic solvent; and a distillation step to subject the extract to a distillation treatment so as to take out the cyclic compound after purification.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

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    JP2008174482A

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