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OwnerAdalat V. O. Ragimov, Yavus I. O. Rustamov +4inventors
InventorsAdalat V. O. Ragimov, Yavus I. O. Rustamov, Ibragim I. O. Ragimov, Anush G. K. Mamedova, Tadzhaddin S. O. Zakirov, Amrulla F. O. Amrullaev
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A process for preparing polyphenols, including oxidative polycondensation of a phenol in an aqueous medium in the presence of an oxidizer as well as a subsequent separation of the end product. The starting phenol is mixed with an aqueous solution of an alkali of 5 to 56% concentration in a molar ratio between 1:2.4 and 1:0.25 and heated to a temperature between 70.degree. and 170.degree. C., while air, which furnishes oxygen as the oxidizer, is passed through the reaction mixture. An apparatus for carrying out the process of the invention comprises a kettle equipped with a heater, a shaft with blades mounted within said kettle and connected to a drive for revolving the shaft, a perforated pipe assembled at the bottom portion of the kettle and communicating with an air blower. The perforated pipe communicates with the air blower through an air treatment chamber.
Method for the polycondensation of phenolic monomers, which comprises heating a mixture of a polymerizable phenolic monomer in an aqueous solution of an alkali of a concentration of 5-56% and having a molar ratio of phenolic monomer to alkali of 1:2.4-1:0.25 to a temperature of 70.degree.-170.degree. C., said phenolic monomer being phenol, alkyl (C.sub.8 H.sub.17) phenol, cresol, alpha-naphthol, beta-naphthol or hydroquinone, and passing air through the thus heated mixture to effect polycondensation of phenolic monomer to form the corresponding polymer of said phenolic monomer.
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