METHOD FOR PURIFYING 1,1-BIS(4'-HYDROXY-3'-METHYLPHENYL)CYCLOHEXANE AND METHODS OF PRODUCING POLYCARBONATES THEREFROM

A method for purifying 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane comprises dissolving said 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane in a first solvent consisting essentially of an alcohol to form a first solution; filtering said first solution; adding a second solvent...

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Bibliographische Detailangaben
Hauptverfasser:	SHYADLIGERI, ASHOK, KRISHNAMURTI, RAMESH, RADHAKRISHNA, A., S, SRINIVASAN, VEERARAGHAVAN, KAPILA, DEBJANI, DAVIS, GARY, C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	A method for purifying 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane comprises dissolving said 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane in a first solvent consisting essentially of an alcohol to form a first solution; filtering said first solution; adding a second solvent consisting essentially of water to the filtered first solution to form a second solution, wherein said second solution comprises about 40 parts to about 95 parts of the first solvent per 100 parts of the combined weight of the first and second solvents; crystallizing said 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane from said second solution to form a first crystalline product; dissolving said first crystalline product in a third solvent to form a third solution, wherein the third solvent comprises an aromatic compound; and crystallizing said 1,1-bis(4'-hydroxy-3'-methylphenyl)cyclohexane from said third solution to produce a second crystalline product. L'invention concerne un procédé de purification de 1,1-bis(4'-hydroxy-3'-méthylphényl)cyclohexane. Ledit procédé consiste à dissoudre ledit 1,1-bis(4'-hydroxy-3'-méthylphényl)cyclohexane dans un premier solvant sensiblement constitué d'un alcool afin de former une première solution ; à filtrer ladite première solution ; à ajouter un deuxième solvant sensiblement constitué d'eau à la première solution filtrée afin de former une deuxième solution, ladite deuxième solution comprenant entre environ 40 parties et environ 95 parties du premier solvant pour 100 parties du poids combiné des premier et deuxième solvants ; à cristalliser ledit 1,1-bis(4'-hydroxy-3'-méthylphényl)cyclohexane de ladite deuxième solution afin de former un premier produit cristallin ; à dissoudre ledit premier produit cristallin dans un troisième solvant afin de former une troisième solution, le troisième solvant comprenant un composé aromatique ; et à cristalliser ledit 1,1-bis(4'-hydroxy-3'-méthylphényl)cyclohexane de ladite troisième solution afin de produire un second produit cristallin.