Abstract: A process for continuously producing 2,2-bis(4-hydroxyphenyl) propane having a high quality from a reaction of phenol and acetone in the presence of a hydrochloric acid containing catalyst comprising the steps of:(A) carrying out the reaction by continuously charging additional phenol, the below-mentioned circulating phenol, additional acetone, additional hydrogen chloride or hydrochloric acid, the below-mentioned circulating oily mother liquor, and the below-mentioned aqueous mother liquid into a reactor to form a reaction mixture slurry comprising the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane in the form of crystal and two liquid phase reaction mother liquors of an oily mother liquor and an aqueous mother liquor;(B) separating the reaction mixture slurry into the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane and the two liquid phase mother liquors after discharging the reaction mixture slurry from the reactor;(C) separating the two liquid phase mother liquors obtained in the above-me

Abstract: In an improved process for recovering a phenolic compound, the improvement comprising, subjecting a phenolic containing fraction recovered overhead in an extractive distillation, to a subsequent steam distillation; recovering the phenolic product as a bottoms fraction therefrom, and recycling such product to some point upstream in the process.

Abstract: In a process for producing a phenolic compound which comprises treating an aralkyl hydroperoxide with a mineral acid to cleave it to phenolic compound and a ketone, neutralizing or removing the mineral acid, feeding the resulting acid cleavage mixture containing the salt to a distillation column, distilling it therein to separate it into an overhead fraction consisting mainly of the ketone and a bottom fraction consisting mainly of the phenolic compound, and recovering the phenolic compound from the bottom fraction; the improvement which comprises withdrawing a liquid layer from a site of feeding the acid cleavage mixture in the distillation column or from a site below it but above the bottom of the distillation column, subjecting the liquid layer to an oil-water separating means, recycling the separated oil layer to a site below said site of withdrawal, optionally feeding a hydrocarbon having a lower boiling point than the phenolic compound but a higher boiling point than the keton and/or water to the distil

Abstract: An image forming system includes a first storage unit that stores identification information and storage information with the identification information mapped to the storage information, the identification information identifying a user, the storage information indicating a storage location where image data corresponding to the identification information is stored, an identifying unit that, in response to the identification information input by the user, identifies the storage location indicated by the storage information stored on the first storage unit with the identification information mapped thereto, a retrieval unit that retrieves, from the storage location identified by the identifying unit, the image data corresponding to the identification information, and an image forming unit that forms an image responsive to the image data retrieved by the retrieval unit.