129188-99-4Relevant articles and documents
BISPHENOL COMPOSITION CONTAINING AROMATIC ALCOHOL SULFONATE AND METHOD FOR PRODUCING SAME, POLYCARBONATE RESIN AND METHOD FOR PRODUCING SAME, AND BISPHENOL PRODUCTION METHOD
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, (2020/07/07)
A bisphenol composition including a specific amount of aromatic alcohol sulfonate, and a simple method of producing it are provided. Also provided is a method of producing a polycarbonate resin in which, by using the bisphenol composition including a specific amount of aromatic alcohol sulfonate, melt polymerization reaction can be efficiently allowed to proceed to produce a polycarbonate resin having an excellent color tone. A bisphenol composition including an aromatic alcohol sulfonate at not less than 0.1 ppb by mass with respect to a bisphenol. A method of producing a bisphenol composition, including reacting a ketone or an aldehyde with an aromatic alcohol in the presence of sulfuric acid to produce a bisphenol composition. A method of producing a polycarbonate resin, including producing a polycarbonate resin using the bisphenol composition. A polycarbonate resin including a specific amount of aromatic alcohol sulfonate.
Method of producing pure 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane
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Page/Page column 4, (2010/02/12)
A method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane comprising: crystallizing a phenol adduct of 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane from a solution comprising 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and phenol; washing the phenol adduct with a washing solution comprising phenol and water; decomposing by heating the washed phenol adduct in an aqueous solvent to remove phenol from the phenol adduct, thereby obtaining pure 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.
Method for producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane
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Page column 8-10, (2010/02/05)
The invention provides a process for production of high purity 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (BPTMC) which comprises: (a) a reaction step wherein phenol is reacted with 3,3,5-trimethylcyclohexanone (TMC) in a slurry containing phenol adduct crystals of BPTMC in the presence of an acid catalyst; (b) a neutralization step wherein after the reaction, the resulting reaction mixture in the form of slurry is neutralized with an alkali while heating to convert the slurry to a solution; (c) a primary crystallization and filtration step wherein the resulting solution is cooled and the resulting phenol adduct crystals of BPTMC are collected by filtration; (d) a secondary crystallization and filtration step wherein the adduct crystals obtained in the primary crystallization and filtration step are heated in a crystallization solvent to dissolve the crystals therein to prepare a solution and then the solution is cooled to crystallize BPTMC out of the solution, followed by collecting the crystals of BPTMC by filtration; (e) a filtrate recycling step wherein at least a part of the secondary crystallization filtrate obtained in the secondary crystallization and filtration step is returned to the reaction step. The process provides uncolored high purity BPTMC in high selectivity and in high yield in an industrially stable manner which is substantially free from residual phenol and trace impurities such as sodium, chlorine and sulfur and hence which is suitable for use as raw materials for the production of resins for optical use.