24197-34-0Relevant articles and documents
METHOD OF PRODUCING POLY(ORTHO-METHYLPHENOL)
-
Page/Page column 4, (2010/11/28)
Poly(ortho-methylphenol) is obtainable at high purities and yields using industrial processes by causing a secondary amine and formaldehyde to react with a polyphenol (first step), and then breaking down the aminomethyl group of the obtained poly(ortho-aminomethyl)phenol by means of hydrogenolysis in the presence of a hydrogenation catalyst (second step).
Method for manufacturing bisphenol
-
, (2008/06/13)
A method for manufacturing bisphenol by reacting phenols and ketones, characterized (1) in that an alkali metal compound and/or alkaline earth metal compound is added to bisphenol obtained by reacting a phenol and a ketone, and (2) in that the basicity of the bisphenol is adjusted so as to be equivalent to an amount of 1 × 10-8to 1 × 10-6moles of bisphenol as disodium salt with respect to 1 mole of bisphenol provides a bisphenol in which there is no residue of the organic catalysts ordinarily used in manufacturing bisphenol, so that byproducts are not produced during purification, allowing bisphenol with outstanding color tone, thermal resistance, etc., to be obtained.
Process of producing high purity bis(4-hydroxyphenyl)sulfides and heat-sensitive recording materials containing the same
-
, (2008/06/13)
In a process of producing high purity bis(4-hydroxyphenyl)sulfides which comprises reacting phenols with sulfur dichloride in an organic solvent, the improvement comprising: reacting the phenols with sulfur dichloride in a nonpolar organic solvent; removing partly or wholly the nonpolar organic solvent after the reaction; adding a polar organic solvent to the reaction mixture to dissolve the reaction mixture therein at elevated temperatures; and crystallizing out the high purity bis(4-hydroxyphenyl)sulfides. There is further provided a high performance heat-sensitive recording material which comprises high purity bis(4-hydroxy-3-methylphenyl)sulfide thus prepared and having a melting point in the range of from 123.9° C. to 124.9° C. as a developer and a fluoran compound as a color former.