| 摘要 |
<p>The invention relates to a process for obtaining 2,6-di-tert-butyl-4-methylphenol phenolic antioxygen, used as additive for preserving food and rubber items. According to the invention, the process consists in that there is subjected to reaction a p-cresol and MTBE mixture, of 99% purity, at a MTBE:para-cresol molar ratio of 2.1:1, in the presence of mixed solid catalyst, consisting of highly acid ion exchange resin and tri-calcium phosphate, at a temperature of 75...120A C and a 1 bar pressure, for 5 h, afterwards the desired product is separated from the reaction mass by crystallization.</p> |
