A process for preparing tetrakis (3-(3,5-dibutyl-4-hydroxyphenyl)propionyloxymethyl)methane.

摘要

Tetrakis [3- (3,5- dibutyl-4-hydroxyphenyl) propionyloxymethyl] methane having a high purity and excellent whiteness is prepared. In this process, an ester exchange reaction between a propionic acid ester having the general formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="16" wi="61" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein Bu is an n-, sec-, iso-, or tert-butyl group and R<Sup>1</Sup> is an alkyl group having 1 to 4 carbon atoms, and pentaerythritol in the presence of an alkaline catalyst is effected by adding 0.2 through 1.8 mol of water based on 1 mol of the alkaline catalyst by the substantial completion of the ester exchange reaction.