PREPARATION OF TETRAESTER OF PENTAERYTHRITOL HAVING A LOW ACID VALUE AND A SMALL TIME-LAPSE CHANGE OF THE ACID VALUE

摘要

The present invention provides a preparation method of tetraester of pentaerythritol, which comprises the following steps of: (1) enabling pentaerythritol, a fatty acid, or ester thereof to react under existence of an acid catalyst; (2) neutralizing the acid catalyst by adding hydrotalcite to a reaction mixture that is resulted; and (3) filtering the resulted reaction mixture. According to the present invention, the preparation method can provide tetraester of pentaerythritol having a low acid value and a small time-lapse change of the acid value with great quality, and further, can be applied to technological mass production by being improved to be more economical and eco-friendly.