PROCESS FOR PRODUCING EUTECTIC MIXTURES OF P-HYDROXYBENZOIC ACID ESTERS

摘要

The invention relates to a process for the preparation of EUTECTIC MIXTURES OF P-HYDROXYBENZOIC ACID ESTERS. It is possible to form these EUTECTIC MIXTURES IN SITU by first reacting an ACID. HYDROXYBENZOIC AND A LOWER ALKANOL IN THE PRESENCE OF AN ESTERIFICATION CATALYST TO FORM A FIRST ALKYL ESTER LOWER OF P-HYDROXYBENZOIC ACID, BY REACTING THE RESULTING MIXTURE WITH TWO OR MORE TWO LOWER HOT ALKANOLS TO FORM A MIXTURE OF THREE OR MORE THAN THREE ALKYL ESTERS LOWER THAN P-HYDROXYBENZOIC ACID, WHICH DISABLE THE REACTIONAL MIXTURE WHEN THE PROPORTION OF THE CORRESPONDING ALKYL SUPERIOR ESTHETIC MATTERS OF THE P-HYDROXYBENZOIC ACID IS SUCH AS THEIR MIXTURE IS IN THE FORM OF A FLUID LIQUID. AMBIENT TEMPERATURE AND ISOLATING THE EUTECTIC MIXTURE RESULTING. / P P ALKYL ESTERS OF P-HYDROXYBENZOIC ACID SUCH AS ISOPROPYL, ISOBUTYL AND N-BUTYL P-HYDROXYBENZOATES ARE USEFUL AS AGENTS NTI-MICROBIAL. / P