Patent ID: 9108911
Filing Date: 2015-08-18
Classification: C07C,C07D

Abstract:
1. A method of making di-TMP comprising: (a) reacting TMP and a dialkyl carbonate in the presence of a base catalyst in a reaction medium to form an oxetane of TMP in the reaction medium; (b) removing intermediate dialkyl carbonate derived byproducts from the reaction medium and optionally removing any unreacted dialkyl carbonate present; (c) providing an acid catalyst and additional TMP to the reaction medium and reacting the oxetane formed in step (a) in situ with TMP to produce di-TMP; and (d) recovering di-TMP, with the further proviso that at least one of the following conditions are met: (i) said acid catalyst is a strong acid catalyst or (ii) said base catalyst is a strong base catalyst; or (iii) the molar ratio of TMP/dialkyl carbonate employed in the method is greater than 2.5.