PROCESS FOR MAKING ALKOXYLATED PIPERAZINE COMPOUNDS

摘要

The present invention relates to an improved process for making mono- and di-alkoxylated piperazine compounds especially dihydroxyethylpiperazine. The improvement comprises the addition of an acid to the piperazine compound prior to the addition of an alkylene oxide to a reactor wherein the alkoxylated piperazine compound is prepared. Said improvement reduces the concentration of undesirable glycol ether byproducts which contribute undesirable color and foaming of the alkoxylated piperazine compounds.

主权项

1. In a process and under conditions for making an alkoxylated piperazine compound from the reaction of an alkylene oxide and a piperazine compound wherein undesirable glycol ether byproducts are formed, the improvement which comprises the addition of an acid to a reaction mixture comprising a piperazine compound prior to the addition of an alkylene oxide to a reactor wherein the alkoxylated piperazine compound is prepared.