| 主权项 |
1. A process for decreasing the production of undesirable glycol ether byproducts in the alkoxylation of a piperazine compound by reaction with an alkylene oxide, wherein the piperazine compound has the formula: wherein R, R1, R2, R3, R4, R5 R6, R7, R8, and R9 are each independently hydrogen, an alkyl group, aryl group, —(CH2—CH2—O)n—H wherein n is an integer from 0 to 8, an hydroxyalkyl group, an aminoalkyl group where the nitrogen can be part of a 5 or 6 ring membered cycle, an alkylene group containing quaternary ammonium, a carboxylic acid and/or a salt thereof, or a sulphonic acid and/or a salt thereof, with the proviso that at least one of R and R1 is a hydrogen; which process comprises adding an acid to a reaction mixture comprising the piperazine compound prior to the addition of the alkylene oxide to a reactor wherein the alkoxylated piperazine compound is prepared. |
