| 摘要 |
<p>A process for the reduction of the concentration of aldehyde(s) and/or ketone(s) in an aqueous waste stream comprises the steps of treating an aqueous waste stream with an effective amount of an organic polyamine base. In addition, a process of making a polyester or polyol comprises treating the aldehyde(s) and/or ketone(s) with organic polyamine base compounds to remove at least 50 % of the aldehyde(s) and/or ketone(s) from the aqueous waste stream. Further, a process of making poly(trimethylene dicarboxylate) comprising reacting 1,3-propanediol with at least one dicarboxylic acid or lower dialkyl esters thereof comprises treating the aqueous waste stream using a nitrogen-containing base selected from the group consisting of organic polyamines and inorganic ammonium compounds.</p> |
