申请人:THE DOW CHEMICAL COMPANY
公开号:EP0421794A2
公开(公告)日:1991-04-10
2-Piperazinones suitable as a regenerable sulfur dioxide absorbing medium are made by reacting a 1-cyano-1-hydroxyalkane with ethylenediamine or a substituted ethylenediamine in aqueous solution. The cyano compound is present in at least a molar equivalent amount to the diamine and the resulting 2-piperazinone product is sparged with an inert gas.
适用于可再生二氧化硫吸收介质的 2-哌嗪酮是通过在水溶液中使 1-氰基-1-羟基烷烃与乙二胺或取代乙二胺反应制成的。氰基化合物的存在量至少与二胺的摩尔当量相当,并用惰性气体对生成的 2-哌嗪酮产品进行喷射。