申请人:——
公开号:US20020010373A1
公开(公告)日:2002-01-24
The invention relates to a process for purifying a crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate containing an impurity. The process includes bringing the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate into contact with a poor solvent in which 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate is substantially insoluble, thereby removing the impurity from the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate. Alternatively, the process includes precipitating crystals of 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate from a solution of the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate. Thus, it is possible to produce 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate of high purity. This product makes it easy to produce 1,1,1,5,5,5-hexafluoroacetylacetone of high purity.
本发明涉及一种用于纯化含有杂质的粗1,1,1,5,5,5-六氟乙酰乙酮二水合物的工艺。该工艺包括将粗1,1,1,5,5,5-六氟乙酰乙酮二水合物与一种贫溶剂接触,其中1,1,1,5,5,5-六氟乙酰乙酮二水合物在其中基本不溶,从而从粗1,1,1,5,5,5-六氟乙酰乙酮二水合物中去除杂质。或者,该工艺包括从粗1,1,1,5,5,5-六氟乙酰乙酮二水合物的溶液中沉淀出1,1,1,5,5,5-六氟乙酰乙酮二水合物的晶体。因此,可以生产高纯度的1,1,1,5,5,5-六氟乙酰乙酮二水合物。该产品使得生产高纯度的1,1,1,5,5,5-六氟乙酰乙酮变得容易。