发明授权
US5859296A Process for isolating hydroxypivalic acid from aqueous solution 失效
从水溶液中分离羟基新戊酸的方法

Process for isolating hydroxypivalic acid from aqueous solution
摘要:
Hydroxypivalic acid is obtained from aqueous solutions by removal of the water by azeotropic distillation and subsequent crystallization from a solvent mixture which is composed of a polar and a non-polar component. The distillation is carried out under reduced pressure and at a maximum bottom temperature of 90.degree. C., until a residual water content of at least 0.1% of the total weight of the resulting solution is achieved.
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