separation by crystallization

Method: Fasidotril was synthesized from piperonylacrylic acide through addition, separation, condensation reactions and by crystallization.

方法: 以胡椒丙烯酸为原料,经加成 、 拆分 、 缩合反应以及结晶分离,制得法西多曲.

The separation of alanine by emulsion liquid membranes in laboratory scale is studied, thus explores a new way for recovery of alanine from the "secondary isoelectric point crystallization" mother liquid in the production process of gourmet powder.

对乳化液膜技术分离丙氨酸进行了实验研究，从而探索了从味精生产过程的第二次等电点结晶母液中回收丙氨酸的新途径。

The separation of tungsten and cobalt by use of disused hard alloy anvil as materials and adopting alkali fusion method, roasting, digestion hydrolytic decomposition and crystallization is introduced, as well as the technique of production and principle of 12-phosphoric tungsten acid.

介绍了以废硬质合金顶锤为原料，采用碱熔法处理，结合焙烧、浸取、水解、结晶等方法，分离钨和钴，然后制取12-磷钨酸的原理和生产工艺。