美国本德研究公司的附属公司阶式分离公司开始销售一种不需像共沸蒸镏或萃取蒸镏法那样耗费资金和能源就能分离有机化合物与水的共沸混合物的膜。在试验中 ,此膜曾处理过醇、酮、酯和醚。首批膜分离装置用于半导体制造生产含水率低于 5× 1 0 - 5的超纯异丙醇( IPA)。另一已获 A subsidiary company of Bend Research, Inc., began selling a membrane that separates the azeotrope of organic compounds from water without the expense of energy and azeotrope distillation. In experiments, the film had treated alcohols, ketones, esters and ethers. The first batch of membrane separators was used in the manufacture of semiconductors to produce ultrapure isopropyl alcohol (IPA) with a moisture content of less than 5 × 10 ~ 5. Another has been obtained