申请人:PBI Performance Products, Inc.
公开号:EP3653286A1
公开(公告)日:2020-05-20
A pervaporation membrane may be an acid-resistant polybenzidimazole (PBI) membrane. The acid-resistant PBI membrane may be a PBI membrane chemically modified by a process selected from the group consisting of sulfonation, phosphonation, cross-linking, N-substitution, and/or combinations thereof. The membrane may be thermally stabilized. A method for the dehydration of an acid material may include the steps of: contacting an acidic aqueous solution with a membrane of an acid-resistant polybenzidimazole; taking away a permeate stream rich in water; and taking away a concentrate steam rich in the acid material. The acidic aqueous solution may be acetic acid.
过蒸发膜可以是耐酸聚苯并咪唑(PBI)膜。耐酸 PBI 膜可以是通过磺化、磷化、交联、N-取代和/或其组合组成的组中所选工艺进行化学修饰的 PBI 膜。膜可以是热稳定膜。酸性物质的脱水方法可包括以下步骤:将酸性水溶液与耐酸聚苯并咪唑膜接触;带走富含水的渗透流;带走富含酸性物质的浓缩蒸汽。酸性水溶液可以是醋酸。