| 摘要 |
PROBLEM TO BE SOLVED: To provide an acid concentrating method excellent in operability and economical efficiency and enhanced in the concentration efficiency of an acid. SOLUTION: The acid concentrating method is characterized in that a waste acid solution containing Al is pressurized to be supplied to a pressure dialyzer 1, which has a charged separation membrane 2 having micropores of a nanometer unit of preferably 0.1-10 nm, mounted therein and dialyzed by the separation membrane 2 to concentrate the acid in the waste acid solution. COPYRIGHT: (C)2011,JPO&INPIT |
