| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for recovering acid using an inorganic separation membrane. <P>SOLUTION: A zeolite membrane containing zeolite in which the molar ratio of SiO<SB POS="POST">2</SB>/Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>is not less than 5 is used when recovering acid in which an acid-water mixture is supplied and concentrated to a separation membrane module containing an inorganic porous support-zeolite membrane composite having the zeolite membrane at the inorganic porous material support surface as the separation membrane. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
