公开(公告)号：JP4031789B2

公开(公告)日：2008-01-09

申请号：JP2004339423

申请日：2004-11-24

Applicant: Agcエンジニアリング株式会社 ,  東レ株式会社 ,  高知県

Inventor： 敦 吉村 ,  義文 山▲崎▼ ,  弘之 山村 ,  浩久 川北 ,  洋 戸田 ,  和秀 浜田 ,  良雄 菅家 ,  隆 隅田 ,  良輔 青木

IPC: C02F1/469 ,  A23L1/304 ,  A23L2/38 ,  A23L2/52 ,  B01D61/02 ,  B01D61/44 ,  B01D61/58 ,  C02F1/44 ,  C05D3/00 ,  C05D5/00 ,  C05D11/00

CPC classification number: Y02A20/131 ,  Y02A20/134

Abstract: PROBLEM TO BE SOLVED: To provide a mineral liquid manufacturing method for obtaining, from sea water without heating it, mineral liquid having a sufficiently high concentration of mineral component such as magnesium and calcium and having a satisfactorily reduced sodium concentration. SOLUTION: The high-concentration mineral liquid manufacturing method comprises: a step (I) of separating sea water into concentrate (A1) and membrane permeate (A2) by treating sea water with a reverse osmosis membrane; a step (II) of obtaining concentrate (B1) in which cation concentration and monovalent anion concentration are high and bivalent or more anion concentration is low by treating the concentrate (A1) with an electrodialyzer constituted by disposing a pair of monovalent anion selective permeable anion exchange membrane and cation exchange membrane between anode and cathode; and a step (III) of obtaining concentrate (C1) as high-concentration mineral liquid in which bivalent or more cation concentration is high and monovalent cation concentration is low by treating the concentrate (B1) with an electrodialyzer constituted by disposing a pair of monovalent cation selective permeable cation exchange membrane and anion exchange membrane between anode and cathode. COPYRIGHT: (C)2006,JPO&NCIPI