Open AccessIn-line System to Produce High-Purity Acid Solutions
Author(s) -
Hiroto Masunaga,
Yuji Higo,
Mizuo Ishii,
Noboru Maruyama,
Shigeo Yamazaki
Publication year - 2016
Publication title -
analytical sciences
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.32.695
Subject(s) - chemistry , electrolysis , membrane , electrokinetic phenomena , ion exchange , cationic polymerization , electrode , electrochemistry , ion , impurity , inorganic chemistry , electrolyte , ion exchange membranes , chemical engineering , polymer chemistry , organic chemistry , biochemistry , engineering
Herein, we report a new device that generates a high-purity acid solution. It comprises three compartments divided by anion-exchange membranes and filled with ion-exchange resins. Fluorochemical cation-exchange membranes, which tolerate electrochemical wear and permit bulk flow, are inserted between each electrode and the anion-exchange resin. A bipolar boundary is a composite boundary comprising anion and cation exchangers. This device has four bipolar boundaries to separate the location of acid generation from the location where water is electrolyzed. It can tolerate high pressures, resist degradation due to electrolysis at the electrodes, and produce high-purity acid solutions that are free from gases and cationic impurities. The acid solution is generated on the basis of an electrokinetic phenomenon at the surfaces of ion-exchange resins and membranes in an electric field; its concentration can be controlled at rates from 0.01 to 100 μmol/min by adjusting the electrical current applied to the device.