Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1992-03-06
1994-06-07
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210653, 210654, 95 16, 95 17, B01D 6100
Patent
active
053187067
ABSTRACT:
A method of preparing hydrofluoric acid of high purity at the point of use by causing molecular diffusion of hydrogen fluoride into ultrapure water through a resin membrane. The high-purity acid is available at the site of use free of contamination that would occur during transport from a site of preparation.
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Hirayama Ryozi
Maeno Matagoro
Miki Nobuhiro
Ohmi Tadahiro
Fortuna Ana M.
Hashimoto Chemical Co. Ltd.
Spear Frank
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