4. Separation and Purification of Vanadium
and Molybdenum by Solvent Extraction Followed by Reductive Stripping
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 23(2), 208-213 (1990)
5. Mechanism of Extraction of Cobalt from
Hydrochloric Acid by Tri-n-octylmethylammonium Chloride
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 24(1), 58-62 (1991)
6. Electro-reductive Stripping of Vanadium in
Solvent Extraction Process for Separation of Vanadium and Molybdenum
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 24(1), 124-125 (1991)
7. Extraction of Vanadium(V) from
Hydrochloric Acid by Tri-n-octylmethylammonium Chloride
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 24(3), 301-305 (1991)
8. Extraction and Separation of Rare-Earth
Elements by Tri-n-octylmethylammonium Nitrate and -Diketone using
Water-Soluble Complexing Agent
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 24(6), 731-736 (1991)
9. Synergistic Extraction of Rare-Earth
Elements by Alkyl Phosphoric Acid and Tri-n-octylmethylammonium Nitrate
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 25(2), 218-220 (1992)
11. Separation of Europium from Samarium and
Gadolinium by Combination of Electrochemical Reduction and Solvent Extraction
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 25(6), 644-648 (1992)
12. Separation of Europium from Samarium and
Gadolinium by Combination of Photochemical Reduction and Solvent Extraction
Takayuki
Hirai, Naohisa Onoe and Isao Komasawa
J.
Chem. Eng. Japan, 26(1), 64-67 (1993)
13. Electro-Reductive Stripping of Vanadium in
Solvent Extraction Process for Separation of Vanadium and Molybdenum using Tri-n-octylmethylammonium
Chloride
Takayuki
Hirai and Isao Komasawa
Hydrometallurgy,
33, 73-82 (1993)
14. Photoreductive Stripping of Vanadium in
Solvent Extraction Process for Separation of Vanadium and Molybdenum
Takayuki
Hirai, Naohisa Onoe and Isao Komasawa
J.
Chem. Eng. Japan, 26(4), 416-421 (1993)
15. High-performance Separation Process of Eu
from Sm/Eu/Gd Mixture by Liquid-Liquid Extraction Combined with Photoredox
Reaction
Takayuki
Hirai, Naohisa Onoe and Isao Komasawa
Bunseki
Kagaku, 42(11), 681-686 (1993)
19. Extraction and Separation of Molybdenum and
Vanadium Using Bis(2-ethylhexyl)monothiophosphoric Acid and
Bis(2-ethylhexyl)phosphoric Acid
Takayuki
Hirai, Takuji Hashimoto, Izumi Tsuboi, Akira Hino and Isao Komasawa
J.
Chem. Eng. Japan, 28(1), 85-90 (1995)
20. Separation of Eu from Sm/Eu/Gd Mixture by
Photoreductive Stripping in Solvent Extraction Process
Takayuki
Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 34(1), 237-243 (1995)
23. The Effect of Formic Acid on Photoreductive
Stripping of Vanadium in Liquid-Liquid Extraction Process of Vanadium and
Molybdenum
Takayuki
Hirai, Tadashi Manabe and Isao Komasawa
J.
Chem. Eng. Japan, 28(4), 486-488 (1995)
26. Separation of Ce from La/Ce/Nd Mixture by
Photooxidation and Liquid-Liquid Extraction
Takayuki
Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 29(4), 731-733 (1996)
28. Acidic Phosphinates with Different Alkyl
Groups as Extractants for Rare Earths
Akira
Hino, Takayuki Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 29(6), 1041-1044 (1996)
35. Photoreductive Stripping of Vanadium Using
2-Propanol as Radical Scavenger in Liquid-Liquid Extraction Process of Vanadium
and Molybdenum
Takayuki
Hirai, Tadashi Manabe and Isao Komasawa
J.
Chem. Eng. Japan, 30(2), 268-273 (1997)
37. Practical Study of Liquid-Liquid Extraction
Process for Separation of Rare Earth Elements with Bis(2-ethylhexyl)phosphinic
Acid
Akira
Hino, Syouhei Nishihama, Takayuki Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 30(6), 1040-1046 (1997)
42. Recovery of Phosphorus Value from
Incineration Ashes of Sewage Sludge Using Solvent Extraction
Akira
Hino, Takayuki Hirai and Isao Komasawa
Kagaku
Kogaku Ronbunshu, 24(2), 273-278 (1998)
47. Extraction and Separation of Gallium and
Indium from Aqueous Chloride Solution Using Several Organophosphorus Compounds
as Extractants
Syouhei
Nishihama, Akira Hino, Takayuki Hirai and Isao Komasawa
J.
Chem. Eng. Japan, 31(5), 818-827 (1998)
52. Separation and Recovery of Gallium and
Indium from Simulated Zinc Refinery Residue by Liquid-Liquid Extraction
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 38(3), 1032-1039 (1999)
61. Mechanism of Photoreductive Stripping of
Iron(III) in a Liquid-Liquid Extraction System and Its Application for a
Hydrometallurgical Process
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 38(12), 4850-4856 (1999)
65. Extraction and Separation of Heavy Rare
Earth Metals in the Presence of Diethylenetriaminepentaacetic Acid
Syouhei
Nishihama, Nobuya Sakaguchi, Takayuki Hirai and Isao Komasawa
Solv.
Extr. Res. Dev. Japan, 7, 159-166 (2000)
68. Design of Liquid-Liquid Extraction Process
for Separation of Metal Ions
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Kagaku
Kogaku Ronbunshu, 26(4), 497-505 (2000)
70. Mechanism of Photoreductive Extraction of
Vanadium in a Liquid-Liquid Extraction System Using Bis(2-ethylhexyl)phosphoric
Acid
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 39(8), 3018-3023 (2000)
74. Selective Extraction of Y from a Ho/Y/Er Mixture
by Liquid-Liquid Extration in the Presence of a Water-Soluble Complexing Agent
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 39(10), 3907-3911 (2000)
77. Photoreductive Stripping of Cobalt Loaded on
Hydroxyoxime Extractant in a Liquid-Liquid Extraction System
Syouhei
Nishihama, Nobuya Sakaguchi, Takayuki Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 39(12), 4986-4990 (2000)
84. High Functional Liquid-Liquid Extraction
System Using Photochemical Reduction for Metal Ions
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Solv.
Extr. Res. Dev. Japan, 8, 172-185 (2001)
87. Review of Advanced Liquid-Liquid Extraction
System for the Separation of Metal Ions by a Combination of Conversion of Metal
Species with Chemical Reaction
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
Ind.
Eng. Chem. Res., 40(14), 3085-3091 (2001)
97. Extraction and Separation of Rare Earth
Metals Using Microcapsules Containing Bis(2-ethylhexyl)phosphinic Acid
Syouhei
Nishihama, Nobuya Sakaguchi, Takayuki Hirai and Isao Komasawa
Hydrometallurgy,
64(1), 35-42 (2002)
113. Advanced Liquid-Liquid Extraction Systems for
the Separation of Rare Earth Ions by Combination of Conversion of the Metal
Species with Chemical Reaction
Syouhei
Nishihama, Takayuki Hirai and Isao Komasawa
J.
Solid State Chem., 171(1-2), 101-108 (2003)
121. Separation and Recovery of Cr(VI) from Simulated Plating
Waste Using Microcapsules Containing Quaternary Ammonium Salt Extractant and
Phosphoric Acid Extractant
Syouhei
Nishihama, Go Nishimura, Takayuki Hirai, and Isao Komasawa
Ind.
Eng. Chem. Res., 43(3), 751-757 (2004)