Chemistry of inorganic compounds – Hydrogen or compound thereof – Elemental hydrogen
Reexamination Certificate
2006-07-19
2008-10-28
Nguyen, Ngoc-Yen M (Department: 1793)
Chemistry of inorganic compounds
Hydrogen or compound thereof
Elemental hydrogen
C423S481000, C423S486000, C423S522000, C423S658200, C423S652000
Reexamination Certificate
active
07442363
ABSTRACT:
A hydrogen iodide manufacturing method which includes a step of producing aqueous solution of hydrogen iodide and sulfuric acid by causing iodine-containing aqueous solution and sulfur dioxide to react with each other in a pressurized condition. The pressurized condition may be of not lower than 0.1 MPa in gauge pressure. The method may further include: a separation step of adding iodine to the aqueous solution of hydrogen iodide and separating an upper phase containing sulfuric acid relatively to a large extent and a lower phase containing hydrogen iodide relatively to a large extent; and a step of producing hydrogen iodide by adding sulfur dioxide to the upper phase in a pressurized condition and extracting the produced hydrogen iodide to the lower phase.
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Jimbo Noboru
Murakami Kazuo
Nakamura Hideki
Takahashi Ryouta
Takase Haruhiko
Kabushiki Kaisha Toshiba
Nguyen Ngoc-Yen M
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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