Seitetsu Kagaku Co., Ltd.

Takeo Tanabe

Masahiro Inoue

Saburo Hayashi

Masaru Uno

Masakatsu Hiraoka

Satoshi Ihara

Hiroo Tsuchiya

Mitsukazu Mukai

Akira Otsuji

A process for the removal and recovery of mercury and, if desired, other heavy metals from incinerator waste water produced by washing waste gases from incinerators, which comprises adding to the waste water a reducing agent or a combination of oxidizing and reducing agents, subjecting the thus added waste water to stripping treatment in the presence of ferrous ion to obtain a mercury vapor-containing gas and simultaneously form spinel type crystalline compounds and then cooling said gas to separate and recover the mercury. If desired, said spinel type crystalline compounds are also removed from the mercury-free waste water.

Process for removal of mercury from waste water

A process for separating and recovering carbonic acid gas from a methane-rich gas containing the same by a pressure swing means comprising contacting the methane-rich gas with an adsorbent for carbonic acid gas at a high pressure to obtain a refined methane gas and then desorbing the carbonic acid from the carbonic acid gas-adsorbed adsorbent at a low pressure to obtain a substantially pure carbonic acid gas.

Process for separating carbonic acid gas from methane-rich gas

Growing community of inventors

Nara, Japan

Takeo Tanabe