公开(公告)号：EP2135664A4

公开(公告)日：2011-03-16

申请号：EP08721846

申请日：2008-03-05

Applicant: CHIYODA CORP

Inventor： KAWAMURA KAZUSHIGE ,  TAKEDA DAI ,  AWAI EIJI ,  KUMAGAI AKIRA

IPC: B01D53/50 ,  B01D53/34 ,  B01D53/64 ,  B01D53/77

CPC classification number: B01D53/1456 ,  B01D53/64 ,  B01D53/78 ,  B01D2251/106 ,  B01D2257/108 ,  B01D2257/302 ,  B01D2257/602

公开(公告)号：EP3147023A4

公开(公告)日：2017-10-25

申请号：EP15795643

申请日：2015-05-18

Applicant: CHIYODA CORP

Inventor： TAKEDA DAI ,  AWAI EIJI ,  MATSUMOTO JUN ,  UEMURA MASATAKA ,  MARUKAWA HIRONOBU

IPC: B01D53/64 ,  B01D53/78 ,  B01D53/96 ,  C01G13/00 ,  C02F1/62 ,  C02F1/76

CPC classification number: B01D53/64 ,  B01D53/78 ,  B01D53/96 ,  B01D2251/108 ,  B01D2251/30 ,  B01D2257/602 ,  C01G13/00 ,  F23J15/04 ,  F23J2215/60

Abstract: The invention provides a treatment process of a gas containing zero-valent mercury and a mercury separation system, by which the amount of an iodine compound used can be reduced when the zero-valent mercury is separated from the gas containing the zero-valent mercury by using the iodine compound. The treatment process of the gas containing the zero-valent mercury has a mercury oxidation step of oxidizing the zero-valent mercury contained in the gas containing the zero-valent mercury with a first liquid phase containing an alkali metal iodide to take the zero-valent mercury into the first liquid phase, thereby obtaining a second liquid phase containing a divalent mercury ion and an iodide ion; a mercury separation step of separating the divalent mercury ion as mercury sulfide by adjusting the pH of the second liquid phase obtained in the mercury oxidation step with a pH adjustor and adding an alkali metal sulfide; and a first circulation step of circulating a third liquid phase which is obtained by separating the mercury sulfide in the mercury separation step and contains an alkali metal ion and the iodide ion to use the third liquid phase as the first liquid phase in the mercury oxidation step.

公开(公告)号：EP2260940A4

公开(公告)日：2014-08-13

申请号：EP08765411

申请日：2008-06-04

Applicant: CHIYODA CORP

Inventor： KAWAMURA KAZUSHIGE ,  TAKEDA DAI ,  AWAI EIJI

IPC: B01J27/08 ,  B01D53/86 ,  B01J21/18 ,  B01J33/00 ,  B01J37/22

CPC classification number: B01D53/8609 ,  B01D2255/702 ,  B01D2257/302 ,  B01D2257/602 ,  B01J21/18 ,  B01J23/04 ,  B01J27/08 ,  B01J37/0201 ,  C01B17/78 ,  F23J2215/20 ,  F23J2215/60 ,  F23J2219/10 ,  F23J2219/30 ,  F23J2219/60

Abstract: A carbon-based catalyst for flue gas desulfurization is brought into contact with a flue gas containing at least SO 2 gas, oxygen and water vapor so that the SO 2 gas can react with the oxygen and the water vapor to form sulfuric acid which is to be recovered. On a surface of the carbon-based catalyst, iodine, bromine or a compound thereof is added, ion exchanged or supported and a water-repellent treatment is applied. The carbon-based catalyst can also be used as a mercury adsorbent for flue gas treatment for adsorbing and removing metallic mercury from a flue gas containing metallic mercury, SO 2 gas, oxygen and water vapor.