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.

公开(公告)号：EP2559667A4

公开(公告)日：2013-11-20

申请号：EP11759612

申请日：2011-03-25

Applicant: CHIYODA CORP

Inventor： KAWAMURA KAZUSHIGE ,  OGI SATOSHI ,  SHINOHARA MASAYO

IPC: B01D61/02 ,  C02F1/20 ,  C02F1/44 ,  C02F1/52 ,  C02F1/58 ,  C02F1/66 ,  C02F1/70 ,  C02F1/72 ,  C02F3/12 ,  C02F3/28 ,  C02F3/30 ,  C02F9/00 ,  C02F101/10 ,  C02F101/14 ,  C02F101/16 ,  C02F101/18 ,  C02F101/30 ,  C02F103/18

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D2311/04 ,  B01D2311/103 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2626 ,  B01D2311/2634 ,  B01D2311/2642 ,  B01D2311/2665 ,  B01D2311/2688 ,  B01D2315/06 ,  C02F1/20 ,  C02F1/5236 ,  C02F1/66 ,  C02F1/72 ,  C02F3/12 ,  C02F3/28 ,  C02F3/30 ,  C02F2001/5218 ,  C02F2101/101 ,  C02F2101/106 ,  C02F2101/14 ,  C02F2101/16 ,  C02F2101/18 ,  C02F2101/30 ,  C02F2103/18 ,  Y02W10/15 ,  B01D2311/2661

Abstract: Disclosed herein are a treatment method and a treatment system which are capable of inexpensively, efficiently, and safely treating wastewater discharged from a gasification plant in large amounts and containing two or more persistent substances. The method for treating wastewater discharged by wet-cleaning of gas obtained by partial oxidation of fossil fuel includes: a free cyanide removal step 2 in which free cyanides contained in the wastewater are removed by acidifying and aerating the wastewater; a biological treatment step 3 in which the wastewater that has been treated in the free cyanide removal step 2 is biologically treated; and a decomposition treatment step 4 in which COD components contained in the wastewater that has been treated in the biological treatment step 3 are decomposed. The decomposition treatment step 4 is preferably performed by an advanced oxidation treatment means, and may include the step of crystallizing calcium sulfate by adding a calcium-based alkaline agent to the wastewater.

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