公开(公告)号：MY169810A

公开(公告)日：2019-05-16

申请号：MYPI2014702401

申请日：2013-02-18

Applicant: CHIYODA CORP ,  CHIYODA CORP

Inventor： KAWAMURA KAZUSHIGE ,  AWAI EIJI ,  TAKEDA DAI

Abstract: Disclosed herein is a method for simply treating produced water extracted in large quantity while suppressing an increase in cost due to the use of a chemical agent and the associated generation of waste. The method is a method for treating produced water extracted in association with crude oil production or natural gas production and containing at least oil as a substance to be treated including: an oil separating step 1 optionally performed to remove free oil or the like from the produced water; a flocculation step 2 in which emulsified oil is flocculated by introducing micronanobubbles composed of an ozone-containing gas into the produced water so that a gas-liquid contact time of 2 to 60 minutes is preferably achieved; and a flotation step 3 in which the flocculated emulsified oil is separated as scum by flotation to obtain clarified water.

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.

公开(公告)号：CA2949453A1

公开(公告)日：2015-11-26

申请号：CA2949453

申请日：2015-05-18

Applicant: CHIYODA CORP

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

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

Abstract: Provided are a method for treating gas that contains zero-valent mercury and a mercury separation system, with which the use of an iodine compound can be reduced when a zero-valent mercury is separated from gas that contains the zero-valent mercury. The method for treating gas that contains zero-valent mercury comprises: a mercury oxidation step for using a first liquid phase containing an alkali metal iodide to oxidize a zero-valent mercury contained in gas containing the zero-valent mercury, incorporating the oxidized mercury into the first liquid phase, thereby obtaining a second liquid phase comprising divalent mercury ions and iodide ions; a mercury separation step for using a pH adjuster to adjust the pH of the second liquid phase obtained in the mercury oxidation step, and adding an alkali metal sulfide, thereby separating the divalent mercury ions as mercury sulfide; and a first circulating step for circulating a third liquid phase containing the alkali metal ions and iodide ions obtained when the mercury sulfide was separated in the mercury separation step, the circulated third liquid phase being used as the first liquid phase of the mercury oxidation step.

公开(公告)号：PE15542015A1

公开(公告)日：2015-11-20

申请号：PE0007052015

申请日：2013-10-25

Applicant: CHIYODA CORP

Inventor： KAWAMURA KAZUSHIGE ,  TAKEDA DAI ,  AWAI EIJI ,  TAKEI NOBORU ,  UEMURA MASATAKA

IPC: B01D53/86 ,  C01B17/74 ,  C02F1/72 ,  C02F1/78

CPC classification number: B01D53/8609 ,  B01D53/1481 ,  B01D53/507 ,  B01D53/75 ,  B01D2252/2056 ,  B01D2255/702 ,  C01B17/74 ,  C02F1/283 ,  C02F1/72 ,  C02F1/78 ,  C02F2101/101 ,  C02F2103/18 ,  Y02A50/2348

Abstract: Se proporciona un metodo y un dispositivo que son para su uso en la desulfuracion de un gas descargado desde un dispositivo para la produccion de acido sulfurico de proceso de contacto y por el cual no solo la desulfuracion se puede realizar economicamente sin la necesidad de grandes gastos para la compra de productos quimicos o para la eliminacion de sales de acido sulfurico, sino tambien el acido sulfurico diluido resultante de la desulfuracion se puede utilizar efectivamente para aumentar el rendimiento de acido sulfurico concentrado. Este dispositivo es para desulfuracion de un gas de descarga que contiene oxidos de azufre y que fue descargado de un dispositivo para la produccion de acido sulfurico, que incluye una etapa de produccion de acido sulfurico concentrado en la que gas trioxido de azufre obtenido mediante la oxidacion de gas dioxido de azufre se absorbe en una solucion acuosa de acido sulfurico, mientras se le suministra agua a la misma para de ese modo producir acido sulfurico que tiene una concentracion entre 90% y 99% en peso. El dispositivo de desulfuracion comprende: una torre de desulfuracion en la que los oxidos de azufre se eliminan del gas de descarga y, simultaneamente con ello, acido sulfurico diluido se forma a partir de los oxidos de azufre; y un mezclador de acido sulfurico diluido que, en la etapa de produccion de acido sulfurico concentrado, mezcla el acido sulfurico diluido con la solucion de acido sulfurico acuoso

公开(公告)号：PL2452740T3

公开(公告)日：2014-02-28

申请号：PL12153676

申请日：2008-03-05

Applicant: CHIYODA CORP

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

IPC: B01D53/50 ,  B01D53/14 ,  B01D53/34 ,  B01D53/64 ,  B01D53/78

公开(公告)号：ES2458625T3

公开(公告)日：2014-05-06

申请号：ES08721846

申请日：2008-03-05

Applicant: CHIYODA CORP

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

IPC: B01D53/14 ,  B01D53/34 ,  B01D53/50 ,  B01D53/64 ,  B01D53/77 ,  B01D53/78

Abstract: Un método de tratamiento de gases de escape, de eliminación de dióxido de azufre procedente de los gases de escape que contienen al menos dióxido de azufre y mercurio mediante la puesta en contacto de los gases de escape con líquido de absorción, en el que se añade peroxodisulfato al líquido de absorción para eliminar el mercurio de los gases de escape; caracterizado por que además se añade yodo, bromo o un compuesto de cualquiera de ellos al líquido de absorción.

公开(公告)号：AU2008221843B2

公开(公告)日：2012-07-12

申请号：AU2008221843

申请日：2008-03-05

Applicant: CHIYODA CORP

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

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

Abstract: A method of treating an emission gas, comprising bringing an emission gas containing at least sulfur dioxide and mercury into contact with an absorbent liquid to thereby remove the sulfur dioxide from the emission gas, wherein persulfuric acid is added to the absorbent liquid. Alternatively, an iodine gas is added to the emission gas, and the resultant gas is brought into contact with an absorbent liquid of wet flue gas desulfurization equipment. Accordingly, there can be provided a method of treating an emission gas in which even when fluctuations occur in power generation load and emission gas composition, a high rate of removal of sulfur dioxide and mercury can be stably maintained over a prolonged period of time.

公开(公告)号：CA2680175A1

公开(公告)日：2008-09-12

申请号：CA2680175

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

Abstract: A method of treating an emission gas, comprising bringing an emission gas containing at least sulfur dioxide and mercury into contact with an absorbe nt liquid to thereby remove the sulfur dioxide from the emission gas, wherei n persulfuric acid is added to the absorbent liquid. Alternatively, an iodin e gas is added to the emission gas, and the resultant gas is brought into co ntact with an absorbent liquid of wet flue gas desulfurization equipment. Ac cordingly, there can be provided a method of treating an emission gas in whi ch even when fluctuations occur in power generation load and emission gas co mposition, a high rate of removal of sulfur dioxide and mercury can be stabl y maintained over a prolonged period of time.