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1. WO2018104257 - REMOVAL OF ARSENIC FROM FLUE-GAS

Publication Number WO/2018/104257
Publication Date 14.06.2018
International Application No. PCT/EP2017/081435
International Filing Date 05.12.2017
IPC
B01D 53/64 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
34Chemical or biological purification of waste gases
46Removing components of defined structure
64Heavy metals or compounds thereof, e.g. mercury
CPC
B01D 2252/30
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2252Absorbents, i.e. solvents and liquid materials for gas absorption
30Ionic liquids and zwitter-ions
B01D 2253/102
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2253Adsorbents used in seperation treatment of gases and vapours
10Inorganic adsorbents
102Carbon
B01D 2253/25
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2253Adsorbents used in seperation treatment of gases and vapours
25Coated, impregnated or composite adsorbents
B01D 2253/306
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2253Adsorbents used in seperation treatment of gases and vapours
30Physical properties of adsorbents
302Dimensions
306Surface area, e.g. BET-specific surface
B01D 2258/025
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2258Sources of waste gases
02Other waste gases
025from metallurgy plants
B01D 2258/0283
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2258Sources of waste gases
02Other waste gases
0283Flue gases
Applicants
  • UMICORE [BE]/[BE]
Inventors
  • SCHMIDT, Anne
  • VERMEULEN, Isabel
  • NOCKEMANN, Peter
Agents
  • PILATE, André
Priority Data
16202195.005.12.2016EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) REMOVAL OF ARSENIC FROM FLUE-GAS
(FR) ÉLIMINATION DE L'ARSENIC DES GAZ DE COMBUSTION
Abstract
(EN)
The divulged invention concerns a process for the removal of arsenic oxides inprocessexhaust gases, comprising the step of passing the exhaust gases through a supported ionic liquid phase bed,characterized in that the ionic liquid comprises one or more cations from the list consisting of substituted phosphonium, ammonium, imidazolium, pyrrolidinium, and pyridinium, and one or more anions from the list consisting of chloride, bromide, and carboxylate. Compared toa bed of active carbon, theionic liquid soaked active carbon bed according to the invention allows for an estimated doubling of thearsenic adsorptioncapacity of the bed, while also considerably enhancingthe kineticsofadsorption.
(FR)
La présente invention concerne un procédé d'élimination d'oxydes d'arsenic des gaz d'échappement de procédé, comprenant l'étape consistant à faire passer les gaz d'échappement à travers un lit de phase liquide ionique supporté, caractérisé en ce que le liquide ionique comprend un ou plusieurs cations de la liste constituée par le phosphonium substitué, l'ammonium, l'imidazolium, le pyrrolidinium et le pyridinium, et un ou plusieurs anions de la liste consistant en chlorure, bromure et carboxylate. Par rapport à un lit de charbon actif, le lit de charbon actif imbibé de liquide ionique selon l'invention permet un doublement estimé de la capacité d'adsorption d'arsenic du lit, tout en améliorant considérablement la cinétique d'adsorption.
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