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1. (WO1997016376) METHOD FOR PROCESSING FLUE GASES CONTAINING SULPHUR OXIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016376 International Application No.: PCT/FR1996/001719
Publication Date: 09.05.1997 International Filing Date: 31.10.1996
Chapter 2 Demand Filed: 26.05.1997
IPC:
B01D 53/50 (2006.01) ,B01D 53/68 (2006.01) ,C01D 5/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation 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
34
Chemical or biological purification of waste gases
46
Removing components of defined structure
48
Sulfur compounds
50
Sulfur oxides
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation 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
34
Chemical or biological purification of waste gases
46
Removing components of defined structure
68
Halogens or halogen compounds
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
D
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
5
Sulfates or sulfites of sodium, potassium, or alkali metals in general
Applicants:
NOVACARB [FR/FR]; 25, quai Paul-Doumer F-92408 Courbevoie Cédex, FR (AllExceptUS)
FOURCOT, Fabrice [FR/FR]; FR (UsOnly)
POUXVIEL, Jean-Claude [FR/FR]; FR (UsOnly)
Inventors:
FOURCOT, Fabrice; FR
POUXVIEL, Jean-Claude; FR
Agent:
DUTRUC-ROSSET, Marie-Claude; Rhône-Poulenc Chimie 25, quai Paul-Doumer F-92408 Courbevoie, FR
Priority Data:
95/1297531.10.1995FR
Title (EN) METHOD FOR PROCESSING FLUE GASES CONTAINING SULPHUR OXIDES
(FR) PROCEDE DE TRAITEMENT DE FUMEES A BASE D'OXYDES DE SOUFRE
Abstract:
(EN) A method for dry or wet-dry processing flue gases containing compounds such as sulphur oxides, wherein the flue gases are treated with a reagent selected from sodium carbonate, sodium bicarbonate and mixtures thereof, the resulting sodium sulphates are selectively dissolved in water, the solids still in suspension in the solution are separated, and the purified sodium sulphate contained in said solution is crystallised. The method enables reusable sodium sulphate to be produced.
(FR) La présente invention a pour objet un procédé de traitement de fumées comprenant des composés du type des SOx, par voie sèche ou semi-humide, consistant à effectuer les étapes suivantes: on traite lesdites fumées avec un réactif choisi parmi le carbonate de sodium, bicarbonate de sodium et leurs mélanges, on dissout sélectivement les sulfates de sodium produits, dans l'eau, on sépare les solides restants en suspension dans la solution, on cristallise le sulfate de sodium purifié présent dans la solution précitée. Le procédé selon l'invention permet d'obtenir du sulfate de sodium revalorisable.
Designated States: AL, AM, AU, AZ, BA, BB, BG, BR, BY, CA, CN, CU, CZ, EE, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, RO, RU, SD, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
ES2153990EP0858428US6180074JPH11514567 CA2233246DE000069611689
PT858428AU1996074995FR2740354DK0858428BG62608