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1. (WO2018178553) METHOD FOR RECOVERING HYDROFLUORIC ACID
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Pub. No.: WO/2018/178553 International Application No.: PCT/FR2018/050733
Publication Date: 04.10.2018 International Filing Date: 27.03.2018
IPC:
C01B 7/19 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
7
Halogens; Halogen acids
19
Fluorine; Hydrogen fluoride
Applicants: ARKEMA FRANCE[FR/FR]; 420 rue d'Estienne d'Orves 92700 COLOMBES, FR
Inventors: DEUR-BERT, Dominique; FR
WENDLINGER, Laurent; FR
Agent: LECA, François; FR
Priority Data:
175258028.03.2017FR
Title (EN) METHOD FOR RECOVERING HYDROFLUORIC ACID
(FR) PROCÉDÉ DE RÉCUPÉRATION D'ACIDE FLUORHYDRIQUE
Abstract:
(EN) The present invention concerns a method for recovering hydrofluoric acid comprising the steps of i) bringing a first flow, comprising a hydrocarbon compound A having at least one fluorine atom and hydrofluoric acid, preferably in gas form, into contact with an aqueous solution of hydrofluoric acid with a concentration greater than 40% by weight in order to form a second two-phase flow comprising the compound A and hydrofluoric acid, ii) storing said second two-phase flow in a buffer tank, said second two-phase flow consisting of a liquid phase and a gas phase, iii) passing said gas phase G1 of said second two-phase flow into an absorption column fed in countercurrent with an aqueous stream in order to form a third flow comprising the compound A and a fourth flow comprising hydrofluoric acid.
(FR) La présente invention concerne un procédé de récupération d'acide fluorhydrique comprenant les étapes de i) mise en contact d'un premier courant comprenant un composé hydrocarbure A ayant au moins un atome de fluor et de l'acide fluorhydrique, de préférence sous forme gazeuse, avec une solution aqueuse d'acide fluorhydrique de concentration supérieure à 40 %en poids pour former un second courant diphasique comprenant le composé A et l'acide fluorhydrique, ii) stockage dudit second courant diphasique dans un réservoir tampon, ledit second courant diphasique étant constitué d'une phase liquide et d'une phase gazeuse, iii) passage de ladite phase gazeuse G1dudit second courant diphasique dans une colonne d'absorption alimenté à contre-courant par un flux aqueux pour former un troisième courant comprenant le composé A et un quatrième courant comprenant l'acide fluorhydrique.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)