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1. (WO2019030403) METHOD FOR ETCHING A PHOSPHATE SOURCE USING ACID
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/030403 International Application No.: PCT/EP2018/071818
Publication Date: 14.02.2019 International Filing Date: 10.08.2018
IPC:
C01B 25/01 (2006.01) ,C01B 25/22 (2006.01) ,C01B 25/225 (2006.01) ,C01B 25/226 (2006.01) ,C01B 25/32 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
25
Phosphorus; Compounds thereof
01
Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
25
Phosphorus; Compounds thereof
16
Oxyacids of phosphorus; Salts thereof
18
Phosphoric acid
22
Preparation by reacting phosphate containing material with an acid, e.g. wet process
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
25
Phosphorus; Compounds thereof
16
Oxyacids of phosphorus; Salts thereof
18
Phosphoric acid
22
Preparation by reacting phosphate containing material with an acid, e.g. wet process
222
with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
223
only one form of calcium sulfate being formed
225
Dihydrate process
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
25
Phosphorus; Compounds thereof
16
Oxyacids of phosphorus; Salts thereof
18
Phosphoric acid
22
Preparation by reacting phosphate containing material with an acid, e.g. wet process
222
with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
223
only one form of calcium sulfate being formed
226
Hemihydrate process
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
25
Phosphorus; Compounds thereof
16
Oxyacids of phosphorus; Salts thereof
26
Phosphates
32
Phosphates of magnesium, calcium, strontium, or barium
Applicants:
PRAYON TECHNOLOGIES [BE/BE]; rue Joseph Wauters, 144 4480 Engis, BE
Inventors:
WAVREILLE, Alexandre; BE
LEDERER, Livio; null
NINANE, Léon; FR
Agent:
GEVERS; Holidaystraat 5 1831 Diegem, BE
Priority Data:
BE2017/555411.08.2017BE
Title (EN) METHOD FOR ETCHING A PHOSPHATE SOURCE USING ACID
(FR) PROCEDE D'ATTAQUE ACIDE D'UNE SOURCE PHOSPHATEE
Abstract:
(EN) A method for etching a phosphate source with or without calcium using sulphuric acid for a predetermined period of time of between 20 and 180 minutes under conditions whereby the sulphate molar ratio from the sulphuric acid as well as optionally the phosphate source with calcium present in the phosphate source is between 0.6 and 0.8, and the content of P2O5 in the etching tank is less than 6%.
(FR) Procédé d'attaque à l'acide sulfurique d'une source de phosphate comprenant du calcium ou pas calcium pendant une période de temps prédéterminée comprise entre 20 et 180 minutes dans des conditions selon lesquelles le ratio molaire sulfate provenant de l'acide sulfurique ainsi qu'éventuellement de la source de phosphate au calcium présent dans la source de phosphate est compris entre 0,6 et 0,8, et la teneur en P2O5 dans la cuve d'attaque est inférieure à 6%.
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 Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)