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1. (WO2018100277) PROCESS FOR PREPARING INDIGO CARMINE
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Pub. No.: WO/2018/100277 International Application No.: PCT/FR2017/053260
Publication Date: 07.06.2018 International Filing Date: 27.11.2017
IPC:
C09B 67/54 (2006.01) ,C09B 7/02 (2006.01) ,A61K 49/00 (2006.01) ,A23L 5/47 (2016.01)
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
B
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; MORDANTS; LAKES
67
Influencing the physical, e.g. the dyeing or printing, properties of dyestuffs without chemical reaction, e.g. by treating with solvents; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
54
Separation; Purification
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
B
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; MORDANTS; LAKES
7
Indigoid dyes
02
Bis-indole indigos
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
49
Preparations for testing in vivo
[IPC code unknown for A23L 5/47]
Applicants:
PROVEPHARM LIFE SOLUTIONS [FR/FR]; Les Baronnies 22 rue Marc Donadille 13013 Marseille, FR
Inventors:
SAYAH, Babak; FR
QUERU, Stéphane; FR
FERAUD, Michel; FR
Agent:
CORIZZI, Valérie; FR
Priority Data:
166178401.12.2016FR
Title (EN) PROCESS FOR PREPARING INDIGO CARMINE
(FR) PROCEDE DE PREPARATION DU CARMIN D'INDIGO
Abstract:
(EN) Process for preparing disodium 5,5'-indigosulfonate, the feedstock being indigo, this process comprising the following steps: i) the indigo is subjected to a sulfonation treatment resulting in a mixture that contains 5,5'-indigosulfonic acid, this process being characterized in that: ii) a reduction treatment is applied to the mixture obtained in step i), and optionally a purification step, so as to obtain a composition comprising leuco-5,5'-indigosulfonic acid, iii) the leuco-5,5'-indigosulfonic acid is isolated from the composition resulting from step ii), iv) the leuco-5,5'-indigosulfonic acid resulting from step iii) is oxidized to give disodium 5,5'-indigosulfonate.
(FR) Procédé de préparation de 5,5'-indigosulfonate de di-sodium, le produit de départ étant de l'indigo, ce procédé comprenant les étapes suivantes : i) l'indigo est soumis à un traitement de sulfonation conduisant à un mélange qui contient de l'acide 5,5'-indigosulfonique, ce procédé étant caractérisé en ce que : ii) on applique un traitement de réduction au mélange obtenu à l'étape i), et éventuellement une étape de purification, de façon à obtenir une composition comprenant de l'acide leuco-5,5'-indigosulfonique, iii) l'acide leuco-5,5'-indigosulfonique est isolé de la composition issue de l'étape ii), iv) l'acide leuco-5,5'-indigosulfonique issu de l'étape iii) est oxydé en 5,5'- indigosulfonate de di-sodium.
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)