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1. (WO2012042184) PROCESS FOR PREPARING DIALKYL DISULPHIDES
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/042184    International Application No.:    PCT/FR2011/052285
Publication Date: 05.04.2012 International Filing Date: 30.09.2011
IPC:
C07C 319/28 (2006.01), C07C 321/14 (2006.01)
Applicants: ARKEMA FRANCE [FR/FR]; 420, Rue d'Estienne d'Orves F-92700 Colombes (FR) (For All Designated States Except US).
FREMY, Georges [FR/FR]; (FR) (For US Only).
RAYMOND, Jean-Michel [FR/FR]; (FR) (For US Only)
Inventors: FREMY, Georges; (FR).
RAYMOND, Jean-Michel; (FR)
Agent: PRAS, Jean-Louis; (DRD-DPI) 420 Rue d'Estienne d'Orves F-92705 COLOMBES cedex (FR)
Priority Data:
1057904 30.09.2010 FR
Title (EN) PROCESS FOR PREPARING DIALKYL DISULPHIDES
(FR) PROCÉDÉ DE PRÉPARATION DE DISULFURES DE DIALKYLE
Abstract: front page image
(EN)The present invention relates to a process for obtaining dialkyl disulphides from an alkyl mercaptan and a sulphur, in which a reaction intermediate present in the final disulphide is decomposed at the end of synthesis. This operation makes it possible to avoid the degradation over time of said reaction intermediate which is responsible for the decrease in purity of the dialkyl disulphide.
(FR)La présente invention concerne un procédé d'obtention de disulfures de dialkyle à partir d'alkylmercaptan et de soufre, dans lequel un intermédiaire réactionnel présent dans le disulfure final est décomposé en fin de synthèse. Cette opération permet d'éviter la dégradation dans le temps dudit intermédiaire réactionnel qui responsable de la diminution de pureté du disulfure de dialkyle.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 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 (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, 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, ML, MR, NE, SN, TD, TG).
Publication Language: French (FR)
Filing Language: French (FR)