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1. (WO2019063295) MULTISTEP PROCESS FOR THE PREPARATION OF DIISOCYANATES
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Pub. No.: WO/2019/063295 International Application No.: PCT/EP2018/074636
Publication Date: 04.04.2019 International Filing Date: 12.09.2018
IPC:
C07C 263/04 (2006.01) ,C07C 265/14 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
263
Preparation of derivatives of isocyanic acid
04
from or via carbamates or carbamoyl halides
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
265
Derivatives of isocyanic acid
14
containing at least two isocyanate groups bound to the same carbon skeleton
Applicants:
COVESTRO DEUTSCHLAND AG [DE/DE]; Kaiser-Wilhelm-Allee 60 51373 Leverkusen, DE
Inventors:
MERKEL, Michael; DE
Agent:
DAVEPON, Björn; DE
Priority Data:
17193251.026.09.2017EP
Title (EN) MULTISTEP PROCESS FOR THE PREPARATION OF DIISOCYANATES
(FR) PROCÉDÉ MULTI-ÉTAPES POUR LA PRÉPARATION DE DIISOCYANATES
Abstract:
(EN) The present invention relates to a process for the preparation of organic diisocyanates by cleaving the corresponding diurethanes into the diisocyanate and a hydroxy compound and separating the diisocyanate from the hydroxy compound by distillation wherein the diisocyanate is obtained as the distillate.
(FR) La présente invention concerne un procédé de préparation de diisocyanates organiques par clivage des diuréthanes correspondants dans le diisocyanate et un composé hydroxy, ainsi que la séparation du diisocyanate du composé hydroxy par distillation, le diisocyanate étant obtenu en tant que distillat.
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: English (EN)
Filing Language: English (EN)