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1. (WO1999008985) PURIFICATION OF A METHANOL STREAM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1999/008985    International Application No.:    PCT/EP1998/004695
Publication Date: 25.02.1999 International Filing Date: 27.07.1998
Chapter 2 Demand Filed:    01.03.1999    
IPC:
C07C 29/80 (2006.01), C07C 29/84 (2006.01), C07C 45/83 (2006.01)
Applicants: ARCO CHEMICAL TECHNOLOGY, L.P. [US/US]; Two Greenville Crossing, Suite 238, 4001 Kennett Pike, Greenville, DE 19807 (US) (AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, CA, CF, CG, CH, CI, CM, CN, CU, CY, CZ, DE, DK, EE, ES, FI, FR, GA, GB, GE, GH, GM, GN, GR, GW, HR, HU, ID, IE, IL, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MC, MD, MG, MK, ML, MR, MW, MX, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW only).
ARCO CHEMIE TECHNOLOGIE NEDERLAND B.V. [NL/NL]; Theemsweg 14, P.O. Box 7195, NL-3000 HD Rotterdam (NL) (MN only)
Inventors: RUETER, Michael, A.; (US).
JUBIN, John, C., Jr.; (US)
Agent: SMAGGASGALE, Gillian, Helen; Mathys & Squire, 100 Gray's Inn Road, London WC1X 8AL (GB)
Priority Data:
08/911,972 15.08.1997 US
Title (EN) PURIFICATION OF A METHANOL STREAM
(FR) PURIFICATION D'UN FLUX DE METHANOL
Abstract: front page image
(EN)Acetaldehyde may be effectively removed from a contaminated methanol stream using a distillation method wherein a solvent stream comprised of a relatively heavy polar compound such as water or propylene glycol is utilized as an extractive distillation solvent. Following the separation of the polar compound from the bottoms stream obtained by extractive distillation, the purified methanol may be recycled for use as a reaction solvent in an olefin epoxidation process.
(FR)La présente invention concerne un procédé de distillation permettant d'éliminer efficacement l'acétaldéhyde d'un flux de méthanol contaminé. Un flux de solvant comprend un composé polaire relativement lourd tel que de l'eau ou du propylèneglycol utilisé comme solvant de distillation extractive. Après la séparation du composé polaire du flux de résidus obtenu par distillation extractive, le méthanol purifié peut être recyclé pour être utilisé comme solvant de réaction dans un processus d'époxydation d'une oléfine.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, HR, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)