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Machine translation
1. (WO2012091845) METHOD FOR REDUCING EQUIPMENT FOULING IN (METH)ACRYLIC ACID PRODUCTION PROCESS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/091845    International Application No.:    PCT/US2011/062605
Publication Date: 05.07.2012 International Filing Date: 30.11.2011
IPC:
C07C 51/50 (2006.01), C07C 57/04 (2006.01)
Applicants: ROHM AND HAAS COMPANY [US/US]; 100 Independence Mall West Philadelphia, PA 19106 (US) (For All Designated States Except US).
CHARENDOFF, Marc [US/US]; (US) (For US Only).
JULIETTE, Jamie, Jerrick [US/US]; (US) (For US Only).
MENDOZA, Joy [US/US]; (US) (For US Only).
SHAH, Rajesh [IN/US]; (US) (For US Only)
Inventors: CHARENDOFF, Marc; (US).
JULIETTE, Jamie, Jerrick; (US).
MENDOZA, Joy; (US).
SHAH, Rajesh; (US)
Agent: HAYHURST, Paul, D.; The Dow Chemical Company P.O. Box 1967 Intellectual Property Midland, MI 48641-1967 (US)
Priority Data:
61/460,245 29.12.2010 US
Title (EN) METHOD FOR REDUCING EQUIPMENT FOULING IN (METH)ACRYLIC ACID PRODUCTION PROCESS
(FR) PROCÉDÉ PERMETTANT DE RÉDUIRE L'ENCRASSEMENT DE L'ÉQUIPEMENT DANS UN PROCÉDÉ DE PRODUCTION D'ACIDE (MÉTH)ACRYLIQUE
Abstract: front page image
(EN)The present invention provides a method for reducing fouling of equipment during separation and purification steps of (meth)acrylic acid production by early removal of aldehyde impurities by adding a hydrazide compound well upstream of the separation and purification steps. In particular, carbodhydrazide may be added as an aldehyde scavenging agent to aqueous (meth)acrylic acid prior to dehydration and purification steps.
(FR)Cette invention concerne un procédé permettant de réduire l'encrassement de l'équipement pendant les étapes de séparation et de purification d'un procédé de production d'acide (méth)acrylique par élimination précoce des impuretés de type aldéhyde par ajout d'un composé d'hydrazide bien en amont desdites étapes de séparation et de purification. En particulier, un carbodhydrazide peut être ajouté à titre d'agent de captage d'aldéhyde à l'acide (méth)acrylique aqueux avant les étapes de déshydratation et de purification.
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: English (EN)
Filing Language: English (EN)