WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2005102992) PROCESS FOR THE PREPARATION OF UREA FROM CARBON DIOXIDE AND AMMONIA IN A UREA PLANT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/102992    International Application No.:    PCT/NL2005/000248
Publication Date: 03.11.2005 International Filing Date: 04.04.2005
IPC:
C07C 273/04 (2006.01)
Applicants: DSM IP ASSETS B.V. [NL/NL]; Het Overloon 1, NL-2611 TE Heerlen (NL) (For All Designated States Except US).
HEIJNEN, Leonardus, Henricus, Gertrudis, Maria [NL/NL]; (NL) (For US Only).
DIELTJENS, Luc, Louis, Maria [BE/NL]; (NL) (For US Only)
Inventors: HEIJNEN, Leonardus, Henricus, Gertrudis, Maria; (NL).
DIELTJENS, Luc, Louis, Maria; (NL)
Agent: SCHELTUS, Irma; DSM Intellectual Property, P.O. Box 9, NL-6160 MA Geleen (NL)
Priority Data:
1026003 22.04.2004 NL
Title (EN) PROCESS FOR THE PREPARATION OF UREA FROM CARBON DIOXIDE AND AMMONIA IN A UREA PLANT
(FR) PROCESSUS DE PREPARATION D'UREE A PARTIR DE DIOXYDE DE CARBONE ET D'AMMONIAC DANS UNE USINE D'UREE
Abstract: front page image
(EN)The invention relates to a process for the preparation of urea from carbon dioxide and ammonia in a urea plant comprising a high-pressure section and at least one recovery section at a lower pressure, an aqueous ammonium carbamate solution being formed in the recovery section(s) at a lower pressure, which solution is returned to the section having a higher pressure, wherein the crystallization point of the ammonium carbamate solution is determined in the recovery section(s) of the urea plant.
(FR)L'invention concerne un processus de préparation d'urée à partir de dioxyde de carbone et d'ammoniac dans une usine d'urée pourvue d'une section à haute pression et d'au moins une section de récupération à basse pression, une solution de carbamate d'ammonium aqueuse étant formée dans la section de récupération à basse pression. Ladite solution retourne à la section possédant une pression plus élevée, le point de cristallisation de la solution de carbamate d'ammonium étant déterminé dans la section de récupération de l'usine d'urée.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, 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)