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1. WO1999007690 - PROPYLENE OXIDE PURIFICATION

Publication Number WO/1999/007690
Publication Date 18.02.1999
International Application No. PCT/EP1998/004693
International Filing Date 27.07.1998
Chapter 2 Demand Filed 12.02.1999
IPC
C07D 301/32 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
301Preparation of oxiranes
32Separation; Purification
CPC
B01D 3/40
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
3Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
34with one or more auxiliary substances
40Extractive distillation
B01J 29/89
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
29Catalysts comprising molecular sieves
89Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
C07D 301/32
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
301Preparation of oxiranes
32Separation; Purification
C07D 303/04
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
303Compounds containing three-membered rings having one oxygen atom as the only ring heteroatom
02Compounds containing oxirane rings
04containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
Applicants
  • ARCO CHEMICAL TECHNOLOGY, L.P. [US]/[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)
  • ARCO CHEMIE TECHNOLOGIE NEDERLAND B.V. [NL]/[NL] (MN)
Inventors
  • RUETER, Michael, A.
Agents
  • SMAGGASGALE, Gillian, Helen
  • CROPP, John, Anthony, David
Priority Data
08/908,60408.08.1997US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROPYLENE OXIDE PURIFICATION
(FR) PURIFICATION D'OXYDE DE PROPYLENE
Abstract
(EN) Propylene oxide obtained by an epoxidation process which uses methanol as a solvent may be effectively treated to remove acetaldehyde by subjecting the crude epoxidation reaction product to fractional distillation. The methanol solvent is utilized during such distillation to lower the relative volatility of the acetaldehyde impurity, thereby making it possible to obtain a bottoms fraction containing substantially all the acetaldehyde. Purified propylene oxide having a reduced acetaldehyde concentration is removed as an overhead stream. Water may also be effectively separated from the propylene oxide using this procedure.
(FR) L'invention concerne un traitement efficace de l'oxyde de propylène résultant d'un processus d'époxydation utilisant du méthanol en guise de solvant. Ce traitement permet d'éliminer l'acétaldéhyde par distillation fractionnée du produit réactionnel brut d'époxidation. Dans ce type de distillation on utilise le solvant méthanol pour abaisser la volatilité relative des impuretés acétaldéhyde, ce qui permet d'obtenir une fraction résidu contenant sensiblement tout l'acétaldéhyde. On retire l'oxyde de propylène purifié présentant une concentration réduite d'acétaldéhyde sous forme d'un flux de tête. Cette procédure permet également de séparer efficacement l'eau de l'oxyde de propylène.
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