EP 1109774 A1 20010627 - METHOD FOR PRODUCING ACROLEIN AND/OR ACRYLIC ACID FROM PROPANE
Title (en)
METHOD FOR PRODUCING ACROLEIN AND/OR ACRYLIC ACID FROM PROPANE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ACROLEIN UND/ODER ACRYLSÄURE AUS PROPAN
Title (fr)
PROCEDE DE PRODUCTION D'ACROLEINE ET/OU D'ACIDE ACRYLIQUE A PARTIR DE PROPANE
Publication
Application
Priority
- DE 19837517 A 19980819
- EP 9905793 W 19990810
Abstract (en)
[origin: DE19837517A1] In the production of acrolein and/or acrylic acid from propane, the oxygen required in reaction zone 1 (catalytic dehydrogenation to propene) is supplied as nitrogen-containing modified air containing less N2 and more O2 than normal air and some of the N2 in the off-gas from further zones (propene oxidation) is removed before recycling to zone 1. A process for the production of acrolein (AC) and/or acrylic acid (AA) from propane, involving (a) partial oxydehydrogenation to propene with molecular oxygen in a first reaction zone (1) using homogeneous and/or heterogeneous catalysts, (b) further catalytic gas-phase oxidation of the unseparated product gas mixture in further reaction zone(s) (2) to give AC and/or AA, (c) separation of AC and/or AA and water from the product mixture and (d) recycling unreacted propane to zone 1. In this process, the molecular oxygen required in zone 1 (other than circulating oxygen) is added to the starting gas mixture in the form of nitrogen-containing modified air with a lower N2 content and a higher O2 content than normal air, and at least some of the molecular N2 in the residual gas stream is removed before this stream is recycled to zone 1.
IPC 1-7
IPC 8 full level
C07B 61/00 (2006.01); C07C 5/48 (2006.01); C07C 11/06 (2006.01); C07C 27/12 (2006.01); C07C 45/28 (2006.01); C07C 45/33 (2006.01); C07C 45/35 (2006.01); C07C 47/22 (2006.01); C07C 51/215 (2006.01); C07C 51/25 (2006.01); C07C 57/05 (2006.01); C07C 57/055 (2006.01)
CPC (source: EP US)
C07C 45/33 (2013.01 - EP US); C07C 45/35 (2013.01 - EP US); C07C 51/215 (2013.01 - EP US); C07C 51/252 (2013.01 - EP US)
Citation (search report)
See references of WO 0010961A1
Designated contracting state (EPC)
BE DE FR NL
DOCDB simple family (publication)
DE 19837517 A1 20000224; AU 5512699 A 20000314; BR 9914612 A 20010807; CN 1312788 A 20010912; EP 1109774 A1 20010627; JP 2002523390 A 20020730; MY 133225 A 20071031; US 6426433 B1 20020730; WO 0010961 A1 20000302
DOCDB simple family (application)
DE 19837517 A 19980819; AU 5512699 A 19990810; BR 9914612 A 19990810; CN 99809667 A 19990810; EP 9905793 W 19990810; EP 99941557 A 19990810; JP 2000566235 A 19990810; MY PI9903529 A 19990817; US 76322501 A 20010220