US 7,321,068 B2
Method for producing tricyclodecandialdehyde
Rainer Papp, Speyer (Germany); Rocco Paciello, Bad Dürkheim (Germany); and Christoph Benisch, Mannheim (Germany)
Assigned to BASF Aktiengesellschaft, Ludwigshafen (Germany)
Appl. No. 10/581,802
PCT Filed Dec. 14, 2004, PCT No. PCT/EP2004/013814
§ 371(c)(1), (2), (4) Date Jun. 05, 2006,
PCT Pub. No. WO2005/058786, PCT Pub. Date Jun. 30, 2005.
Claims priority of application No. 103 57 718 (DE), filed on Dec. 09, 2003.
Prior Publication US 2007/0100168 A1, May 03, 2007
Int. Cl. C07C 45/50 (2006.01); C07C 35/21 (2006.01); C07C 209/00 (2006.01)
U.S. Cl. 568—444  [568/816; 564/446] 19 Claims
 
1. A process for preparing tricyclodecanedialdehyde comprising hydroformylation of dicyclopentadiene with a CO/H2 mixture at elevated temperature and under superatmospheric pressure in the presence of a rhodium catalyst, which has not been modified by means of a ligand and is homogeneously dissolved in the hydroformylation medium, wherein the hydroformylation is carried out at a pressure of from 200 to 350 bar in at least two reaction zones, with a reaction temperature of from 80 to 120° C. in a first reaction zone and a reaction temperature of from 120 to 150° C. in a subsequent reaction zone, with the proviso that the reaction temperature in the subsequent reaction zone is at least 5° C. higher than in the first reaction zone.