C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
252/1, 53/168, 7
C22C 1/04 (2006.01) B01J 31/40 (2006.01) B22F 9/30 (2006.01) C01G 55/00 (2006.01) C07C 45/50 (2006.01) C07C 45/59 (2006.01) C07C 45/60 (2006.01) C07D 319/06 (2006.01) C22B 3/26 (2006.01)
Patent
CA 1083855
ABSTRACT A process for preparing a high surface area zero valent rhodium in the form of small, hollow, porous agglom- erates of rhodium particles by adjusting the pH of still heels from the hydroformylation reaction of unsaturated hydrocarbons with a base until a pH of from about 3 to 8 is attained, heat- ing the still heel in the presence of water to a temperature of about 115°C to 175°C until the rhodium separates, the ratio of water to still heel being from about 0.1:1 to 1:1 and recovering the rhodium particles. The rhodium so formed may be converted into a catalyst complex useful for liquid hydro- formylation reactions.
268350
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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