Claims
- 1. In a process for the production of aldehydes and alcohols by contacting olefins of the group of C.sub.11 -C.sub.14 alpha olefins with carbon monoxide and hydrogen in a hydroformylation zone at a temperature of about 100.degree. to about 300.degree. C. under a pressure of 1 to 200 psig in the presence of a cobalt catalyst consisting of cobalt in complex combination with carbon monoxide and a tertiary organo-phosphine to form a product phase containing unreacted olefins, paraffins, saturated aldehydes and alcohols, catalyst residue and heavy end; which are separated, the improvement whereby said separation is effected by the steps of metering said phase to a thin film evaporating zone, mechanically forming a thin film of said phase on a heated surface; continuously wiping said film on said surface at a temperature range of 200.degree. to 250.degree. C for an exposure time for said residue of 5 to 55 seconds thereby separating a distillate containing unreacted olefins, paraffins, aldehydes and alcohols, from said catalyst residue and heavy end; fractionating said distillate to separate the components thereof and directly recycling at least a part of said residue to said hydroformylation zone.
- 2. The process of claim 1 wherein said distillation is carried out at a temperature of 150.degree. to 500.degree. F. under a pressure ranging from 0.001 to 50 mm Hg.
- 3. The process of claim 1 wherein said distillation is carried out at a temperature ranging from 150.degree. to 250.degree. F. under a pressure ranging from 0.001 to 10 mm Hg.
- 4. The process of claim 1 wherein said olefins consist of C.sub.11 -C.sub.14 alpha olefins obtained by wax cracking.
- 5. The process of claim 1 wherein the entire residue is recycled to the hydroformylation zone.
- 6. The process of claim 7 wherein said residue is mixed with fresh make up catalyst as it is recycled to said zone.
- 7. The process of claim 1 wherein the major portion of said residue is recycled to said hydroformylation zone while the remainder is passed to a catalyst recovery zone and then sent to said hydroformylation zone.
CROSS-REFERENCE TO CO-PENDING APPLICATION
This application is a continuation-in-part of coassigned U.S. application Ser. No. 366,387 filed June 4, 1973, and now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
366387 |
Jun 1973 |
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