Process for preparation of 4,4,8,8,10-pentamethylbicyclo[4,4,0]-

Details Process for preparation of 4,4,8,8,10-pentamethylbicyclo[4,4,0]- Process for preparation of 4,4,8,8,10-pentamethylbicyclo[4,4,0]-

1987-08-14

1988-11-29

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568353, C07C 4562

Patent

active

047883421

ABSTRACT:
4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2), is produced from the bottom product of the acetone condensation reaction collecting in the production of isophorone by fractionation. A ketone blend consisting essentially of C.sub.15 compounds where the main components are isomers [B] and [C] as shown in the general formulas: ##STR1## is isolated. This ketone blend is selectively hydrated in the presence of a noble metal catalyst at hydrogen pressures of 20 to 250 mbars and at temperatures between 25.degree. and 150.degree. C. The 4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2) is obtained by rectifying the hydration output.

REFERENCES:
patent: 3337423 (1967-08-01), Schmitt et al.
patent: 3337632 (1967-08-01), Schmitt et al.
patent: 3337633 (1967-08-01), Schmitt et al.
patent: 4165339 (1979-08-01), Reichle
patent: 4535187 (1985-08-01), Papa et al.

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