Preparation of .epsilon.-caprolactam by catalytic rearrangement

Details Preparation of .epsilon.-caprolactam by catalytic rearrangement Preparation of .epsilon.-caprolactam by catalytic rearrangement

1979-09-24

1981-02-03

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20104

Patent

active

042487820

ABSTRACT:
In a process for the preparation of .epsilon.-caprolactam by catalytic rearrangement of cyclohexanone-oxime in the gas phase at from 230.degree. to 450.degree. C. over a supported catalyst, containing boron trioxide, in a fluidized bed, wherein the catalyst is removed from the fluidized bed at the rate at which it becomes spent and is treated, in a fluidized state, with gases containing molecular oxygen at from 600.degree. to 900.degree. C., after which boron trioxide or boric acid is added to the fluidized catalyst, at from 300.degree. to 900.degree. C., before the catalyst is returned to the fluidized bed, the improvement that boron trioxide or boric acid of particle size from 0.05 to 1.5 mm is fed to the fluidized catalyst at one or more points.

REFERENCES:
patent: 3210338 (1965-10-01), Huber et al.
patent: 3350393 (1967-10-01), Petri et al.
patent: 3623575 (1972-01-01), Mannsmann et al.
patent: 3833560 (1974-09-01), Immel et al.
patent: 3849335 (1974-11-01), Immel et al.

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