Process for the preparation of ketene

Details Process for the preparation of ketene Process for the preparation of ketene

1981-12-04

1984-06-19

Reamer, James H.

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

Organic compounds

Oxygen containing

C07C 4551

Patent

active

044554397

ABSTRACT:
In this process for the preparation of ketene by the thermal, catalytic cracking of acetic acid under reduced pressure, the hot cracked gases are cooled to approx. 0.degree. to -10.degree. C. and, in the course thereof, water, unreacted acetic acid and acetic anhydride are condensed. The quantity of acetic acid employed for the thermal cracking reaction should be 0.5 to 2.5 t.times.hours.sup.-1 .times.m.sup.-3, relative to the volume V of a shell-and-tube heat exchanger through which the cracked gas is passed. The pressure drop in the tubular heat exchanger should be 50 to 150 mbars and the surface/volume ratio should be 60 to 120 m.sup.-1.

REFERENCES:
patent: 2816143 (1957-12-01), Probst
patent: 2820058 (1958-01-01), Luke et al.
patent: 2967888 (1961-01-01), Altenschpfer et al.
patent: 3480676 (1909-11-01), Scheuber
Perry et al., "Chem. Engineers' Handbook", pp. 10-30 to 10-31, McGraw-Hill, (1979).

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