Generation of sulphur trioxide from oleum

Details Generation of sulphur trioxide from oleum Generation of sulphur trioxide from oleum

1985-11-21

1987-05-05

Doll, John

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423522, 260686, C01B 1776, C07B 4502

Patent

active

046631429

ABSTRACT:
A continuous process for the generation of sulphur trioxide from oleum suitable for use in the sulphonation of organic compounds which comprises continuously introducing oleum feed to a sulphur trioxide desorption tower; continuously introducing a recycled dry feed air stream to said desorption tower, whereby a gaseous mixture of sulphur trioxide in air is produced; collecting spent oleum from said desorption tower; introducing said gaseous mixture to a sulphonation reactor; and recycling spent gaseous mixture from said reactor to said desorption tower as said feed air stream. The process offers reduced environmental pollution and operating costs.

REFERENCES:
patent: 1498168 (1924-06-01), Hill
patent: 1605004 (1926-11-01), Shapleigh
patent: 2407822 (1946-09-01), Fahnestock et al.
patent: 3296096 (1967-01-01), Portman et al.
patent: 3853502 (1974-12-01), Dorr et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 22, 3rd edition, Wiley and Sons, New York, 1983, pp. 28;29.

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