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US 4,227,891 AGranted
Recovery of hydrocarbon vapors from air
AssigneeYoungstown Sheet and Tube Company
InventorsKeith D. Maguire, Royce A. Currieo
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Abstract
The recovery of a hydrocarbon capable of autopolymerization from an air stream by absorbing the hydrocarbon with a plasticizer and separating the hydrocarbon from the plasticizer by vacuum and atmospheric distillation.
Claims6
The process of recovering aliphatic or aromatic hydrocarbon vapors capable of auto-polymerization from air comprising,
- scrubbing an air stream containing said hydrocarbon vapors with a liquid plasticizer absorbent having substantially zero vapor pressure during the scrubbing step and which will not contaminate the hydrocarbon to absorb the hydrocarbon in the plasticizer,
- distilling the plasticizer and absorbed hydrocarbon under partial vacuum conditions to obtain a first distillate of plasticizer and the hydrocarbon,
- distilling the first distillate under atmospheric pressure to obtain a second distillate of the hydrocarbon,
- and separately recovering the hydrocarbon and the plasticizer.
1 more element
Dependencies are inferred from the claim text.