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Rohrtil S. A. Patents |
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Assignee: Rohrtil S. A.
Address: Lugano, CH
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4160718 |
Solvent extraction process |
July 10, 1979 |
| A continuous solvent extraction process for tar-sand uses a closed rotary contactor. A tar-sand/water slurry stream and a solvent stream are passed countercurrent through the contactor and three phases are formed: tar-sand solids at the bottom of the contactor, a barrier layer of water i |
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