| PATENT ASSIGNEE'S COUNTRY | Finland |
| UPDATE | 12.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Mfg process - Reacting C4 isoolefins of olefinic hydrocarbon feedstock with an alkanol in presence of catalyst in reaction zone to form reaction mixt contg tert. alkyl ether - Feeding mixt to distn. column at feed point between bottom & top of column - Distn - Recovering alkyl ether & C5-C7 hydrocarbons with the bottoms prodt of distn. - Withdrawing an azeotrope formed by unreacted C4 hydro carbons & alkanol as an overhead prodt of distn - Withdrawing from above the feed point of reaction mixt a part of liquid flow of column to form a side drawoff - Recirculating side drawoff to reaction zone |
| PATENT PHOTOCOPY | Available on request |
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