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US 6,197,163 B1Granted
Process for removing impurities from petroleum products
AssigneeCatalytic Distillation Technologies
InventorClaus-Peter Thomas Hälsig
Life of this patent
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Abstract
The impurity content, e.g. propionitrile, in a fraction containing C5 or C6 tertiary olefins obtained by cracking hydrocarbons is reduced by distilling with an alkanol and removing the impurity as a higher boiling point fraction.
Claims5
A process for the production of tertiary alkyl ethers which comprises
- (1) providing a liquid hydrocarbon feed comprising C4 to C6 tertiary olefins and a nitrogen-containing impurity
- (2) contacting the hydrocarbon feed with an alcohol selected from methanol, ethanol or mixtures thereof
- (3) distilling the hydrocarbon feed/alcohol mixture and removing the nitrogen-containing impurity as a fraction with a higher boiling point than a fraction containing the C4 to C6 tertiary olefins
- (4) reacting the fraction containing the C4 to C6 tertiary olefins with the alcohol over an acid catalyst to produce the corresponding tertiary alkyl ether.
1 more element
Dependencies are inferred from the claim text.