Process for the production of an olefin-free tert, amyl alkyl ether-rich fraction and a n-pentane rich paraffin fraction
AssigneeInstitut Francais du Petrole
InventorsPatrick Sarrazin, Jean Cosyns, Alain Forestiere, Jean-Paul Boitiaux
Life of this patent
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Abstract
The simultaneous production of an olefin-free, tert.amyl alkyl, ether-rich fraction an n-pentane-rich paraffin fraction, wherein a charge based on isopentenes is hydrogenated (1) under appropriate conditions to bring about a distribution of the methyl butenes close to thermodynamic equilibrium and then the hydrogenation effluent is treated in an etherification zone (2).
Claims12
A process for the simultaneous production of an olefin-free, tert-amyl alkyl ether-rich fraction and an n-pentane-rich paraffin fraction, comprising (a) in a first stage, hydrogenating a charge containing isopentenes (methyl butenes) cyclopentene and cyclopentadiene under hydrogenation and isomerization conditions sufficient to eliminate diolefins, cycloolefins, and straight-chain olefins and to obtain a distribution of the methyl butenes close to thermodynamic equilibrium;
- (b) in a second stage, feeding at least a fraction of the resultant hydrogenation effluent into an etherification zone for etherifying iso-olefins therein with an alcohol;
- and (c) distilling the resultant etherified stream from the etherification zone to collect (A) an olefin-free tert-amyl alkyl ether-rich fraction containing cyclopentane and (B) an n-pentane-rich fraction free of straight-chain olefins and cycloolefins.
Dependencies are inferred from the claim text.