7-(Alpha-methyl-alpha-alkenyl)substituted 8-hydroxyquinolines and process for the preparation thereof
AssigneeAshland Oil, Inc.
InventorsHarvey J. Richards, Bhupendra C. Trivedi
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Abstract
A class of hydrocarbyl substituted 8-hydroxyquinolines wherein the indicated substituent arises through the direct alkylation of said quinolinol with a ketone obtained by condensing methyl ketone with a hindered aldehyde. These alkylates are useful metal collectors in hydrometallurgical extraction processes designed for the recovery of metal values from dilute aqueous solutions thereof.
Claims10
A compound of the formula ##STR6## wherein R and R' represent alkyl groups having a sum total of from 4-18 carbon atoms.
A process for preparing 7-(alpha-methyl-alpha-alkenylates) of 8-hydroxyquinoline which comprises reacting at a temperature of from about 200.degree.-260.degree. C. one mole of 8-hydroxyquinoline with from 1.1 to 2 moles of a ketone of the formula:
- ##STR7## wherein R" represents H or a C.sub.1 - C.sub.21 hydrocarbyl group, to effect the condensation of said reactants and the concomitant removal of water of dehydration from the condensate and thereupon distilling the reaction product to recover the resultant alkenylate.
Dependencies are inferred from the claim text.