Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Patent
1981-08-03
1982-11-16
Waltz, Thomas A.
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
585833, 585860, 585863, 585864, C07C 717
Patent
active
043595960
ABSTRACT:
Liquid salts such as quaternary phosphonium and ammonium salts of halides, acids, or more complex anions can be utilized to extract aromatics from mixed aliphatic/aromatic hydrocarbon feeds such as isomerization process feed streams, cat naphthas, lube stocks, and the like. Such salts show the required solubilities in various solvents to exhibit a distinct selectivity advantage over more commonly used extraction solvents such as sulfolane in the extraction of benzene and other aromatics from heptane and other aliphatic feedstreams.
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Tetrahedron Letters, vol. 21, pp. 3037-3038.
Howard Kent A.
Mitchell Howard L.
Waghorne Robert H.
Exxon Research and Engineering Co.
North Robert J.
Pal A.
Waltz Thomas A.
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