Isolation of 3-methyl-1-butene from a hydrocarbon stream

Patent · Tue Dec 16 04:00:00 EST 1986

OSTI ID:6856007

Drake, C A

A process is described for recovering 3-methyl-1-butene from a hydrocarbon stream containing 3-methyl-1-butene and compounds which form azeotropes with 3-methyl-1-butene comprising extractive distillation of the hydrocarbon stream with a solvent mixture comprising dimethylformamide and sulfolane solvent mixture present in an amount ranging from about 0.1 to about 20 times the weight of the hydrocarbon stream. The dimethylformamide in the dimethylformamide/Sulfolane solvent mixture is present in an amount ranging from about 30 weight percent to about 70 weight percent based on the weight of the mixture. This separates insolubles containing the 3-methyl-l-butene as the overhead product stream from the bottoms product containing soluble compounds, the compounds that form azeotropes with 3-methyl-l-butene and the solvent mixture and thereafter recovering the 3-methyl-1-butene from the insolubles.

• Assignee: Phillips Petroleum Co., Bartlesville, OK
• Patent Number(s): US 4629533
• OSTI ID: 6856007
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
ALKYL RADICALS
AMIDES
AZEOTROPE
BUTENES
DISPERSIONS
DISTILLATION
EXTRACTION
FORMAMIDE
HYDROCARBONS
METHYL RADICALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
QUANTITY RATIO
RADICALS
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SOLVENTS