Purification of hydrocarbons by treatment with polyamines

Details Purification of hydrocarbons by treatment with polyamines Purification of hydrocarbons by treatment with polyamines

1980-11-28

1983-08-30

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

585836, 208236, C07C 710, C07C 711, C10G 2120

Patent

active

044018380

ABSTRACT:
Isoprene and butadiene are purified by treating a petroleum refinery C.sub.4 stream or petroleum refinery C.sub.5 stream which contain butadiene or isoprene or relatively pure butadiene or isoprene and carbon disulfide by treatment of these streams with from about 1 to about 7 equivalents of a polyamine. The polyamine reacts with the CS.sub.2 impurity to form the dithiocarbamate salt. The hydrocarbon is then separated from the dithiocarbamate salt and any excess unreacted polyamine by water washing this stream or by flash distilling of the hydrocarbon.

REFERENCES:
patent: 2045057 (1936-06-01), Schulze
patent: 2238201 (1941-04-01), Wilson et al.
patent: 2418047 (1947-03-01), Parkes et al.
Noller, Chemistry of Organic Compounds, 1965.

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