Also Called: Petroleum gas; [A complex combination of olefinic and paraffinic hydrocarbons having carbon numbers in the range of C3 through C5 which are used as alkylation feed. Ambient temperatures normally exceed the critical temperature of these combinations.]; Gases (petroleum), C3-5 olefinic-paraffinic alkylation feed [Petroleum gas](Note: A complex combination of olefinic and paraffinic hydrocarbons having carbon numbers in the range of C3 through C5 which are used as alkylation feed. Ambient temperatures normally exceed the critical temperature of these combinations.);Gases (petroleum), C3-5 olefinic-paraffinic alkylation feed;[Acomplex combination of olefinic and paraffinic hydrocarbons having carbon numbers in the range of C3 through C5 which are used as alkylation feed. Ambient temperatures normally exceed the critical temperature of these combinations.];Gases (petroleum), C3-5 olefinic- paraffinic alkylation feed;Petroleum gas (A complex combination of olefinic and paraffinic hydrocarbons having carbon numbers ;Petroleum gas (A complex combination of olefinic and paraffinic hydrocarbons having carbon numbers in the range of C3 through C5 which are used as alky lation feed. Ambient temperatures normally exceed the critical temperature of these combinations.);Petroleum gas (A complex combination of olefinic and paraffinic hydro carbons having carbon numbers in the range of C3 through C5 which are used as alkylation feed. Ambient temperatures normally exceed the critical temperature of these combinations.)