Process for preparing biodegradable detergent alkylate

Claim 1

IN THE PROCESS FOR PRODUCING BIOLOGICALLY SOFT DETERGENT ALKYLATE INVOLVING THE STEPS OF CONTACTING A PETROLEUM DISSTILATE HAVING A CARBON CONTENT WITHIN THE RANGE OF 9 TO 18 CARBON ATOMS AND BOILING WITHIN ABOUT THE RANGE 300-600*F. WITH A MOLECULAR SIEVE ZEOLITE TO SELECTIVELY ADSORB NORMAL PARAFFINS, AFTER WHICH THE PARAFFINS ARE DESORBED, THE DESORBED PARAFFINS ARE REACTED WITH CHLOROINE TO PRODUCE MONOCHLOROPARAFFINS AND SAID MONOCHLOROPARAFFINS ARE CONDENSED IN AN ALKYLATION ZONE WITH AN ARYL HYDROCARBON IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST FOLLOWING WHICH DETERGENT ALKYLATE IS RECOVERED FROM THE EFFLUENT OF THE ALKYLATION ZONE, THE IMPROVEMENT OF PASSING THE DESORBED PARAFFINS, TOGETHER WITH MONOCHLOROPARAFFINS AND ARYL HYDROCARBON, INTO CONTACT WITH FRIEDEL-CRAFTS CATALYST IN THE ALKYLATION ZONE MAINTAINED UNDER ALKYLATING CONDITIONS, EFFECTING ALKYLATION OF MONOCHLOROPARAFFINS AND ARYL HYDROCARBON, SEPARATING THE EFFLUENT FROM THE ALKYLATION ZONE INTO A DETEREGENT ALKYLATE FRACTION AND A PARAFFIN FRACTION, PASSING THE PARAFFIN FRACTION INTO A CHLORINATION ZONE AND THERE CONVERTING 10-50% OF THE PARAFFINS TO MONOCHLOROPARAFFINS BY REACTION WITH CHLORINE, AND INTRODUCING THE EFFLUENT FROM THE CHLORINATION ZONE INTO THE ALKYLATION ZONE AS THE ABOVE-SPECIFIED MONOCHLOROPARAFFINS.