Steam cracking of light naphtha and preparation of resins

Claim 1

A PROCESS OF PREPARING A RESIN-FORMING FEED WHICH COMPRISES MIXING 60 TO 90 MOLE PERCENT OF STREAM AND CORRESPONDINGLY 10 TO 40 MOLE PERCENT OF A LIGHT VIRGIN NAPHTHA FRACTION HAVING A BOILING RANGE BETWEEN 120* AND 330*F. AND SUBSTANTIALLY FREE OF LOWER BOILING HYDROCARBONS, SAID FRACTION CONTAINING NOT MORE THAN 5 WT. PERCENT OF C5 AND LOWER HYDROCARBONS, 40 TO 100 WT. PERCENT OF C6-C7 PARAFFINS, 0 TO 60 WT. PERCENT OF C6-C7 NAPHTHENSES AND 0 TO 10 WT. PERCENT OF C6-C7 AROMATICS, PASSING THIS MIXTURE THROUGH A STREAM CRACKING ZONE AT A TEMPERATURE BETWEEN 1200* AND 1500*F. AND A PRESURE OF BETWEEN ABOUT 6 TO 25 P.S.I.G., COVERTING 35 TO 70 WEIGHT PERCENT OF SAID NAPHTHA FRACTION TO C3 AND LOWER HYDROCARBONS IN SAID CRACKING ZONE, AND FRACTIONALLY DISTILLING THE PRODUCT TO SEGREGATE A POLYMERIZABLE FRACTION CONTAINING ABOUT 10 TO 30 WEIGHT PERCENT DIOLEFINS AND BOILING LARGELY BETWEEN 60* F. AND 160* F.