Short contact time system

Claim 1

IN A SHORT CONTACT TIME HYDROCARBON CONVERSION PROCESS WHEREIN HYDROCARBON OIL IS CONTACTED WITH A RAPIDLY MOVING STEAM OF DISPERSE SOLIDS HEATED TO REACTION TEMPERATURE, HEREBY CONVERTING SAID OIL TO VAPOROUS MATERIAL AND CARBONACEOUS RESIDUE WHICH DEPOSITS ON SAID SOLIDS, THE IMPROVED METHOD OF RAPIDLY SEPARATING SAID VAPOROUS MATERIALS AND CONTACT SOLIDS WITHIN A PERIOD OF 0.10 TO 0.25 SECOND WHICH COMPRISES DOWNWARDLY PASSING SAID MIXTURE OF CONVERTED VAPOROUS MATERIAL AND SOLIDS THROUGH A SEPARATION ZONE SO AS TO ACCELERATE SAID SOLIDS TO A VELOCITY GREATER THAN 30 FT./SECOND, CONCENTRATING SAID SOLIDS ALONG A VERTICAL BOUNDARY OF SAID SEPARATION ZONE SO AS TO FORM A VERTICALLY DISPOSED SECTION OF HIGH SOLIDS CONCENTRATION AND AN OPPOSITELY DIRECTED SECTION OF LOW CONCERTRATION AND LATERALLY WITHDRAWING SAID VAPOROUS MATERIALS THROUGH A CONFINED PASSAGEWAY FROM THE SECTION OF LOW SOLIDS COCERNTRATION IN RESPONSE TO THE INTERIAL FORCES EXERTED BY SAID RAPIDLY FLOWING SOLIDS AND INERTIAL FORCES EXERTED BY SAID RAPIDLY MATERIALS.