Controlling coke laydown in a catalytic conversion process

Claim 1

IN A PROCESS FOR THE CATALYSTIC CONVERSION OF A HYDROCARBON FEED STREAM WHEREIN SAID STREAM, ALONG WITH AT LEAST ONE RECYCLE STREAM, IS CONTACTED WITH AN ACTIVE CATALYST OF DEFINABLE ACTIVITY AND SELECTIVETY FOR SAID CONVERSION, IN A REACTOR MAINTAINED UNDER CATALYSTIC CONVERSION CONDITIONS OF TEMPERATURE AND PRESSURE, SAID CATALYST BECOMING CONTAMINATED CATALYST BEING CIRCULATED FROM ON, AND SAID CONTAMINATED CATALYST BEING CIRCULATED FROM SAID REACTOR THROUGH A REGENERATOR WHEREIN SAID COKE IS BURNED, WITH THE EVOLUTION OF A FLUE GAS, BY CONTACT WITH AN OXYGEN-CONTANING GAS, THEREBY REGENERATING THE CATALYST AND ELEVATING ITS TEMPERATURE BEFORE ITS RETURN TO SAID REACTOR, AND WHEREIN REACTION PRODUCTS ARE REMOVED FROM SAID REACTOR AND ARE SEPARATED INTO AT LEAST ONE PRODUCT STREAM AND AT LEAST ONE RECYCLE STREAM, THE IMPROVEMENT IN SUCH PROCESS WHICH COMPRISES: (A) PRODUCING A PRIMARY INDICATOR SIGNAL CA INDICATIVE OF THE RATE OF COKE ACCUMULATION UPON THE CATALYST IN THE OVER-ALL REACTOR-REGENERATOR SYSTEM, SAID SIGNAL REPRESETING THE MATHEMATICAL RELATIONSHIP COMPRISED OF