Method of controlling temperatures in a fluidized catalyst hydrocarbon synthesis process

Claim 1

A CONTINUOUS METHOD FOR SYNTHESIZING HYDROCARBONS WHICH COMPRISES FORCING A MIXTURE OF CARBON MONOXIDE AND HYDROGEN UPWARDLY THROUGH A REACTION ZONE CHARGED WITH A MIXTURE OF SOLID ACTIVE SYNTHESIS CATALYST PARTICLES AND SOLID DILUENT PARTICLES IN FLUIDIZED CONDITION IN SAID REACTION ZONE AND MAINTAINED UNDER SYNTHESIS CONDITIONS OF TEMPERATURE AND PRESSURE, SAID SOLID ACTIVE SYNTHESIS CATALYST PARTICLES BEING OF RELATIVELY HIGH SPECIFIC GRAVITY AND OF SMALL, FLUIDIZED PARTICLE SIZE, SAID DILUENT PARTICLES HAVING A LOWER SPECIFIC GRAVITY THAN THE CATALYST PARTICLES AND HAVING A PARTICLE SIZE AT LEAST 2 TO 3 TIMES THE AVERAGE PARTICLE SIZE OF THE CATALYST PARTICLES, MAINTAINING SAID MIXTURE OF CATALYST PARTICLES AND SOLID DILUENT PARTICLES AS A DENSE FLUIDIZED BED IN THE REACTION ZONE WITH THE ACTIVE CATALYST PARTICLES DISPOSED IN MORE CONCENTRATED FORM IN THE UPPER PORTION OF THE DENSE FLUIDIZED BED AND THE SOLID DILUENT PARTICLES DISPOSED IN MORE CONCENTRATED FORM IN THE LOWER PORTION OF SAID BED BY REGULATING THE SUPERFICIAL VELOCITY OF THE UPFLOWING GASES WITHIN THE LIMITS OF 0.5 TO 3.0 FT. PER SECOND, THEREBY EQUALIZING TEMPERATURE CONDITIONS IN THE DENSE BED BY SUPPRESSING THE REACTION IN THE LOWER PORTION OF THE BED AND REMOVING A CRUDE SYNTHESIS PRODUCT FROM THE UPPER PORTION OF SAID REACTION ZONE.