Phosphorus production

Claim 1

A PROCESS FOR HE PRODUCTION OF PHOSPHORUS WHICH COMPRISES: FLOWING A FLUID HYDROCARBON THROUGH A CRACKING ZONE CONTAINING A MASS OF FINELY DIVIDED PHOSPHATE ROCK TO MAINTAIN SAID PHOSPHATE ROCK IN A FLUIDIZED CONDITION; INTRODUCING PREHEATED INERT SOLIDS INTO SAID CRACKING ZONE INTO CONTACT WITH SAID FLUIDIZED MASS OF PHOSPHATE ROCK TO MAINTAIN SAID FLUIDIZED MASS AT A TEMPERATURE EFFECTIVE TO CAUSE CRACKING OF SAID FLUID HYDROCARBON WITH DEPOSITION OF CARBON ON SAID PHOSPHATE ROCK BUT BELOW TEMPERATURES AT WHICH SAID PHOSPHATE ROCK PARTICLES COALESCE AND AT WHICH PHOSPHATE ROCK IS REDUCED TO PHOSPHORUS; SEPARATING AND WITHDRAWING INERT SOLIDS FROM PHOSPHATE ROCK THUS COATED FROM SAID CRACKING ZONE; TRANSFERRING COATED PHOSPHATE ROCK FROM SAID CRACKING ZONE TO A REDUCTION ZONE; AND IN SAID REDUCTION ZONE CONTACTING COATED PHOSPHATE ROCK WITH SUBSTANTIALLY ALL OF THE INERT SOLIDS WITHDRAWN FROM SAID CRACKING ZONE AND PREHEATED TO A TEMPERATURE SUFFICIENTLY HIGH TO HEAT SAID COATED PHOSPHATE ROCK TO A TEMPERATURE SUBSTANTIALLY HIGHER THAN SAID CRACKING TEMPERATURES AT WHICH SAID ROCK PARTICLES WOULD COALESCE BUT FOR SAID COATING OF CARBON THEREON AND WHICH IS EFFECTIVE TO REDUCE SAID COATED PHOSPHATE ROCK TO PRODUCE ELEMENTAL PHOSPHORUS AS A PRODUCT OF THE PROCESS.