Manufacture of multi-layered granular fertilizers

Claim 1

A CONTINUOUS PROCESS FOR THE PRODUCTION OF A MULTILAYERED GRANUALR AMMONIUM SALT FERTILISER WHICH COMPRISES PROVIDING QUANTITIES OF AMMONIA AND AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID, SULPHURIC ACID AND NITRIC ACID, REACTING SAID QUANTITIES OF AMMONIA AND ACID ON GRANULES COMPRISING AMMONIUM SALE IN A LOCALIZED REGION OF A REACTION CHAMBER WHILE MAINTAINING THE MOISTURE CONTENT OF SAID GRANULES THEREIN AT A LEVEL BELOW ABOUT 1% THEREBY FORMING A LAYER OF AMMONIUM SALT ON EACH OF SAID GRANULES, WITHDRAWING ALL OF SAID GRANULES FROM SAID LOCALIZED REGION OF SAID REACTION CHAMBER AND TRANSFERRING SAME TO A SECOND REGION IN SAID REACTION CHAMBER REMOTE FROM SAID LOCALIZED REGION, REMOVING A PORTION OF SAID GRANULES FROM SAID SECOND REGION OF SAID REACTION CHAMBER AND IN AN AMOUNT GREATER THAN THE AMOUNT OF THE ACID AND AMMONIA BEING ADDED TO SAID LOCALIZED R EGION OF SAID CHAMBER AND THEN SIZING SAID REMOVED GRANULES TO OBTAIN A DESIRED PRODUCT SIZE RANGE, RETURNING THE REMAINDER OF THE GRANULES FROM SAID SIZING OPERATION TO SAID CHAMBER RECIRCULATING WITHIN SAID CHAMBER THE REMAINDER OF SAID GRANULES FROM SAID SECOND REGION TO SAID LOCALIZED REGION WHILE MAINTAINING THE MOISTURE CONTENT OF THE RECIRCULATING GRANULES AT A LEVEL BELOW 1%, THE RATIO OF THE RATE OF RECIRCULATION TO THE RATE OF OBTAINING THE PRODUCT BEING AT LEAST 20:1, REACTING IN SAID LOCALIZED REGION SAID RECIRCULATED GRANULES WITH ADDITIONAL QUANTITY OF AMMONIA AND ACID WHILE CONTINUING TO MAINTAIN THE MOISTURE CONTENT OF SAID GRANULES IN SAID LOCALIZED REGION AT A LEVEL BELOW 1% THEREBY FORMING A FURTHER LAYER OF AMMONIUM SALT THEREON, AND REPEATING SAID REMOVAL, SIZING AND RECIRCULATION CYCLE TO OBTAIN A MULTI-LAYER GRANULAR AMMONIUM SALT FERTILISER AS THE END PRODUCT.