Method of regenerating adsorptive material

Claim 1

THE METHOD OF REVIVIFYING FINELY DIVIDED POWDERED ABSORBENT CONTACT MATERIAL WHICH HAS BECOME DEACTIVATED BY LIQUID PHASE CONTACT WITH AN OIL IN A DECOLORIZATION PROCESS WHICH COMPRISES SUBJECTING THE SPENT ABSORBENT BEARING OILY MATERIAL AND NON-VAPORIZABLE CARBONACEOUS DEPOSITS TO WASHING WITH A PETROLEUM NAPHTHA TO EFFECT REMOVAL OF THE OILY MATERIAL EFFECTING A PARTIAL SEPARATION OF NAPTHA FROM THE ABSORBENT AND THE SUPPLYING THE SPENT ADSORBENT BEARING OCCULDED NAPTHA AND NON-VAPORIZABLE CARBONACEOUS CONTAINING DEPOSITS INTO THE UPPER SECTION OF A CONFIND DRYING ZONE AT A TEMPERATURE SUBSTANTIALLY BELOW THAT REQUIRED FOR COMBUSTION OF SAID CARBONACEOUS CONTAINING, MIXING THE SPENT ABSORBENT WITH HOT REGENERATION ADSORBENT TO HEAT THE SPENT ADSORBENT AND TO VAPORIZE SAID NAPHTTHA, MAINTAINING THE MIXED SOLIDS WITHIN SAID DRYING ZONE AS A FLUIDIZED DESCENDING BED OF POWDERED MATERIAL BY PASSING STEAM UPWARDLY THROUGH SAID BEDF TO EFFECT FLUIDIZATION THEREOF, EFFECTING A SUBSTANTIAL SEPARATION OF THE STEAM AND NAPHTHA VAPORS FROM SAID BED IN THE UPPER SECTION OF SAID DRYING ZONE AND WITHDRAWING THE SEPARATED GASIFICATION MATERIAL FROM SAID ZONE, WITHDRAWING THE MIXED REGENERATED ADSORBENT AND SPENT CONTAMINATED BEARRING ABSORBENT SUBSTANTIALLY FREED OF NAPHTHA FROM THE LOWER SECTION OF SAID DRYING ZONE, DISPERSING THE MIXED ADSORBENT FROM SAID DRYING ZONE IN A STREAM OF OXIDIZING GAS AND INTRODUCISNG SAID STREAM INTO THE LOWER SECTION OF A CONFINED REGENERATION ZONE OF LARGE HORIZONTAL CROSS SECTIONAL AREA, PASSING THE GAS UPWARDLY THROUGH SAID REGENERATION ZONE AT SUCH VERTICAL VELOCITY AS TO MAINTAIN THE ADSORBENT AS A SUSPENDED DENSE TURBULENT MASS THEREIN WHILE EFFECTING THE BURNING OF SAID CONTAMINANT, PERMITTING THE ADSORBENT TEMPERATURE TO RISE DUE TO THE CONTAMINANT BURNING, EFFECTING A SEPARATING OF REGENERATED ABSORBENT FROM GASEOUS REGENERATION PRODUCTS IN THE UPPER SECTION OF SAID REGENERATION ZONE AND WITHDRAWING SAID GASEOUS PRODUCTS THEREFROM, WITHDRAWING A PORTION OF THE HOT REGENERATED ADSORBENT FROM SAID REGENERATION ZONE AND COOLING IT FOR REUSE IN SAID OIL DECOLORIZATION PROCESS, AND FLOWING THE REMAINDER OF THE REGENERATED ADSORBENT AS AN AERATED GRAVITATING STREAM FROM THE UPPER SECTION OF SAID REGENERATION ZONE INTO THE UPPER SECTION OF SAID DRYING ZONE TO MIX WITH SAID SPENT ADSORBENT AS AFORESAID, AND MAINTAINING THE PROPORTION OF CONTAMINANT DEPOSIT TO ADSORBENT AND THE TEMPERATURE OF THE MIXED ADSORBENT STREAM PASSING FROM SAID DRYING ZONE TO SAID REGENERATION ZONE AT LEVELS WHICH WILL PERMIT ADSORPTION BY THE ADSORBENT OF AT LEAST MOST OF THE HEAT RELEASED BY CONTAMINANT BURNING WITHOUT ITS TEMPERATURE REACHING A HEAT DAMAGING LEVEL BY CONTROLLING THE AMOUNT OF HOT REGENERATED ADSORBENT PASSED FROM SAID REGENERATION ZONE TO SAID DRYING ZONE AND THE AMOUNT OF NAPHTHA IN THE SPENT ADSORBENT SUPPLIED TO SAID DRYING ZONE, WHEREBY THE ADSORBENT IS REGENERATED WITHOUT THE USE OF A HEAT TRANSFER FLUID AND THE NAPHTHA IS VAPORIZED FROM THE SPENT ADSORBENT BY MEANS OF HEAT RECOVERED FROM THE CONTAMINANT BURNING.

Claim 2

THE METHOD OF REVIVIFYING FINELY DIVIDED POWDERED ABSORBENT CONTACT MATERIAL WHICH HAS BECOME DEACTIVATED BY LIQUID PHASE CONTACT WITH AN OIL IN A DECOLORIZATION PROCESS WHICH COMPRISES SUBJECTING THE SPENT ABSORBENT BEARING OILY MATERIAL AND NON-VAPORIZABLE CARBONACEOUS DEPOSITS TO WASHING WITH A PETROLEUM NAPHTHA TO EFFECT REMOVAL OF THE OILY MATERIAL EFFECTING A PARTIAL SEPARATION OF NAPTHA FROM THE ABSORBENT AND THE SUPPLYING THE SPENT ADSORBENT BEARING OCCULDED NAPTHA AND NON-VAPORIZABLE CARBONACEOUS CONTAINING DEPOSITS INTO THE UPPER SECTION OF A CONFIND DRYING ZONE AT A TEMPERATURE SUBSTANTIALLY BELOW THAT REQUIRED FOR COMBUSTION OF SAID CARBONACEOUS CONTAINING, MIXING THE SPENT ABSORBENT WITH HOT REGENERATION ADSORBENT TO HEAT THE SPENT ADSORBENT AND TO VAPORIZE SAID NAPHTTHA, MAINTAINING THE MIXED SOLIDS WITHIN SAID DRYING ZONE AS A FLUIDIZED DESCENDING BED OF POWDERED MATERIAL BY PASSING STEAM UPWARDLY THROUGH SAID BEDF TO EFFECT FLUIDIZATION THEREOF, EFFECTING A SUBSTANTIAL SEPARATION OF THE STEAM AND NAPHTHA VAPORS FROM SAID BED IN THE UPPER SECTION OF SAID DRYING ZONE AND WITHDRAWING THE SEPARATED GASIFICATION MATERIAL FROM SAID ZONE, WITHDRAWING THE MIXED REGENERATED ADSORBENT AND SPENT CONTAMINATED BEARRING ABSORBENT SUBSTANTIALLY FREED OF NAPHTHA FROM THE LOWER SECTION OF SAID DRYING ZONE, DISPERSING THE MIXED ADSORBENT FROM SAID DRYING ZONE IN A STREAM OF OXIDIZING GAS AND INTRODUCISNG SAID STREAM INTO THE LOWER SECTION OF A CONFINED REGENERATION ZONE OF LARGE HORIZONTAL CROSS SECTIONAL AREA, PASSING THE GAS UPWARDLY THROUGH SAID REGENERATION ZONE AT SUCH VERTICAL VELOCITY AS TO MAINTAIN THE ADSORBENT AS A SUSPENDED DENSE TURBULENT MASS THEREIN WHILE EFFECTING THE BURNING OF SAID CONTAMINANT, PERMITTING THE ADSORBENT TEMPERATURE TO RISE DUE TO THE CONTAMINANT BURNING, EFFECTING A SEPARATING OF REGENERATED ABSORBENT FROM GASEOUS REGENERATION PRODUCTS IN THE UPPER SECTION OF SAID REGENERATION ZONE AND WITHDRAWING SAID GASEOUS PRODUCTS THEREFROM, WITHDRAWING A PORTION OF THE HOT REGENERATED ADSORBENT FROM SAID REGENERATION ZONE AND COOLING IT FOR REUSE IN SAID OIL DECOLORIZATION PROCESS, AND FLOWING THE REMAINDER OF THE REGENERATED ADSORBENT AS AN AERATED GRAVITATING STREAM FROM THE UPPER SECTION OF SAID REGENERATION ZONE INTO THE UPPER SECTION OF SAID DRYING ZONE TO MIX WITH SAID SPENT ADSORBENT AS AFORESAID, AND MAINTAINING THE PROPORTION OF CONTAMINANT DEPOSIT TO ADSORBENT AND THE TEMPERATURE OF THE MIXED ADSORBENT STREAM PASSING FROM SAID DRYING ZONE TO SAID REGENERATION ZONE AT LEVELS WHICH WILL PERMIT ADSORPTION BY THE ADSORBENT OF AT LEAST MOST OF THE HEAT RELEASED BY CONTAMINANT BURNING WITHOUT ITS TEMPERATURE REACHING A HEAT DAMAGING LEVEL BY CONTROLLING THE AMOUNT OF HOT REGENERATED ADSORBENT PASSED FROM SAID REGENERATION ZONE TO SAID DRYING ZONE AND THE AMOUNT OF NAPHTHA IN THE SPENT ADSORBENT SUPPLIED TO SAID DRYING ZONE, WHEREBY THE ADSORBENT IS REGENERATED WITHOUT THE USE OF A HEAT TRANSFER FLUID AND THE NAPHTHA IS VAPORIZED FROM THE SPENT ADSORBENT BY MEANS OF HEAT RECOVERED FROM THE CONTAMINANT BURNING.