Method for treatment of gases

Claim 1

IN A PROCESS FOR THE REMOVAL OF A GASEOUS COMPONENT FROM A GASIFORM STREAM CONTAINING SAID COMPONENT, THE IMPROVEMENT WHICH COMPRISES INJECTING SAID STREAM INTO A FIRST ZONE CONTAINING A BED OF FINELY DIVIDED PARTICLES ACTIVE TO COMBINE SELECTIVELY WITH SAID COMPONENT, SAID STREAM BEING INJECTED AT A LINEAR VELOCITY SUFFICIENT TO FLUDIZE SAID PARTICLES BUT INSUFFICIENT TO PREVENT A NET DOWNFLOW OF SAID PARTICLES, INJECTING HOT GAS AT A TEMPERATURE OF NOT MORE THAN ABOUT 700*F. INTO A SECOND ZONE CONTAINING A FLUDIZED BED OF PARTICLES FROM SAID FIRST ZONE, THE LEVEL OF THE BED IN SAID FIRST ZONE BEING HIGHER THAN THE LEVEL OF THE BED IN SECOND ZONE, CONTINUOUSLY WITHDRAWING SAID PARTICLES AND ADSORBED COMPONENT FROM SAID FIRST ZONE AND TRANSFERRING THIS MIXTURE TO THE SECOND ZONE BY MEANS OF THE PRESSURE DUE TO THE DIFFERENCE IN LEVELS OF THE TWO BEDS, CONDUCTING THE OPERATION IN THEE SECOND ZONE SO THAT THE HOT FRESHLY REGENERATED PARTICLES THEREIN TEND TO SPILL OVER INTO A THIRD ZONE INTO WHICH RELATIVELY COOL GAS CONSISTING ESSENTIALLY OF UNCONDENSABLES PRESENT IN SAID GASIFORM STREAM IS INJECTED AT A RATE SUCH THAT THERE IS A NET DOWNFLOW OF SAID PARTICLES IN SAID THIRD ZONE, THE FLUDIZED BED IN THE THIRD ZONE HAVING A LEVEL LOWER THAN THE BED LEVEL IN THE SECOND ZONE, CONTINUOUSLY TRANSFERRING THE RESULTING COOLED REGENERATED PARTICLES FROM THE THIRD TO THE FRIST ZONE VI AN ADDITONAL CHARGE OF SAID GASIFORM STREAM, THE PRESSURE IN ALL THREE ZONES BEING SUBSTANTIALLY THE SAME, WITHDRAWUNG A GASEOUS STREAM FROM SAID FIRST ZONE FREE OF SAID COMPONENT AND REMOVING THE ENTIRE QUANTITY OF THIS STREAM FROM TH SYSTEM, WITHDRAWING AND COMBINING THE GASEOUS STREAMS FROM THE SECOND AND THIRD ZONES, COOLING THE RESULTING COMBINED GASEOUS STREAM AND SEPARTAING THE UNCONDENSABLES THEREFROM, DIVIDING SAID UNCONDENSABLES INTO TWO STREAMS, USING ONE OF SAID HEATING THE OTHER OF SAID STREAMS GAS IN THE THIRD ZONE, AND HEATING THE OTHER OF SAID STREAMS TO A TEMPERATURE OF NOT MORE THAN ABOUT 700*F. AND USIG IT AS THE FLUDIZING GAS IN SAID SECOND ZONE.