Control of foaming and loss of acid in concentration of sulfuric acid

Claim 1

A METHOD OF RECEIVING ACID IN THE CONCENTRATION OF SPENT DILUTE SULFURIC ACID FROM A PETROLEUM REFINERY OPERATION WHICH COMPRISES THE STEPS OF SEPARATELY INTRODUCING HOT FUEL GASES AT AN ELEVATED TEMPERATURE OF ABOUT 1200* F. INTO FIRST AND SECOND POOLS OF DILUTE SULFURIC ACID BELOW THE SURFACE OF SAID POOLS TO CONCENTRATE SAID DILUTE SULFURIC ACID BY REMOVING WATER THEREFROM AND TO FORM FIRST AND SECOND GASEOUS STREAMS CONTAINING A SUSPENSION OF ACID INCLUDING ORGANIC BODIES AND CARBONACEOUS MATERIAL AND FIRST AND SECOND AT LEAST PARTIALLY CONCENTRATED ACID STREAMS, SAID FIRST POOL BEING AT A TEMPERATURE IN THE RANGE FROM ABOUT 250* TO ABOUT 290* F. AND BEING FORMED FROM SAID SPENT SULFURIC ACID AND SAID SECOND POOL BEING AT A TEMPERATURE IN THE RANGE FROM ABOUT 350* TO ABOUT 380* F. AND BEING FORMED FROM SAID FIRST PARTIALLY CONCENTRATED ACID STREAM, SEPARATELY RECOVERING SAID GASEOUS STREAMS, SEPARATELY CONTACTING THE GASEOUS STREAMS WITH A LIQUID STREAM OF SAID SPENT DILUTE SULFURIC ACID HAVING AN H2SO4 CONCENTRATION IN THE RANGE BETWEEN ABOUT 50% AND ABOUT 60%, THE CONCENTRATION OF H2SO4 IN THE SUSPENSION IN THE GASEOUS STREAMS BEING IN THE RANGE BETWEEN ABOUT 60% AND ABOUT 85%, SAID LIQUID STREAMS BEING AT A TEMPERATURE ABOUT 140* TO ABOUT 160* F. AND THE TEMPERATURE OF THE GASEOUS STREAMS BEING ABOUT 240* TO ABOUT 300* F., TO FORM FIRST AND SECOND COOLED ADMIXTURES, SEPARATELY INTRODUCING THE ADMIXTURES TANGENTIALLY INTO FIRST AND SECOND CYCLONE SEPARATING ZONES, SEPARATING THE ADMIXTURES IN SAID SEPARATION ZONES INTO FIRST AND SECOND LIQUID ACID PHASES AND FIRST AND SECOND GASEOUS PHASES, AND RECOVERING THE FIRST AND SECOND LIQUID ACID PHASES.

Claim 2

A METHOD OF RECEIVING ACID IN THE CONCENTRATION OF SPENT DILUTE SULFURIC ACID FROM A PETROLEUM REFINERY OPERATION WHICH COMPRISES THE STEPS OF SEPARATELY INTRODUCING HOT FUEL GASES AT AN ELEVATED TEMPERATURE OF ABOUT 1200* F. INTO FIRST AND SECOND POOLS OF DILUTE SULFURIC ACID BELOW THE SURFACE OF SAID POOLS TO CONCENTRATE SAID DILUTE SULFURIC ACID BY REMOVING WATER THEREFROM AND TO FORM FIRST AND SECOND GASEOUS STREAMS CONTAINING A SUSPENSION OF ACID INCLUDING ORGANIC BODIES AND CARBONACEOUS MATERIAL AND FIRST AND SECOND AT LEAST PARTIALLY CONCENTRATED ACID STREAMS, SAID FIRST POOL BEING AT A TEMPERATURE IN THE RANGE FROM ABOUT 250* TO ABOUT 290* F. AND BEING FORMED FROM SAID SPENT SULFURIC ACID AND SAID SECOND POOL BEING AT A TEMPERATURE IN THE RANGE FROM ABOUT 350* TO ABOUT 380* F. AND BEING FORMED FROM SAID FIRST PARTIALLY CONCENTRATED ACID STREAM, SEPARATELY RECOVERING SAID GASEOUS STREAMS, SEPARATELY CONTACTING THE GASEOUS STREAMS WITH A LIQUID STREAM OF SAID SPENT DILUTE SULFURIC ACID HAVING AN H2SO4 CONCENTRATION IN THE RANGE BETWEEN ABOUT 50% AND ABOUT 60%, THE CONCENTRATION OF H2SO4 IN THE SUSPENSION IN THE GASEOUS STREAMS BEING IN THE RANGE BETWEEN ABOUT 60% AND ABOUT 85%, SAID LIQUID STREAMS BEING AT A TEMPERATURE ABOUT 140* TO ABOUT 160* F. AND THE TEMPERATURE OF THE GASEOUS STREAMS BEING ABOUT 240* TO ABOUT 300* F., TO FORM FIRST AND SECOND COOLED ADMIXTURES, SEPARATELY INTRODUCING THE ADMIXTURES TANGENTIALLY INTO FIRST AND SECOND CYCLONE SEPARATING ZONES, SEPARATING THE ADMIXTURES IN SAID SEPARATION ZONES INTO FIRST AND SECOND LIQUID ACID PHASES AND FIRST AND SECOND GASEOUS PHASES, AND RECOVERING THE FIRST AND SECOND LIQUID ACID PHASES.