CRYOGENIC PROCESS FOR THE SELECTIVE REMOVAL OF ACIDIC GAS FROM GAS MIXTURES USING A SOLVENT

摘要

CRYOGENIC PROCESS ALLOWING THE SELECTIVE ELIMINATION OF ACIDIC GAS FROM GAS MIXTURES BY MEANS OF A SOLVENT. /P P THIS PROCESS INCLUDES THE FOLLOWING STEPS: A.INJECTION OF NATURAL OR SYNTHETIC GAS IN A FIRST COLUMN OF ' ABSORPTION2 TO ABSORB SULPHYDRIC ACID; B. COOLING OF THE GAS PRACTICALLY CLEAR OF SULPHYDRIC ACID TO CONDENSATE PART OF THE CARBON GAS CONTAINED IN IT; C. INJECTION OF COOLED AND PARTLY CONDENSED GAS IN A SECOND ABSORPTION COLUMN7 IN ORDER TO REDUCE THE CARBON GAS CONTENT TO THE REQUIRED VALUE; D. REGENERATION OF THE SOLVENT OR SOLVENTS USED IN THE ABSORPTION OF ACID GAS, THE SOLVENT OR SOLVENTS USED BEING CHOSEN FROM ESTERS, ALCOHOLS AND ETHERS OF LOW MOLECULAR WEIGHT. /P P GAS TREATMENT WITH A HIGH CONTENT OF SULPHYDRIC ACID AND CARBONIC GAS.