METHOD FOR COMPREHENSIVELY TREATING CLAUS TAIL GAS AND PRODUCING MANGANESE SULFATE

摘要

PROBLEM TO BE SOLVED: To comprehensively treat Claus tail gas and to produce manganese sulfate.;SOLUTION: A method for comprehensively treating Claus tail gas and producing manganese sulfate comprises the following steps of: spraying manganese dioxide slurry to a sulfur dioxide treatment device; introducing the Claus tail gas into the treatment device till the manganese dioxide in the slurry is less than or equal to 1.0 wt.%, and performing solid-liquid separation to obtain a manganese sulfate solution; introducing the Claus tail gas treated by the sulfur dioxide treatment device into a hydrogen sulfide treatment device, spraying the manganese sulfate solution, introducing ammonia gas, keeping the pH value of the solution between 5.5 and 6.0, and performing solid-liquid separation when manganese ions in the reaction solution are less than 200 ppm; washing the obtained solid phase by using hot water, performing solid-liquid separation, dissolving the solid phase in sulfuric acid, controlling the pH value of the solution to be between 3 and 3.5, and performing solid-liquid separation; and adding hydrogen peroxide into the filtrate to remove impurities, performing solid-liquid separation, evaporating and crystallizing the solution, and thus obtaining the manganese sulfate.;COPYRIGHT: (C)2014,JPO&INPIT