After being neutralized by ammonium hydroxide and sulfuric acid, it is obtained by crystallization, centrifugation and drying. Neutralization of ammonia and sulfuric acid is carried out at about 100 ° C for neutralization reaction, and the resulting ammonium sulfate crystal slurry is centrifuged and dried to obtain a finished ammonium sulfate. The 2NH3+H2SO4→(NH4)2SO4 recovery method is obtained by recovering ammonia gas from coke oven gas and neutralizing it with sulfuric acid.
