how is ammonium sulphate made in industrys?

Answer 1

Ammonium sulpate is prepared commercially by reacting ammonia with sulpuric acid (H2SO4). Ammonium sulfate is prepared commercially from the ammoniacal liquor of gas-works and is purified by recrystallisation. It forms large rhombic prisms, has a somewhat saline taste and is easily soluble in water. The aqueous solution on boiling loses some ammonia and forms an acid sulpate.