Sodium hypochlorite is an effective by-product in the chlor-alkali production in chlorine equilibrium and waste gas treatment.When start-up and shut-down are frequent in the chlor-alkali plant

a over bulged hypochlorite stock often appears.If the large quantity of hypochlorite is directly discharged

it will cause heavy pollution and material waste

and it will affect the normal plant running when the bulged hypochlorite stock gets worse.Based on the decomposition of hypochlorite under acidic condition

a reaction unit was designed in recycle use of the hypochlorite solution to produce NaCl useful for electrolysis and chlorine gas for market sale.In this way the over bulged hypochlorite stock problem could be solved.Not only there is no hypochlorite discharged

but also the environment could be protected and economic benefit could be achieved by recycle use of hypochlorite.The investment will be recovered in 2—3.5 years.