BLEACHING POWDER ( Chlorinated lime)

BLEACHING POWDER (Chlorinated lime)

BRAND NAME:- BLEACHING POWDER, BLEACHING AGENT

BLEACHING powder is an inorganic compound .Obtained by the action of chlorine on lime; resulting in a mixture of calcium chloride and calcium hypochlorite. On exposure,it decomposes releasing 30-35% W/W chlorine .

PREPARATION of BLEACHING POWDER :-

The manufacture of bleaching powder is carried out in Bachmann’s plant as follows:-

The entire system is prepared for the manufacturing of bleaching powder, containing a vertical cast-iron tower packed with a hopper at the top, two inlets near the base (one for chlorine and the other for hot air) and an exit for waste gases near the top. This tower is then fitted with shelves that are placed at varying heights with rotating rakes. The shelves are a total of eight in number. Slaked lime is introduced into the hopper. It eventually comes in contact with chlorine moving slowly in the upward direction. The bleaching powder is then collected at the base in the barrel area of the tower.

Conditions to be looked after during the manufacture:

•The chlorine used should be dilute in nature.

•The temperature should be maintained below 40°C.

PROPERTIES OF BLEACHING POWDER:-

Bleaching Powder is a pale yellowish powder that possesses a strong smell of chlorine.

It performs a reaction with dilute acids to produce chlorine.

It is soluble in cold water. The lime is left as an insoluble residue on dilution.

On reaction with an excess of a dilute, for instance, dilute sulphuric acid, the chlorine from the bleaching powder gets liberated.

Thereby, the chlorine that is produced as a result of the action of dilute acid on bleaching powder acts as a bleaching agent. Therefore, chlorine is the bleaching agent in bleaching powder.

USED:-

It is used as a disinfectant for drinking water, swimming pools and sanitizer for privies ,etc.

SIDE EFFECTS:- UNKNOWN

DOSE:- UNKNOWN

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