PROCESS FOR THE MANUFACTURING OF CALCIUM CHLORIDEGrades 1) anhydrous CaCl2

2) dehydrate CaCl2.2H2O

3) hexahydrate. CaCl2.6H2O

1) Raw materialsa) Limestone (calcium carbonate) (solid lumps) CaCO3

source from mining of limestoneb) Hydrochloric acid (30%) solution in water (liquid state) HCl

Byproduct of chlorination plantsBy product of chloroalkali plants

c) Calcium hydroxide (solid powder) Ca (OH)2 From manufacturer

2) Reaction 1) CaCO3 + 2HCl -------→→ CaCl2 + H2O + CO2

Molecular weight kgs 100 2* 36.5 110.99 18 44

2 CO2 + Ca (OH)2 -----→ CaCO3 + H2O Molecular weight kgs 44 74.09 100 18

3 Ca(OH)2 + 2 HCL -----→ CaCl2 + 2 H2OMolecular weight 74.09 2* 36.5 110.99 2*18

3) Process description:-a) Hydrochloric acid is charged into a acid proof brick lined tank b) Lime stone/ calcium hydroxide is then charged slowly into the tank over a period of 5 to 6 hrsc) the whole tank content is kept for reaction for 15 to 20 hrs till all the acid is consumedd) the Ph of the reaction mass is adjusted to 7.5 to 8.0 using calcium hydroxidee) the reacted mass is then transferred to the settling tanks f) the settled reaction solution is then siphoned into a other collection tankg) the unreacted solid from the settling tank is again recycled to the reaction tankh) the clear reacted solution in the collection tank is then filtered through filter press for polishing the solutioni) the filtered calcium chloride solution is then send to the evaporation

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vessels where the water is evaporated and the solid calcium chloride recoveredit is dryed in the dryer .

j) the calcium chloride is then pulverized to the desired size and packed.

4) Polution abatement Unreacted solids are recycled so there is no solid waste productionThe reaction produces carbon dioxide which is scrubbed into lime / ammonia solutionSo gases are taken care ofThe product is non toxic

VENT air5) Process flow chart:- Ca(OH)2

Ca(OH)2/CaCO3 HCl water

CaCO3 slurry

unreacted solid recycle

Evapourated water

Calcium choride semifinished

Calcium chloride finished

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BRICK LINED

REACTOR TANK

SETTLING

TANK

FILTER

EVAPORATION

PANS

SCRUBBER

DRYINGPULVERIZING PACKING

Collection tank

MAERIAL BALANCE FOR THE PROCESS FOR THE MANUFACTURING OF CALCIUM CHLORIDE

222tonne/ month anhydrous.

1) Raw material requiredReaction stagea) Calcium carbonate or calcium hydroxide:- 200 tonne / 148.18 tonneb) Hydrochloric acid 30% :- 486.66 tonne

Evaporation stage:-a) Input for evaporation:- 598tonne/634tonneb) Output from evaporation:- 222 tonne/ 222 tonne calcium chloride

376 tonne/ 412 tonne water. Vapour.2) Energy required for the process

Energy is only consumed in evaporation is terms of fuel.Wood :- 61347.36kgs / 67221.05kgsFurnace oil:- 25902.22kgs/28382.22kgs

Ash produced by wood will be 3067.35 kgs / month used as a fertilizer in plantation.Flue gas will contain no sulphur dioxide and carbon monoxide.

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