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It is readily liquefied by moderate pressure (6 atmospheres) at ordinary temperatures (70°F.). When liquid, it has a specific gravity of 1.46 and, when a gas, it is 2.5 times heavier than air, so that when released »is a cloud it clings well to the ground as it travels downwind. One liter of liquid chlorine at 25°C. will yield 434 liters of chlorine gas. Since

Soda ash aoluKon

Soda ash aoluKon

Hydrochloric acid (hcl)

Settling tank

Acidifying tantc

Direct electric Current

Sludge

ConsH>n+ ftow of pure scttt so/oHon 6

Direct electric Current

Salt&cauttîc NaCOCNaOH) in solution

Wet chlorine gas *KH20)

Tpcon-

cen bcfior

Salt&cauttîc NaCOCNaOH) in solution

Drying towers (counter current dryfng)

cen bcfior

* 76

Dry chlorine Y

s+orage

ConsH>n+ ftow of pure scttt so/oHon 6

Wet chlorine gas *KH20)

Drying towers (counter current dryfng)

Was+e water(H20) Chakt IX.—Electrolytic manufacturo of rhlorino (ftoi

Sulphuric acid diluted with water

Was+e water(H20) Chakt IX.—Electrolytic manufacturo of rhlorino (ftoi

chlorine )>oils at -33.6°C. (-28.5°F.), it readily vaporizes at ordinary temperatures and escapes with vigor from its container, so that it is well adapted for cloud-gas operations from cylinders, and this was its principal mode of employment during the war.

Chlorine is manufactured by the electrolysis of common salt (NaCl), as indicated on Chart IX, and is widely used in enormous quantities in industry. In the presence of moisture it is extraordinarily reactive.

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