Physical properties of chlorine gas Chlorine gas is soluble in water, in organic solvents and insoluble in saturated brine. The chemical formula of chlorine is Cl, which is a yellow-green gas at normal temperature and pressure and has a strong pungent smell. The density of chlorine gas is 2.5 times that of air.
The aqueous solution of chlorine is called chlorine water, and the saturated chlorine water is yellow-green, with a pungent smell. The main particles contained are Cl2, H2O, HClO, H+, Cl- and ClO-.
Tap water is disinfected with chlorine water, so the following solutions are prepared with tap water, such as KI, KBr, FeCl2 _ 2, Na2SO3, Na2CO3, NahCO _ 3, AgNO3 _ 3, NaOH, etc. , will go bad.
Application of chlorine in chemical industry
1, used to produce inorganic chemical products such as sodium hypochlorite, aluminum trichloride, ferric trichloride, bleaching powder, bromine and phosphorus trichloride;
2. Used for producing organic chlorides, such as chloroacetic acid, epichlorohydrin, monochlorobenzene, etc.
3. Used for producing neoprene, plastics and plasticizers;
4. In the daily chemical industry, sodium alkyl sulfonate and sodium alkyl benzene sulfonate are used to produce synthetic detergent raw materials.
In the electronics industry
High-purity chlorine gas is mainly used in dry etching, optical fiber, crystal growth and thermal oxidation in electronic industry.
Used for sewage treatment of brewery. China patent discloses the method of treating beer wastewater with chlorine. Chlorine is widely used in water supply companies because of its low price, low dosage, reliable disinfection and mature technology. Chlorine can also deodorize and remove microorganisms, and the removal rate of biological oxygen consumption and chemical oxygen consumption is also high, which can ensure the stability of recycled water quality, so it is more suitable for brewery sewage treatment.
Disinfection of tap water tap water is usually disinfected with chlorine gas, and about 0.002g chlorine gas is introduced into 1L water. The principle of disinfection is to react with water to produce hypochlorous acid, which has strong oxidation performance to kill bacteria in water.