After refining hydrogen chloride gas due to a small amount of impurity (especially organic matter), so it is widely used, the following simple description of its use.

● Production of hydrochloric acid

The refined HCl gas (in packed or membrane absorber) can be absorbed with water to produce industrial-grade hydrochloric acid, which is the method adopted by most enterprises. The hydrochloric acid can be used in metal cleaning, oil well acidification, hydrometallurgy (such as dealing with clay, kaolin or carbonaceous shale producing alumina, instead of sulfuric acid processing titanium iron ore production of titanium dioxide, such as noble metal chloride hydrometallurgy production), instead of sulfuric acid to react with sodium chlorate production of chlorine dioxide, phosphate acid phosphate fertilizer production, the manufacture of inorganic matter (such as

HCL gas cylinders

The nanpo Coal Mine Bureau of Liaoning Province uses hydrochloric acid to treat coal gangue to produce crystalline aluminum chloride and polyaluminum chloride water treatment agent. The crystalline aluminum chloride and polyaluminum chloride are respectively 10,000 t/a, 50,000 T/A consumed by industrial hydrochloric acid, and organic synthesis (such as aromatic acid esterification). In addition, the hydrochloric acid produced can be heated, desorbed, condensed, filtered and adsorbed to obtain high yield and high purity hydrogen chloride, making it more widely used.

● High purity HCl gas production

High purity HCl gas can be produced by absorption - desorption - condensation - filtration - adsorption process. The uses of this high purity hydrogen chloride gas are as follows:

The process of preparing HCL

● PVC production

High purity HCl gas can be used to synthesize chloroethylene with ethylene, and can also be used to produce chlorinated hydrocarbon by catalytic oxychlorination reaction with hydrocarbon, air (or oxygen). The most important oxychlorination reaction in industry is the production of dichloroethane. The resulting dichloroethane is cracked to make vinyl chloride and produces HCl gas as a by-product, which can be recycled.

How useful hcl gas is （II）