In the 16th century, Lipafius officially recorded the preparation method of hydrogen chloride: mixing concentrated sulfuric acid with table salt and heating [3]. Later, chemists such as Graub, Priestley, and David also used hydrochloric acid in their research [4].
During the Industrial Revolution, mass production of hydrochloric acid began. In the chemical industry, hydrochloric acid has many important applications, which play a decisive role in the quality of products. Hydrochloric acid can be used to pickle steel [5] and is also a chemical reagent required for the large-scale preparation of many inorganic and organic compounds [6-7], such as vinyl chloride, the precursor of PVC plastics. Hydrochloric acid also has many small-scale uses, such as household cleaning, production of gelatin and other food additives, scale removal reagents, and leather processing. The world produces about 20 million tons of hydrochloric acid every year.
