Acidic substances have a wide range of applications in chemical, dye, food processing, building materials, and environmental protection fields.
In the chemical industry, sulfuric acid and hydrochloric acid are common inorganic strong acids that can be used to produce various organic chemicals and plastics. At the same time, they can also be used for the production of metal surface treatment agents and other purposes; 2. As a printing and dyeing auxiliary agent, acidic Yanyan Jing, which has the characteristics of rust removal, fiber expansion, increased luster, bright color, firm dyeing, and resistance to chlorine bleaching, belongs to this category; 3 .  Used as an anti-corrosion agent and to neutralize excessive stomach acid, it also has a certain effect, and its effect on cleaning sewers is very significant: 4. In the construction industry, it can be used as a concrete hardening agent, which can quickly enhance strength and prevent water pollution. In addition, it is widely used for water purification in wastewater treatment processes. In recent years, with the increasing emphasis on health, the demand for phosphate free washing machines has also gradually increased, leading to a decrease in the amount of phosphate added. It is also worth noting that the low cost of producing oxygen-containing acids has indirectly led to the production of certain alkaline wastewater, which puts pressure on environmental protection and needs to be properly addressed. The above are some basic knowledge sharing about the "acid" industry! Hope it's helpful to you~(Data for reference only)