Inorganic chemical industry

Inorganic chemical industry is the abbreviation of inorganic chemical industry. It is an important branch of chemical industry. It uses natural resources and industrial by-products as raw materials to produce inorganic acids, soda ash, caustic soda, synthetic ammonia, chemical fertilizers and inorganic salts such as sulfuric acid, nitric acid, hydrochloric acid and phosphoric acid. The industry of chemical products. Including sulfuric acid industry, soda ash industry, chlor-alkali industry, synthetic ammonia industry, fertilizer industry and inorganic salt industry. The production of inorganic non-metallic materials and fine inorganic chemicals such as ceramics, inorganic pigments and the like is also broadly included. The main raw materials of inorganic chemical products are chemical minerals such as sulfur, sodium, phosphorus, potassium and calcium, as well as coal, oil, natural gas, air and water. Inorganic chemicals can be traced back to thousands of years of ancient processes such as ceramics, alchemy, brewing, and dyeing. Although its scale is small and its technology is backward, it is all manual operation, but it is a prototype of inorganic chemicals. For thousands of years, its development has been slow due to low productivity. It was not until the 18th century that there was a rapid development. In the mid-18th century, the UK used the lead chamber method to produce sulfuric acid from sulfur and saltpeter. In 1783, the Frenchman Lubran proposed the alkali method of using sodium chloride, sulfuric acid and coal as raw materials. In the second half of the 18th century, the modern chemical industry with inorganic chemicals as the main content began to form. Phosphate production began in 1841. In 1965, the Belgian Solvay realized the industrialization of alkali-based alkali production; in 1870, the potassium industry rose; 1890 In the year of 1999, Cl2 and caustic soda were prepared by electrolysis; in 1913, the catalytic synthesis of ammonia with N2 and H2 as raw materials was realized. In 1942, Hou Debang, a Chinese expert in alkali production, successfully studied the Hou's alkali method. After the 1950s, the inorganic chemical industry flourished, and a wide variety of inorganic chemical products emerged in an endless stream, and the inorganic chemical processes continued to improve and mature. The main research contents of inorganic chemical industry: 1 basic inorganic chemical processes including acid, alkali, salt, ammonia and chemical fertilizer; 2 electrolytic production including caustic soda, chlorine, hydrogen and oxygen, metal wet electro-metallurgical production, calcium carbide, Electrochemical production process including electrothermal production of calcium cyanamide and phosphorus; 3 industrial production process of silicate including glass, ceramics, cement, etc.; 4 fineness including production of reagents, chemicals and rare elements Inorganic chemical process.