1. Chemical raw materials
Chemical raw materials are raw materials used in chemistry and industry to produce chemical products. There are millions of chemical products in the world, and more than 100,000 types are sold and circulated in the market, and there are more than 1,000 kinds each year. New chemicals appear, although hundreds of them are considered carcinogens. The chemical product can be an independent entity, or a variety of chemical products can be combined to form a new chemical product.
2. Classification of chemical raw materials
(1) Chemical raw materials are divided into two categories: organic chemical raw materials and inorganic chemical raw materials according to their material sources.
Organic chemical raw materials Organic chemical products can be divided into alkanes, alkenes, alkynes, quinones, aldehydes, alcohols, ketones, phenols, ethers, anhydrides, esters, organic acids, carboxylates, carbohydrates, heterocyclics, Nitriles, halogenated, amide and other organic chemical raw materials.
Inorganic chemical raw materials The main raw materials of inorganic chemical products are chemical minerals such as sulfur, sodium, phosphorus, potassium, calcium, coal, petroleum, natural gas, air, water, etc. For example: coke oven gas in the coking production process in the iron and steel industry, the ammonia contained in it can be recycled with sulfuric acid to produce ammonium sulfate, and the sulfur dioxide in the smelting waste gas of chalcopyrite, galena and sphalerite can be used to produce sulfuric acid.
(2) According to the production process, it can be divided into starting materials, basic materials and intermediate materials.
Starting materials Starting materials are the raw materials needed for the first step of chemical production, such as air, water, coal, petroleum, natural gas, sea salt, various minerals, agricultural products, starch-containing food, etc.
Basic raw materials The basic material is obtained by processing the starting material.
Intermediate raw materials Intermediate raw materials are also called intermediates. For example, in complex organic chemical production, products produced from basic raw materials, but not the final application product, require further processing. For example, various organic compounds for the production of dyes, plastics and pharmaceuticals: methanol, acetone, vinyl chloride, etc.
3. Introduction to the chemical industry
The chemical industry is the general term for enterprises and units engaged in the production and development of the chemical industry. The chemical industry penetrates all aspects and is an indispensable and important part of the national economy. Its development is to take the road of sustainable development and has important practical significance for human economic and social development. The chemical industry occupies an important position in the national economy of each country, and is the basic industry and pillar industry of many countries. The development of the chemical industry has a direct impact on the entire society. The annual output value of chemical products in the world has exceeded US$1.5 trillion. The chemical industry is a major polluter due to its diverse categories, complex processes, and diverse products, as well as many types, large quantities, and high toxicity of pollutants emitted during production. At the same time, chemical products may produce large amounts of toxic substances in various links such as processing, storage, use and waste disposal, which affect the ecological environment and endanger human health. The sustainable development of the chemical industry has important practical significance for human economic and social development.
4. Summary
The chemical industry is not only a pillar industry of the country, but also a pillar industry of the world. We are eager and yearning to make chemicals bigger and stronger!
