There are many kinds chemical raw materials, the use is very wide. Chemicals in the world has 500 ~ 7 million, the sale in the market circulation of more than 100000 kinds, and every year there are more than 1000 kinds of new chemicals, and there are 150 ~ 200 is considered to be carcinogenic.
Chemical raw materials in general can be divided into two types: organic chemical raw materials and inorganic chemical raw materials
Organic chemical raw materials
Can be divided into alkanes and its derivatives, olefins and their derivatives, alkynes and derivatives, quinones, aldehydes, alcohols, ketones, phenols, ethers, anhydride, esters, organic acids, carboxylic acid salts and carbohydrates, heterocyclic, nitriles, halogen, amino acid and other kinds
Inorganic chemical raw materials
Inorganic chemical products is the main raw material, sodium, sulfur, phosphorus, potassium, calcium and other mineral (see inorganic salt industry) and coal chemical, oil, natural gas and air, water, etc. In addition, many industrial sectors of by-products and waste, and inorganic chemical raw materials, such as: iron and steel industry in the coking process of coke oven gas, which contains ammonia available made from recycled ammonium sulfate and chalcopyrite, galena, sphalerite smelting sulfur dioxide can be used to produce sulfuric acid in waste gas, etc.
No comments:
Post a Comment