The boundaries of the chemical industry, then, are somewhat confused. Its main raw materials are the fossil fuels (coal, Air Compressor For Production Of Chemical Raw Materials china natural gas, and petroleum), air, water, salt, limestone, sulfur or an equivalent, and some specialized recycleables for 
special products, such as for example phosphates and the mineral fluorspar.
The chemical industry comprises the firms that produce commercial chemicals. Central to today’s world economy, it converts raw materials (oil, gas, air, drinking water, metals, and nutrients) into more than 70,000 different products.