The boundaries of the chemical industry, then, are somewhat confused. Its primary raw materials will be the fossil fuels (coal, natural gas, and Air Compressor For Production Of Chemical Raw Materials petroleum), atmosphere, drinking water, salt, limestone, sulfur or an equivalent, plus 
some specialized recycleables for special products, such as phosphates and the mineral fluorspar.
The chemical industry comprises the companies that produce industrial chemicals. Central to the modern world economic climate, it converts raw materials (oil, natural gas, air, drinking water, metals, and minerals) into more than 70,000 different products.