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