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 china petroleum), atmosphere, drinking water, salt, limestone, sulfur or an equivalent, and some specialized raw materials for special products, such as phosphates and the mineral fluorspar.
The chemical industry comprises the firms that produce 
industrial chemicals. Central to the modern world economy, it converts raw materials (oil, natural gas, air, drinking water, metals, and minerals) into a lot more than 70,000 different items.