Tungsten oxide (WO₃), a yellow-green powder, is an important oxide of tungsten. At present, it is mainly used to manufacture W powder and WC powder, i.e. tungsten rod, tungsten wire and cemented carbide, which are the main terminal objects of tungsten oxide (WO₃).

Desulfurization process is a necessary process in petroleum refining, which mainly provides protection for subsequent catalysts, because sulfur element is very easy to cause subsequent cracking, catalytic reforming and other acidic catalysts poisoning and rapid deactivation. In addition, reducing the sulfur content in fuel is also conducive to reducing engine corrosion and wear, and improving the quality of petroleum products.

In the existing technology, the main used elements are thorium tungsten electrode (containing ThO₂), lanthanum tungsten electrode (containing La₂O₃), cerium tungsten electrode (CeO₂), zirconium tungsten electrode (ZrO₂), and other rare earth tungsten electrodes. All kinds of materials have their advantages and disadvantages. In addition to the shortcoming of radiation, the comprehensive welding properties of rare earth tungsten electrode materials for various units are not comparable to those of thorium tungsten electrode.

Methyl acetate is an important organic material widely used in the synthesis of acetic acid, acetic anhydride, methyl acetate, ethylene acetate and acetamide.