Bismuth tungstate Bi₂WO₆ is a new photocatalyst material. Because of its non-toxicity, low cost, high stability, easy preparation and good visible light response, Bi₂WO₆ has broad application prospects in light, electrochromic materials, photoelectrochemical hydrogen production, photocatalytic degradation of organic compounds and solar cells.

Ultrafine cemented carbide has the advantages of high hardness, high strength and good toughness. It is called "double-high" cemented carbide, and is widely used in high-efficiency precision tools, micro-drills, micro-milling, blades, precision molds and so on.

Zinc tungstate (ZnWO₄) with wolframite structure is an important inorganic material. Because of its excellent chemical stability, high refractive index, high X-ray absorption coefficient, high quantum yield and good photoelectric activity, it is used in X^-, gamma-ray scintillators, photoluminescence, microwave systems, solid-state lasers, gas and humidity sensors, photocatalysis, acoustooptic fibers and magnetism. Materials and other fields have a wide range of applications.

Electrochromic phenomena refer to the reversible change of material color under external electric field. In recent years, more and more attention has been paid to electrochromic materials because of their great application prospects in stealth materials, smart chromic films and other fields.

Promoted by the vigorous development of petroleum processing industry, especially in the petroleum cracking and organic synthesis industries, the research and development of tungsten catalysts have received widespread attention. Ammonium metatungstate, as the most important precursor of tungsten-containing catalysts and tungsten metal, has the advantages of high water solubility and non-toxicity, so it is widely used as a tungsten source.

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).

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.

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.

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

All-vanadium redox battery is a kind of redox battery which uses vanadium as active material and circulates in liquid state. Both positive and negative active substances are vanadium sulfuric acid solution. Electrode reaction occurs in liquid phase, which greatly reduces the electrochemical polarization. Its rated power and rated power can be designed separately. By changing the electrolyte, instantaneous charging can be achieved, and 100% deep discharge will not damage the battery. Based on the above advantages, it can be widely used in photovoltaic power generation, wind power generation, smart grid, peak valley power, distributed power stations, communication base stations, UPS/EPS, transportation and military fields.