With the improvement of the high purity tungsten production technology, the research and development of tungsten chemical have been promoted. There are about 45% of the researches related to tungsten compound in metathesis catalysis. These tungsten catalysts are attractive because they are easy to generate double or triple bond compounds with carbon that these compound catalyst is easier to system control than the olefin and acetylene.

 

Most heteropolyacid tungsten compounds can be used as acid and redox catalyst, and ammonium metatungstate catalyst is a new type of catalyst with more excellent performance. During the process of methanol transferring to hydrocarbon, it shows high catalytic performance and unique selectivity. Ammonium metatungstate has been widely used in petroleum, electronics, defense, aerospace, metallurgy, corrosion, fire, etc. , which aroused great public attention and now it became a new catalyst material with growing volume and uses.

 

Catalyst production is also being developed into a professional sector. When using the metals and metal oxides as the catalyst, mostly add catalyst material into the carrier to increase the effective areas and the mechanical strength, which is adapted to the shape of the reactor. Common carriers in the industry are silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, zirconia, activated carbon and so on. These vectors contain impurities and moisture, mostly use acid treatment and calcination methods for activation. Ammonium metatungstate catalyst has three main features: strong activity, high selectivity, and long service life. The supported catalyst containing the active component (ammonium metatungstate catalyst), mainly prepared by dipping method.