Heteropolyacid with Keggin structure is one of the most active catalysts used in acid-catalyzed reactions and redox reactions. For the hydration and esterification of olefins, the etherification of epoxides, the condensation reaction of olefins and aldehydes, the alkylation of olefins and the epoxidation of olefins and alkylaromatics have good catalytic performance. 

Tungsten disulfide is newly developed material which can reduce friction and save power, its property is better than graphite and molybdenum disulfide. The friction coefficient is 0.03, dry friction property is better than any other material, can be used under high temperature and pressure.

Phosphotungstic acid (H3PW12O40·nH2O) has wide application in heteropolyacids, it is also the most typical catalyst. For the hydration and esterification of olefins, the etherification of epoxides, the condensation reaction of olefins and aldehydes, the alkylation of olefins and the epoxidation of olefins and alkylaromatics have good catalytic performance.

Tungsten is important strategic metal resource, ammonium paratungstate is significant tungsten chemical products. There is strict requirement for ammonium paratungstate purity. Impurity content requirement for APT-0 is potassium, sodium and sulfide content respectively lower than 0.001%, 0.001%, 0.0008%. 

Wolf Minerals Ltd (ASX: WLF)(LON: WLFE) has released a quarterly update on operations at its Drakelands tungsten mine in Devon, England.

Institutional Ownership

In TUNG’s case, institutional ownership stands at 63.12%, significant enough to cause considerable price moves in the case of large institutional transactions, especially when there is a low level of public shares available on the market to trade. 

Yellow tungsten oxide (YTO) is also named as tungsten trioxide, chemical formula is WO3, mainly used to reduce as tungsten powder or tungsten carbide powder which are raw materials of tungsten alloy and tungsten carbide products, such as producing of cutting tools and dies, also for producing tungsten metal products such as tungsten bar, tungsten wire and tungsten electrode.

Bro Brosdahl was a happy man. He’d been ice fishing the mid-November night before, near his northern Minnesota home. "We've had unusually cold weather," the guide and Northland Tackle representative said of the early start of his hard-water season.

Tungsten oxide is an important intermediary product in tungsten industry. Tungsten powder’s grain size is affected by tungsten oxide. Blue tungsten oxide is important raw material for producing tungsten products, it has take place of yellow tungsten oxide gradually after years’ practice. 

Tungsten Corp (TUNG) shares are moving today on volatility 33.33% or $0.0002 from the open. The OTC listed company saw a recent bid of $0.0008 and 102500 shares have traded hands in the session.