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Preparation method of tungsten oxide

U.S. refiners forecast strong first-quarter earnings as margins on gasoline and diesel sales improved, refining capacity fell sharply and crude supplies tightened due to the Russia-Ukraine war.

Global refining capacity has declined amid the coronavirus pandemic, with several less profitable refineries closing in the past two years. However, global fuel demand has rebounded to near pre-pandemic levels, boosting the profits of facilities still operating.  

Seven U.S. independent refiners are expected to earn 61 cents a share, compared with a loss of $1.32 in the first quarter of 2021, according to Refinitiv's IBES.  

By 2022, gasoline and distillate tungsten oxide, tungsten oxide overview, tungsten oxide application, tungsten oxide supplier, tungsten oxide price.

Tungsten oxide overview

Tungsten trioxide is a powder metallurgy raw material for the production of cemented carbide and tungsten products. According to the national standard (GB/T 3457-1998), it is divided into two types, namely tungsten trioxide (referred to as yellow tungsten), molecular formula is WO3, and blue tungsten oxide (referred to as blue tungsten, is a mixed tungsten oxide), molecular formula W20O58. Yellow tungsten is light yellow crystalline powder, blue tungsten is dark blue or blue-black crystalline powder.

Preparation method of tungsten oxide

1. Ammonium tungstate method: The tungsten concentrate is hydrolyzed by sodium hydroxide, neutralized with hydrochloric acid, and then reacted with ammonium chloride to generate ammonium tungstate, which is then added with hydrochloric acid for acid hydrolysis to generate tungstic acid, which is then decomposed by roasting. , pulverized to obtain tungsten trioxide.

2. Hydrochloric acid decomposition method of tungstate. The saturated aqueous solution of sodium tungstate Na2WO4, calcium tungstate CaWO4 and other tungstate salts is heated, and the solution is slowly added dropwise into 2-3 times excess boiling concentrated hydrochloric acid by molar ratio. According to the above reaction, yellow tungstic acid is precipitated. At this time, if the dripping speed is too fast or the liquid temperature drops, suspension or colloidal precipitation is likely to be formed, which brings difficulties to the next treatment. After the dropwise addition, heating was continued on a water bath for 1 h, and the precipitate became easy to filter. After standing, it was washed several times with 5% ammonium nitrate aqueous solution to completely remove Cl-. After filtration, it is dried at 120 °C, and finally heated to 600 °C, the tungstic acid is completely dehydrated and becomes tungsten trioxide.

3. Thermal decomposition of ammonium paratungstate. Put ammonium paratungstate (NH4) 10W12O41·11H2O purified by recrystallization method into a porcelain crucible, and when heated to above about 400 ℃, ammonia volatilizes to obtain tungsten trioxide.

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Application of tungsten oxide WO3 powder

Tungsten oxide has a variety of uses in daily life. It is commonly used in the manufacture of phosphors for industrial X-ray screens and tungstates for fire-resistant fabrics. Due to its rich yellow element, tungsten oxide is also used as a pigment in ceramics and paints. In addition, other application examples of tungsten trioxide are as follows:

Tungsten oxide is mainly used in the production of tungsten powder and tungsten carbide powder by calcination reduction, and is further used in the production of cemented carbide products, such as the manufacture of tools and molds.

Tungsten oxide can also be used to manufacture pure tungsten products, tungsten rods, tungsten wires, tungsten electrodes; and use counterweights and radiation shielding materials.

In industrial production, a small amount is also used as a colorant for yellow ceramics. In the shipbuilding industry, tungsten oxide is used as an important anti-corrosion paint and coating material.

Tungsten oxide has been used to produce electrochromic windows, smart windows. These windows are electrically switchable glass that varies in light transmittance and applied voltage. This allows users to tint their windows by changing the heat or light.

Tungsten oxide WO3 powder price

The price of tungsten trioxide powder will change randomly with the production cost of tungsten trioxide powder, transportation cost, international situation, exchange rate, market supply and demand and other factors. Tanki New Materials Co.,Ltd aims to help various industries and chemical wholesalers find high-quality, inexpensive nanomaterials and chemicals by providing turnkey custom manufacturing services. If you are looking for tungsten oxide WO3 powder, please feel free to send an inquiry to get the latest price of tungsten oxide WO3 powder.

Tungsten Oxide WO3 Powder Supplier

As a global tungsten oxide WO3 powder supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics, structural devices, and can provide OEM services.

More information about Tungsten Oxide WO3 Powder

Tungsten Trioxide Properties (Theoretical)

Compound Formula

WO3

Molecular Weight

231.85

Appearance

Yellow Powder

Melting Point

1473 °C (2683 °F)

Boiling Point

1700 °C ( 3092 °F)

Density

7.16 g/cm3

Solubility in H2O

Insoluble

Crystal Phase / Structure

Monoclinic

Exact Mass

231.936 g/mol

Monoisotopic Mass

231.935644 Da

Charge

-6


The Turkish Foreign Ministry said in a recent statement that on the same day, the Turkish Foreign Ministry spoke on the phone with the Secretary-General of the United Nations to discuss the latest progress of the agreement on grain shipments from Ukraine.

According to a report by Turkey's Anadoru News Agency on the same day, the Turkish Defense Minister said that three grain ships will set sail from the Ukrainian port on the 5th local time.

On the 3rd, local time, the first grain ship from the Ukrainian port of Odessa passed the inspection of the Joint Coordination Center in Istanbul, Turkey, and continued to sail to its destination, the port of Tripoli, Lebanon.


Japan's Asahi Shimbun recently reported that oil giants in Europe and the United States have made a lot of money thanks to high oil prices without a substantial increase in OPEC +.

The report pointed out that large oil companies have achieved good results. BP's second-quarter 2022 results showed that its net profit was about three times that of the same period last year, to $9.3 billion.

Shell's second-quarter net profit was $18 billion, 5.3 times that of the same period a year earlier. ExxonMobil, the US oil giant, posted a net profit of $17.8 billion in the second quarter, 3.8 times that of the same period a year earlier. Chevron's second-quarter net profit was $11.6 billion, 3.8 times that of the same period a year earlier.


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