Tungsten Oxide

Benzoic acid is a flake or needle like crystalline with a smell of benzene or formaldehyde, usually made by selective oxidation of toluene. Toluene is obtained by a series of oxidation processes. Benzoic acid is an important food preservative, and is also used in medicine, dye carriers, plasticizers, spices and antibacterial agents. In the traditional chemical process, the production of benzoic acid from toluene requires selective oxidation of toluene under severe conditions, such as high temperature, high pressure, and acidic solvents. Generally speaking, the process is costly and polluting. Tungstate is a kind of photocatalyst which is widely used in industrial wastewater treatment, but some scholars have made use of the principle of petal type bismuth tungstate photocatalyst to produce benzoic acid. Because bismuth tungstate can use oxygen as oxidant to catalyze the oxidation of toluene and its derivatives, thereby simplifying the preparation of benzoic acid and reduc...

The nitrogen oxides produced by coal combustion as a pollutant will affect human health. The most harmful is NO 2 , which mainly affects the respiratory system of human beings, and can cause bronchitis and emphysema. SCR selective catalytic reduction technology has become the most widely used and most effective flue gas denitrification technology in the world. It has the advantages of low reaction temperature, high purification rate, reliable operation and small two pollution. After its catalysis, the main non-toxic and non polluting N 2  and H 2 O are produced. In the SCR  soot denitrification technology  selective catalytic reduction system, it is generally composed of ammonia storage system, ammonia and air mixing system, ammonia injection system, reactor system and monitoring control system, the thermal power plant, SCR reactor is usually installed in the boiler economizer and air preheater, here for the high dust temperature arrangement, smoke temper...

Tungsten and carbon have many similar physical properties, such as high melting point, high hardness, and better conductivity and thermal conductivity. So foreign scientists first took aim at tungsten.  In recent years, foreign scholars through the study found that single layer tungsten disulfide also has excellent semiconductor performance, it not only has excellent characteristics of graphene, there are more excellent than the characteristics of the semiconductor, two tungsten sulfide has a considerable band gap, and it also shows new properties: As the number of atoms increases, the bandgap becomes tunable, and its electron migration rate is better than that of graphene, which is the ideal choice for transistor materials. There is no doubt that the emergence of graphene and other two-dimensional materials to the world's material industry brought about tremendous changes, as China attaches great importance to the material industry, graphene manufacturing technolo...

Tungstic acid is a tungsten heteropoly acid, with keggin structure, the appearance of white or pale yellow deliquescence crystals, soluble in water and alcohol. Butyrate but also known as butyl butyrate, can be used as bananas, pineapple and other fruit essence, used in beverages, cakes and bread food. Its traditional synthesis method is under the catalysis of sulfuric acid, esterification by butyric acid and butanol. However, the method has the disadvantages of long reaction cycle and low yield. Meanwhile, sulfuric acid has a strong corrosion on the equipment and produces wastewater that pollutes the environment. In recent years, in the food additives industry, tungsten silicate and tungsten phosphate have been widely used in place of traditional acid catalysis. They are both effective and environmentally friendly. They are the gospel of the whole food processing industry. The preparation of butyric acid vinegar is the synthesis of butyric acid vinegar by the catalysi...

Tungsten silicate is a kind of tungsten heteropoly acid with Keggin structure, recently it is widely used as food additives on catalytic synthesis. Its appearance is white or pale yellow deliquescent crystal.  Isopentyl cinnamate is a kind of perfume. It is a colorless viscous liquid with cocoa flavor. It is mainly used in food and daily chemical industry. It is a kind of spice which has a bright future to be developed. The traditional synthesis is catalyzed by sulfuric acid, cinnamic acid and isoamyl alcohol process acetification, the main drawback of this method is the existence of long reaction time, low yield, complex process polluted water on environment, sulfate has strong corrosive effect on equipment. Tungsten silicate is an environmentally friendly green catalyst, it has the structural characteristics of complexes and metal oxides, it has the acid catalysts function as inorganic acids (such as sulfuric acid) and solid acids (such as molecular sieves). In th...

Tungsten silicate is a tungsten heteropoly acid, its appearance is white or pale yellow deliquescent crystal, soluble in water and alcohol, soluble in crystal water itself. When heated, it has decomposition when under 600~650°C. Tungsten heteropoly acid is often used as a catalyst, so as tungsten silicate. Octyl acetate exist in citrus oil, green tea leaf oils and so on, it also exist in fruit. Octyl acetate is identified as non-toxic food by FEMA (the flavor and Extract Manufacturers Association). The preparation of octyl acetate can not be separated from the strong acid catalyst. Due to the oxidation and strong dehydration of concentrated sulfuric acid, the esterification rate is reduced, the quality of ester is poor, and the equipment is seriously corroded. A lot of waste liquid is produced in the post-treatment process, which pollutes the environment and so on. Tungsten heteropoly acid is a kind of green environmental friendly catalyst, in recent years, in the f...

Graphene, also called monatomic graphene, is a quasi two-dimensional material with only one atomic layer. Graphene is one of the newest, most powerful, conductive and thermal conductive materials. The "king of transistors" that is expected to replace silicon in the future. Since the first two-dimensional material graphene was discovered in experiments, two-dimensional electronic materials have been studied for more than 10 years. Two dimensional materials are the thickness of only one atom, also known as a single layer of material, they are several hundred times smaller than the thickness of a sheet of paper. Nano monolayer two tungsten sulfide is also a two-dimensional material, moreover, in the field of semiconductor transistors, single layer two tungsten disulfide has a functional advantage that graphene does not have. Transistors refer to all single elements based on semiconductor material. In a transistor, electrons pass from one end (S) to the other via a ...

China is a dominant country of tungsten resources and tungsten powder export, and export control conditions of 4xy3, has canceled export quota in 2016 and transferred to goods of export license administration. If you have any inquiry of  tungsten , please feel free to contact us: Email:  sales@chinatungsten.com / sales@xiamentungsten.com Tel.: +86 592 5129696/+86 592 5129595 Fax: +86 592 5129797 Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.