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Tungsten alloy X-ray shielding collimator refers to a tungsten alloy collimator having excellent X-ray shielding performance, which is better than a lead collimator. Tungsten alloy is well-known as a non-lead shielding material, a non-toxic shielding material and an environmentally shielding material. While lead is a toxic shielding material. So, nowadays lead collimators are mostly replaced by tungsten alloy collimators. More details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html Tungsten alloy X-ray shielding collimator, as a beam limiting device, is used in the head of…

WO3 composite coating is a good choice for formaldehyde degradation. It is the photocatalytic performance of tungsten trioxide that make WO3 composite coating have the performance of degrading formaldehyde, thereby improving air quality and human health. More details, please visit: http://tungsten-oxide.com/index.html Preparation of WO3 Composite Coating for Formaldehyde Degradation Step One: Weigh a certain amount of H2WO4, and calcine the weighed H2WO4 at different temperatures for 5-8 h to prepare a WO3 visible light photocatalyst. Step Two: The prepared WO3…

Ammonium metatungstate is used as the active component in the preparation of honeycomb ceramic catalyst. And the prepared high specific surface area porous honeycomb ceramic catalyst is particularly suitable for soot purification in thermal power plants, glass plants, chemical plants and other fields. More details, please visit: http://www.ammonium-metatungstate.com/index.html A Method for Preparing High Specific Surface Area Porous Honeycomb Ceramic Catalyst Using titanium dioxide, montmorillonite and α alumina as the carrier, ammonium metatungstate, ammonium metavanadate, cerium nitrate and palladium acetate as…

The researchers proposed a new two step ion exchange method for the preparation of high purity ammonium paratungstate. This method overcomes the shortcomings of low tungsten adsorption capacity, low concentration of crude sodium tungstate feed liquid, and large dilution of feed liquid in the ion exchange process using strong basic anion exchange resin, while maintaining certain advantages. More details, please visit: http://ammonium-paratungstate.com/index.html Preparation of High Purity Ammonium Paratungstate by Two Step Ion Exchange Use porous strong basic anion exchange resin…

Thermal decomposition process of APT is the thermal decomposition process of ammonium paratungstate. The researchers have proposed a detailed and systematic decomposition mechanism of ammonium paratungstate under inert gas on the basis of summarizing previous research results. More details, please visit: http://ammonium-paratungstate.com/index.html Thermal decomposition process of APT mainly includes the following four steps: Step One: At 50-180 °C, lose all crystal water to form anhydrous ammonium paratungstate; Step Two: At 190-280 °C, lose NH3 to form an amorphous compound; There…

Preparation of ammonium paratungstate by two step ion exchange method is a process of preparing high-purity APT by twice ion exchanges. More details, please visit: http://ammonium-paratungstate.com/index.html Preparation of High-purity Ammonium Paratungstate by Two Step Ion Exchange Method Step One: Absorb tungsten by porous strongly basic anion exchange resin from alkaline solution, and then acidify the pH value of solution to 2.5-4 by desorption solution; Step Two. Absorb tungsten by using acrylic type weakly basic anion exchange resin, and then desorb…

The solvent extraction method is one of many methods of preparing ammonium paratungstate. The conversion rate of this method is high. And the mother liquor can be incorporated into the feed liquid for recycling. Also, the back extraction liquid can be used repeatedly. And it can even be used as agricultural fertilizer after reaching a certain ammonium concentration. More details, please visit: http://ammonium-paratungstate.com/index.html Preparation of Ammonium Paratungstate by Solvent Extraction Method Step One: Dissolve sodium tungstate solid in a small…

Ion exchange method is used to prepare ammonium paratungstate. That is because this method has advantages of a short process flow, simple equipment and high tungsten recovery rate. Also, it can simultaneously complete the two tasks of impurity removal and transformation. In addition, it can significantly increase the concentration of tungsten trioxide in the pre-delivery solution and reduce the generation of wastewater. More details, please visit: http://ammonium-paratungstate.com/index.html Preparation of ammonium paratungstate by ion exchange method Step One: Tungsten concentrate is…

It is a new process to obtain tungsten trioxide by microwave heating ammonium paratungstate. The process requires a short calcination time (only 4min, while the traditional method takes about 2h), and the prepared yellow WO3 powder product is of good quality so that it is worth applying in industry. More details, please visit: http://ammonium-paratungstate.com/index.html Preparation of Tungsten Trioxide by Microwave Heating Ammonium Paratungstate Weigh 10g of dried ammonium paratungstate (WO3: 88.5% mass fraction) into the crucible, and record the weight…

The researchers proposed a method for preparing tungsten trioxide by using wet ammonium paratungstate as raw material. More details, please visit: http://ammonium-paratungstate.com/index.html Preparation of Tungsten Trioxide by Using Wet Ammonium Paratungstate Add 240 kg of wet APT with water content ≤8% to the silo every hour, and send the wet APT into the rotary furnace evenly through the double screw feeder. At 710 °C, the wet APT is decomposed by heating for 40 min to obtain WO3, NH3 and water…