Ammonium metatungstate (AMT) is a white crystal powder or yellowish crystal powder with good water solubility, which can be used for preparation of diesel hydrogenation catalyst. For example, the researchers have proposed a method for preparing FCC diesel hydrorefining catalyst by using ammonium metatungstate as an active component.

Ammonium metatungstate (AMT) is a white or light yellow crystalline salt that is soluble in water. Generally, ammonium metatungstate solubility refers to the solubility of AMT in water. The data shows that at 20 °C, the solubility of AMT in water is 303.9g, and its solubility increases with increasing temperature. Besides, the aqueous solution of AMT is quite stable.

How to prepare ammonium metatungstate crystal? Or how to prepare AMT crystal? There are various preparation methods, such as thermal decomposition method, neutralization method, solvent extraction method, tungstic acid method, ion exchange method, etc.

How to prepare high purity ammonium metatungstate crystal? The researchers proposed a method for preparing high-purity AMT crystals - neutralization-nanofiltration coupling process. This method can not only obtain a high concentration AMT solution to reduce the cost for the subsequent crystallization process, but prepare AMT with less impurity content to ensure the preparation of high purity ammonium metatungstate.

What is ammonium metatungstate? Ammonium metatungstate, AMT for short, is a white or slightly yellow crystal powder that is soluble in water and insoluble in ethanol. AMT is an important intermediate compounds of tungsten hydrometallurgical process. Its chemical formula is (NH4) 6H2W12O40·XH2O, molecular formula is H8N2O4W, and molecular weight is 283.9145.

Tungsten alloy shield is a new type of lead-free shield with excellent shielding performance to X-rays so that it is mainly applied for mobile CT machine. Moreover, it is environmentally friendly and non-toxic, and will not affect the water, soil and air in the environment. It has been reported that mobile CT machine is used in mobile cabin hospitals because of its flexibility, efficiency and convenience, and patients can be examined nearby. A chest CT takes less than 3 minutes. The application of this highly sophisticated equipment has played an important role in satisfying first-line treatment.

Tungsten alloy radiation shielding door is a protective door made using tungsten alloy plate as a shielding part for applications in the CT room. Tungsten alloy radiation shielding door has a higher radiation shielding effect than the traditional lead door, and is environmentally friendly and non-toxic. Also, it will not pollute the environment, and can be recycled, so tungsten alloy door is the most popular lead-free radiation protection door.

Tungsten alloy sheet is necessary for radiation protection of CT room. What is the most important device in the CT room? CT scanner. While there are X-rays. And there is a risk of carcinogenesis. Therefore, there are radiations shielding parts in CT rooms and on CT scanners such as tungsten alloy plates and tungsten alloy tubes.

Tungsten alloy shield will be more and more popular in a medical CT room. You know, CT device is a common medical equipment that mainly uses X-rays for image diagnosis. For these X-rays, effective shielding protection is required to ensure the safety of professional operators and the patients and their family members. Therefore, each wall and protective door of the medical CT room are specially designed.

Tungsten alloy radiation protective door is a new type of radiation shielding door. Tungsten alloy door may be a manual side hung door, a manual sliding door, an electric sliding door, etc., which is mainly used in CT rooms, etc., to prevent the radiation of the CT device from leaking out, thereby protecting patients (receiving screening of novel coronavirus pneumonia) and their families, and medical personnel from hazard X ray radiation.