Monthly Archives - November 2022

Determination of vanadium content in vanadium carbide

Vanadium carbide is an important alloy additive, which can improve the corrosion resistance, wear resistance, strength and other comprehensive properties of hard alloys, so it is widely used in alloys. At present, the main methods for the determination of high vanadium content are REDOX titration, inductively coupled plasma atomic Emission spectrometry (ICP-AES), X-ray fluorescence spectrometry and spectrophotometry, but they all have their shortcomings. Chemical titration is widely used because of its high accuracy, easy to master and low operating [...]

Preparation and application of lanthanum manganate

Composite oxides are widely used as catalysts in modern chemical industry because of their excellent oxidation/reduction properties, high mechanical strength and good thermal stability. Among them, perovskite compound oxide is particularly eye-catching. Since the 1950s, perovskite-type composite oxides have been used in catalytic combustion, photocatalysis, fuel cells and metals Air cell, environmental catalysis, catalytic hydrogenation, catalytic cracking and so on have been widely used and studied. At present, there are many methods used to synthesize perovskite, such as coprecipitation method, [...]

Ruthenium trichloride was prepared from ruthenium containing waste

Preparation of Ruthenium trichloride directly from ruthenium-containing waste material Ruthenium trichloride is one of the most important compounds of ruthenium and is an important chemical raw material in the fields of heterogeneous catalysis, homogeneous catalysis, electroplating, coating and so on. A method of preparing ruthenium trichloride directly from ruthenium waste material was introduced. The process is simple, the cost is low, the operation is simple, and the direct yield of ruthenium is more than 90%. Ruthenium waste generally comes from [...]

Method for preparing subnickel oxide from nickel precipitate

The invention relates to a method for preparing subni oxide by reusing nickel precipitate. Firstly, the unqualified products produced by solution precipitation are screened to obtain a part of nickel precipitate with diameter > 5.0μm and a part of nickel precipitate with diameter ≤5.0μm. Then sediment diameter of 5.0 microns or less nickel and nickel salt solution to join the spray pyrolysis device, spray reaction, resulting atomized droplet during spray contains nickel deposits, in the pyrolysis reaction, nickel salt [...]