Method for rapidly measuring content of silicon in catalyst

Abstract

The invention relates to a method for rapidly measuring the content of silicon in a catalyst. The method comprises the following steps: rapidly dissolving a catalyst sample and a high-purity silicon dioxide standard substance in an alkali solution at high temperature, adding an ethanol-acetone mixed solution serving as a stabilizer under an acidic condition, and then adding ammonium molybdate for color reaction so as to generate yellow silicon molybdenum yellow heteropolyacid; and performing reduction on silicon molybdenum yellow heteropolyacid to obtain silicon molybdenum blue heteropolyacid, making up to the constant volume, measuring the absorbancy at the wavelength of 810nm, and calculating the content of silicon in the sample according to a standard curve of silicon dioxide concentration and absorbancy value. Compared with a conventional silicon dioxide alkali fusion method, the method has the advantages that the sample treatment temperature is low, the treatment speed is high, and silicon in the catalyst is simply measured by a spectrophotometric method.

Description

technical field [0001] The invention relates to the technical field of catalyst chemical analysis and testing, in particular to a rapid determination method for silicon content in catalysts. Background technique [0002] The analysis and testing of silica content is mainly divided into two types: chemical analysis and instrument analysis. The instrument analysis speed is fast, but it is difficult to dissolve the sample, and the error and interference are large, so that the instrument can directly and accurately measure the silica content. It is very difficult. At present, the analysis of silica content mainly adopts chemical analysis methods, including gravimetric method, volumetric method and colorimetric method. The gravimetric method mostly dissolves the sample with hydrofluoric acid or alkali and then converts it into a silicic acid precipitate, which is burned at a high temperature to make it into SiO 2 Determination of content after weighing, many operation steps, no...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of measuring the silicon content in the catalyst with reference to the silicon content determination methods of samples such as cement, ceramics, metal alloys and water bodies in the above-mentioned prior art, the difference in the nature of the samples may cause large measurement deviations and reduce the accuracy of the results. The invention provides a rapid determination method of silicon content in catalysts, so as to overcome the deficiencies in existing silicon content determination methods and realize accurate determination of silicon content in catalysts

Images