Butanone, also known as 2-butanone, is an organic compound with the chemical formula C4H8O and has a special fragrance. It is a colorless and transparent liquid, highly volatile and flammable at room temperature. Butanone is widely used as a solvent, an intermediate in chemical reactions and a raw material for the synthesis of other organic compounds. Additionally, MEK is used in the manufacture of various chemicals and industrial products such as plastics, rubber, footwear, paints, and cleaning agents.
Detection performance
For methyl ethyl ketone, an organic compound, the following performance parameters can be detected, which are very important for the production and use of methyl ethyl ketone. The following is a simple table listing:
| performance parameter | Test Methods |
|---|---|
| Relative density | Measure the density of methyl ethyl ketone at a certain temperature and divide by the density of water |
| Refractive index | Measuring how much light is refracted when passing through butanone |
| melting point and boiling point | Measuring the Melting and Boiling Points of Butanone |
| water content | Measuring Water Content in MEK Using the Karl Fischer Method |
| acid value | Measuring the Acidity of Butanone Using Acid-Base Titration |
| Solubility | Test the solubility of methyl ethyl ketone to various solvents at different temperatures |
| Contains impurities | Detection of impurities in methyl ethyl ketone using chromatography or other methods |
| stability | Testing the stability and degradation performance of methyl ethyl ketone under different environmental conditions |
Detection method
The following is a detailed description of the detection methods for the various performance parameters of methyl ethyl ketone mentioned above:
Relative density: put the butanone sample in a pycnometer of known weight, measure the total mass of the butanone and water mixed liquid in the pycnometer, and then measure the mass of water filled in the pycnometer, the relative density can be calculated by the total mass and The mass of water is calculated.
Refractive index: drop the methyl ethyl ketone sample into a solution of known refractive index, use a refractometer to measure the degree of light refraction in the methyl ethyl ketone sample, and then calculate the refractive index of methyl ethyl ketone.
Melting point and boiling point: Using a melting point apparatus or boiling point apparatus, measure the melting point and boiling point of butanone at standard atmospheric pressure.
Water content: use the Karl Fischer method to convert the water in butanone into carbon dioxide and water through catalytic reaction, and then use an electronic balance to measure the mass of the reacted carbon dioxide to calculate the water content in butanone.
Acid value: use the acid-base titration method, drop the butanone sample into the alkali solution of known concentration until the neutral point appears in the solution, record the required titration, and then calculate the acid value of butanone.
Solubility: Mix and stir the methyl ethyl ketone sample and various solvents to observe whether the methyl ethyl ketone can dissolve in the solvent, so as to evaluate the solubility of methyl ethyl ketone.
Containing impurities: Using chromatography, inject butanone samples into the chromatographic column, and determine the type and content of impurities in the sample by detecting the time for different components in butanone to pass through the chromatographic column.
Stability: Expose butanone samples to different environmental conditions, such as high temperature, high humidity, sunlight exposure, etc., to observe whether the butanone changes, and perform corresponding chemical analysis to evaluate the stability and degradation performance of butanone.
Beichao reminds you: Different performance parameters may require different testing equipment and methods, and some tests may require professional laboratories or professional technicians to complete.
