Basic methods of laboratory and industrial preparation of oxygen
Dec 10, 2022
Oxygen is prepared in the laboratory, because the required amount is small, so we can use potassium permanganate to prepare it. So, what is the specific method of operation in this way? What are the differences from industrial preparation in the preparation process? Let's find out below.
The laboratory prepares oxygen to heat potassium permanganate, the chemical formula is: 2KMnO4===(△) K2MnO4+MnO2+O2↑, and the catalyst MnO2 is used to heat potassium chlorate, the chemical formula is: 2KClO3===(△,MnO2) 2KCl+3O2↑ , Hydrogen peroxide (hydrogen peroxide) generates O2 and H2O in the catalyst MnO2 (or red brick powder, potatoes, cement, rust, etc.), and the chemical formula is: 2H2O2===(MnO2) 2H2O+O2↑
Industrial production of oxygen methods: 1. Compressed cooling air. 2. Molecular sieve: The method of producing oxygen in nuclear submarines: 2Na2O2+2CO2===2Na2CO3+O2 The advantages of this method: 1. It is carried out at room temperature. 2. Make oxygen and carbon dioxide form a cycle (people consume oxygen and exhale carbon dioxide, and this reaction consumes carbon dioxide to generate oxygen). The production of oxygen can also use sodium peroxide (Na2O2 reacts with water to generate sodium hydroxide and oxygen. In addition, the Potassium chlorate is heated to generate potassium chloride and oxygen, sulfur trioxide can also be decomposed to generate oxygen, and hypochlorous acid can also generate oxygen and chlorine under the catalysis of heating and manganese dioxide, as well as electrolyzed water. 3. Physical oxygen production through oxygen enrichment Oxygen is produced by the membrane, and the air is oscillated. According to the different activity speeds of nitrogen and oxygen, a sufficient concentration of oxygen is extracted through the oxygen-enriched membrane. Note: The oxygen content of 30% is the best concentration for the body, called oxygen-enriched state.
