Oxygen preparation method

In industry, the method of distilling air is generally used to produce oxygen, which is referred to as distillation for short (using the different boiling points of various components in the air to separate different components by heating to different temperatures). The specific operation steps are as follows:

1. First liquefy the air, and then heat the liquefied gas with a heating device.

2. Using the different boiling points of N2 and O2 to separate oxygen and nitrogen, crude oxygen can be obtained.

There are three ways to make oxygen in the laboratory: drugs: potassium chlorate and manganese dioxide (manganese dioxide is the catalyst). Reaction conditions: heating reaction principle: 2kclo3 = mno2△ = 2kcl+3o2. Method 2: Potassium permanganate reaction conditions: heating reaction principle: 2kmno4 =△ = k2mno4+MnO2+ O 2. Methods Three drugs: hydrogen peroxide and manganese dioxide (manganese dioxide is the catalyst) reaction conditions: reaction principle at room temperature:: 2H2O2 = Mn O2 = 2H2O+O 2.