Effect of isopropanol on air rectification

We all know that argon is contained in the air. Its boiling point is between nitrogen and oxygen. Therefore, in order to obtain relatively pure nitrogen and oxygen at the same time when separating air, certain measures must be taken for small high and medium pressure air separation units. Measures can be taken to extract the fraction from the tower. So let's take a closer look at the effect of isopropanol on air rectification.

Air rectification can generally be divided into single-stage rectification and double and rectification. Isopropanol It is not mixed with nitrogen or mixed with oxygen. It is impossible to produce pure nitrogen and pure oxygen at the same time. The single-stage rectification operation is convenient, but the obtained product has poor purity and high energy consumption. Therefore, double and rectification are generally used at present. For large and medium-sized low-pressure air separation units, the measures of extracting less oxygen-containing impure nitrogen gas at the top of the upper tower are generally referred to as sewage nitrogen, so that most of the argon brought in by the air is taken out of the distillation tower with this impure nitrogen gas. .

Through the above knowledge, we know that air rectification can be divided into single-stage rectification and double and rectification, and we can use the measures of extracting less oxygen-containing impure nitrogen at the top of the upper tower to reduce the nitrogen. Most of the argon introduced is carried out of the rectification column with this impure nitrogen. This is the method we have adopted.