Catalyst for preparing oxygen from hydrogen peroxide, as well as preparation method and experiment method of catalyst

Abstract

The invention relates to a catalyst for preparing oxygen from hydrogen peroxide. The catalyst is prepared from the following components in parts by weight: 40-55 parts of agar, 20-40 parts of manganese dioxide, 100-120 parts of purified water, 4 parts of kaolin, 2 parts of silica gel, 1.5 parts of aramid fiber and 2 parts of stearic acid. Multiple experiments prove that the chemical reaction can be smoothly and lastingly carried out; the reaction rate is moderate; the effect is good; the requirements of demonstrative experiments and student experiments can be met completely; reacted liquid is still clear and transparent, and can be directly discharged after solids are filtered; and pollution is basically not generated.

Description

technical field [0001] The invention relates to a catalyst, especially a manganese dioxide catalyst used in the teaching experiment of preparing oxygen from hydrogen peroxide, as well as a preparation method of the catalyst and an experimental method using the catalyst. Background technique [0002] In the chemistry textbook, the laboratory preparation method of oxygen is introduced, and after discussing the selection principle of the laboratory preparation method and the comparison of various methods, an ideal common method is selected, and a demonstration experiment and a demonstration experiment are set up. Student group experiments. The experimental principle is: under the catalysis of manganese dioxide, hydrogen peroxide is decomposed. reaction equation [0003] 2H2O2====2H2O+O2↑ [0004] Because the product of this reaction is oxygen and water, there is no pollution, and it is indeed a relatively environmentally friendly and safe method. However, we found many disa...

AI Technical Summary

Problems solved by technology

[0005] 1. Manganese dioxide is a very fine black powder. After adding hydrogen peroxide solution, the reaction rate is very fast at the beginning, and the generated airflow is rushed out instantly. After a few minutes, the reaction almost stops, and the generated bubbles are uneven and discontinuous, which is not conducive to Oxygen collection and testing

[0006] 2. After the experiment, because it was difficult to recycle the catalyst—manganese dioxide, whose quality and chemical properties did not change before and after the reaction, the students all poured the dark liquid into the waste liquid tank. One grade After working in more than a dozen classes, dozens of shifts, the waste liquid was quite considerable. In the end, all the waste liquid was poured into the sewer, and a large amount of manganese dioxide, which could be reused, was wasted in this way. Great harm to the environment

[0007] In addition, there are still some small flaws in this experiment, such as: it is difficult to control the occurrence and stop of the reaction, and the added medicine will not stop until the reaction is complete; students often spill the powder when taking it, which is not easy to wipe clean, and the contamination test After the experiment of a class is completed, the container and the test bench are not easy to wash and wipe clean, which affects the appearance