Visual type harmful gas remover and preparing method
A technology for harmful gases and removers, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation. Capture, easy-to-manipulate effects
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example 1
[0016] Dissolve 4g KMnO 4 , 0.5g NaHCO 3 In 100ml of water, weigh 100 grams of silica gel and soak it in it, vacuum dry it after 30 minutes, and turn it into red granules or lumps after 4 hours, package it in a container with a hole in the wall, or place it in a container with good air permeability The material such as (but not limited to) non-woven fabric, fiber cloth is made in the pocket, and the outside is sealed with airtight material such as tinfoil. After unsealing, the carrier obtained above is placed in a room or cabinet with formaldehyde. After a certain period of time, the carrier turns from red to brown, indicating that the carrier is saturated with formaldehyde gas.
example 2
[0018] Dissolve 4g KMnO 4 In 0.1M NaOH solution, weigh 100 g of silica gel and soak it, dry it in vacuum after 30 minutes, and take it out after 4 hours. The carrier obtained above is placed in a car with formaldehyde. After a certain period of time, if the carrier changes from red to brown, it means that the carrier has absorbed formaldehyde gas and reached saturation.
example 3
[0020] Dissolve 4g KMnO 4 In 0.1M NaOH solution, weigh 200 grams of molecular sieves and soak them, vacuum dry them after 30 minutes, and take them out after 4 hours. Above-mentioned gained carrier is placed on 1000cm 3 In an environment with a formaldehyde content of 1000ppm, after 5 days, most of the carrier changed from red to brown, and the formaldehyde content in the environment was detected again to be 0ppm.
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