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Supercritical fluid technology has emerged since the 1970s.
Since then, it has easily surpassed traditional technology with its significant advantages in environmental protection, high efficiency, low energy consumption, and economy, and quickly penetrated into extraction separation, petrochemical industry, chemical reaction engineering, materials science, Many fields such as biotechnology and environmental engineering have become one of the leading developments in these fields
.
For example, at present, incineration, activated carbon adsorption, wet air oxidation, photochemical oxidation, photocatalytic oxidation, electrochemical oxidation and other methods are mainly used for the treatment of waste water and waste from the production of explosives.
In recent years, as people’s understanding of super (near) critical water has gradually deepened, super (near) critical water has the characteristics of non-toxic and non-combustible.
As an environmentally friendly solvent and reaction medium, super (near) critical water The study of water as a medium for chemical reactions has aroused people's great interest
.
The extraction and recovery of useful chemical substances through the hydrolysis of organic substances in ultra (near) critical water has attracted the attention of some scholars