RECYCLING SATURATED ALKANOLAMINES AND REDUCING THEIR ENVIRONMENTAL IMPACT
Keywords:
Gas purification, operational and physicochemical properties deteriorateAbstract
The use of gases as raw materials in the chemical industry requires purification from various toxic compounds. 25-30% aqueous solutions of diethanolamine or methyldiethanolamines are used to purify natural gases from toxic compounds. As a result of repeated use of these solutions in the gas purification process and repeated regeneration at high temperatures, its operational and physicochemical properties deteriorate, the amines are polymerized and become unsuitable for gas purification.
When we analyzed the amines used in gas purification, we found the following: A solution of ethanolamines absorbs toxic compounds well, but it also absorbs oxygen well. Oxygen absorbed in solution as a result of regeneration of the absorbent at high temperatures oxidizes ethanolamine and leads to its polymerization.
References
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