Also known as: kerosene merox, lpg merox
The merox unit is a proprietary UOP technology that selectively sweetens petroleum products by oxidizing the foul-smelling mercaptans into the sweeter disulfides which remain in the product, leaving the total sulfur content the same. The process is sometimes known as a sweetening process and is much cheaper to install than a hydrotreater, which actually lowers the sulfur content.
Merox is primarily used to sweeten mercaptans from jet fuel or from LPG.
In the merox process, the mercaptan is oxidized by means of a proprietary UOP catalyst, in an alkaline environment.
The merox process is preferred for jet fuel sweetening over hydrotreating, because it is less expensive and jet fuel's high sulfur limit (3,000 ppm) does not require the removal of the other sulfur compounds that hydrotreating provides.