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D
Drizo
Drizo A variation of the glycol process for removing water vapor from natural gas, in which the water
is removed from the glycol by stripping with a hydrocarbon solvent, typically a mixture of pentanes and
heavier aliphatic hydrocarbons. The process also removes aromatic hydrocarbons. The last traces of water are
removed from the triethylene glycol by stripping with toluene in a separate, closed loop. Invented in 1966 by
J.C. Arnold, R.L. Pearce, and H.G. Scholten at the Dow Chemical Company. More than 45 units were operat-
ing in 2000. The latest version, operated in Hungary, also uses a desiccant bed.
U.S. Patent 3,349,544.
Hydrocarbon ...