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The Adip process is regenerative amine process for the removal of hydrogen sulfide and carbon dioxide from natural gas, refinery gas, and synthesis gas. The process uses aqueous solutions of the secondary amine, diisopropanolamine, or the tertiary amine, methyl di-ethanolamine. Amine concentrations up to 50% w/w can be applied. Hydrogen sulfide can be reduced to low sulfur levels. The process can also be applied to remove hydrogen sulfide, carbon dioxide, and carbonyl sulfide (COS) from liquefied petroleum gas or natural gas liquid to low levels.

The Adip-X process is a regenerative amine process that is highly suitable for bulk and deep removal of carbon dioxide from gas streams. The process uses aqueous solutions of the tertiary amine, methyl diethanolamine, and an additive.

See also: Gas Cleaning, Gas Processing, Gas Treating.