Alkanolamine gas treating process for a feedstream containing hydrogen sulfide

Patent · Tue Aug 16 04:00:00 EDT 1988

OSTI ID:6748420

Kubek, D J; McCullough, J G; Barr, K J; Kosseim, A J

This patent describes an improved alkanolamine acid gas treating process for removing acid gas from a feedstream in which hydrogen sulfide is present comprising the steps of contacting the feedstream with an aqueous alkanolamine solution in an absorption column to form an alkanolamine solution rich in acid gas containing hydrogen sulfide, regenerating an alkanolamine solution lean in acid gas from the rich solution for recycling through the absorption column and introducing a vanadium compound into the alkanolamine solution for inhibiting corrosion. The improvement consists of: (a) maintaining a minimum solution concentration of H/sub 2/S within a range of between about 0.003 to 0.02% by weight in the lean alkanolamine solution; and (b) introducing a source of oxygen into the lean alkanolamine solution in a sufficient amount to maintain a minimum solution concentration within a range of between about 30 to 70 PPM vanadium in its plus five valence state throughout the acid gas treating operation.

• Assignee: Union Carbide Corp., Danbury, CT
• Patent Number(s): US 4764354
• OSTI ID: 6748420
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
ADSORPTION
AMINES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
CORROSION INHIBITORS
CORROSION PROTECTION
DESULFURIZATION
DISPERSIONS
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MIXTURES
ORGANIC COMPOUNDS
REMOVAL
SOLUTIONS
SORPTION
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS