H/sub 2/S removal process and composition

Patent · Tue Aug 22 04:00:00 EDT 1989

OSTI ID:5425891

Olson, D C; Miller, J J

The patent describes a process for the removal of H/sub 2/S from an H/sub 2/S-containing gaseous stream. It comprises: contacting the H/sub 2/S-containing gaseous stream with aqueous reactant solution in a contacting zone, at a temperature below the melting point of sulfur. The reactant solution containing ammonium ferric nitrilotriacetate chelate and ammonium ferrous nitrilotriacetate chelate. The ratio of the ammonium ferric nitrilotriacetate chelate to ammonium ferrous nitrilotriacetate chelate in the reactant solution being from about 0.2 to about 6, at least about 0.1 percent, molar basis, with respect to the ammonium ferric and ammonium ferrous nitrilotriacetate chelates, of aqueous ammonia, a total iron content of from about 0.5 percent to about 7 percent by weight, based on the weight of the solution and iron, and a total concentration of sodium and potassium ions present in the reactant solution less than that sufficient to precipitate sodium and potassium ferrous nitrilotriacetate chelate, and having a pH of from about 5 to about 8.5, under conditions to convert H/sub 2/S producing a gaseous stream having reduced H/sub 2/S content and an aqueous admixture containing solid sulfur and additional ammonium ferrous nitrilotriacetate chelate in solution.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4859436
• Application Number: PPN: US 7-075195A
• OSTI ID: 5425891
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACETATES
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
CARBOXYLIC ACID SALTS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
DESULFURIZATION
DISPERSIONS
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
MIXTURES
PROCESS SOLUTIONS
REMOVAL
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS