Scavenger compositions for sulfur species
AssigneeInnophos, Inc.
InventorsJean Valery Martin, Giovanni Onnembo, Evelyn Olanipekun, Kevin Kempton, Arbnor Ibraimi, William Carton
Life of this patent
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Abstract
A scavenger composition comprising a carrier and an active metal, wherein the carrier is present in an amount of about 1.0 wt % to about 99.0 wt. %, based on total weight of the composition, and the active metal is present in an amount of about 1.0 wt % to about 99.0 wt. %, based on total weight of the composition, wherein the active metal is a metal salt or metal chelate, and wherein the metal is chosen from iron, copper, molybdenum and zinc.
Claims12
A scavenger composition for reducing hydrogen sulfide emissions from asphalt comprising:
- a carrier in an amount of about 1.0 wt % to about 99.0 wt. %, based on total weight of the composition, and
- an active metal in an amount of about 99.0 wt % to about 1.0 wt. %, based on total weight of the composition,
- a dispersant in an amount of about 0.01 wt % to about 10.0 wt. %, based on total weight of the composition, and
- a suspension aid in an amount of about 0.01 wt % to about 10.0 wt. %, based on total weight of the composition, wherein the suspension add is chosen from polysaccharides, fumed silica, modified bentonite, hectorites, castor oil derivatives, polyamides, polyolefins, and polyacrylates,
- wherein the active metal is a metal salt or metal chelate, and wherein the metal is chosen from iron, copper, molybdenum, nickel and zinc.
A process for preparing a scavenger composition comprising:
- adding to a carrier an active metal in a ratio of from about 1.0:4.0 to about 4.0:1.0 carrier to active metal,
- further comprising adding to the carrier a suspension aid in an amount of about 0.01 wt % to about 10.0 wt % and a dispersant in an amount of about 0.01 wt % to about 10.0 wt %, based on total weight of the composition, wherein the suspension add is chosen from polysaccharides, fumed silica, modified bentonite, hectorites, castor oil derivatives, polyamides, polyolefins, and polyacrylates,
- wherein the suspension aid and dispersant are able to provide a stable suspension of the active metal in the carrier, and
- wherein the scavenger composition is able to reduce hydrogen sulfide emissions.
Dependencies are inferred from the claim text.