# US 2014/0190870 A1 · Synergistic h2s scavenger combination of transition metal salts with water-soluble aldehydes and aldehyde precursors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190870 A1 - Document ID: US20140190870A1 - Status: Published application - Kind: A1 - Application number: 14/149,008 - Filed: 2014-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Baker Hughes Incorporated - Applicants: Baker Hughes Incorporated - Inventors: SCOTT E. LEHRER; Vladimir Jovancicevic; Sunder Ramachandran - Web page: https://patentgrep.com/patent/US20140190870A1 ## CPC - C10G 29/06: Metal salts, or metal salts deposited on a carrier - C10G 29/24: Aldehydes or ketones - C10G 2300/202: Heteroatoms content, i.e. S, N, O, P - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES ## Abstract The use of a composition including a transition metal salt and at least one water-soluble aldehyde or water-soluble aldehyde precursor scavenges H2S that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over the case where each component is used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of a water-soluble aldehyde or water-soluble aldehyde precursor is ethylene glycol hemiformal. ## Claims ### Claim 1 A method for scavenging hydrogen sulfide and/or mercaptans from a fluid selected from the group consisting of an aqueous phase, a gaseous phase, a hydrocarbon phase and mixtures thereof, the method comprising contacting the fluid with a composition in an effective amount for synergistically scavenging hydrogen sulfide and/or mercaptans, where the composition comprises: at least one transition metal salt, and at least one water-soluble aldehyde or water-soluble aldehyde precursor; where synergistically scavenging is defined as the amount of hydrogen sulfide and/or mercaptans scavenged is greater as compared with a composition where either the transition metal salt or the at least one water-soluble aldehyde or water-soluble aldehyde precursor is absent, used in the same total amount. ### Claim 2 (depends on 1) The method of claim 1 where: the transition metal salt is selected from the group consisting of zinc chloride, zinc octoate, zinc acetate, zinc oleate, a zinc salt containing at least one hydrocarbyl group of at least 4 carbon atoms, zinc di-(neo-alkyl)-phosphorodithioate, zinc 2-ethylhexyl isopropyl phosphorodithioate, zinc dihydrocarbyldithiophosphates (ZDDP), zinc hydrocarbyl phosphate, zinc ethyl hexanoate, zinc naphthenates, copper salts, cobalt salts, manganese salts, iron chloride, iron carboxylates, iron neocarboxylates, iron naphthenates, ferrocene, molybdenum metal salts, zinc carboxylates, zinc carboxylate polymers and combinations thereof; and the at least one water-soluble aldehyde or water-soluble aldehyde precursor is selected from the group consisting of ethylene glycol hemiformal, glutaraldehyde, 2 [hydroxyethanol (amino)]ethanol, propylene glycol hemiformal, and combinations thereof. ### Claim 3 (depends on 1) The method of claim 1 where the composition comprises from about 0.05 wt % to about 50 wt % metal salt, where the balance is the at least one water-soluble aldehyde or water-soluble aldehyde precursor, without accounting for any solvent. ### Claim 4 (depends on 1) The method of claim 1 where the effective amount of the composition present in the fluid is from about 10 to about 10,000 ppm. ### Claim 5 (depends on 1) The method of claim 1 where the method is practiced in upstream production. ### Claim 6 (depends on 1) The method of claim 1 where the method is practiced in a refinery. ### Claim 7 A composition for scavenging hydrogen sulfide and/or mercaptans from a fluid, the composition comprising: at least one transition metal salt; and at least one water-soluble aldehyde or water-soluble aldehyde precursor. ### Claim 8 (depends on 7) The composition of claim 7 where: the metal salt is selected from the group consisting of zinc chloride, zinc octoate, zinc acetate, zinc oleate, a zinc salt containing at least one hydrocarbyl group of at least 4 carbon atoms, zinc di-(neo-alkyl)-phosphorodithioate, zinc 2-ethylhexyl isopropyl phosphorodithioate, zinc dihydrocarbyldithiophosphates (ZDDP), zinc hydrocarbyl phosphate, zinc ethyl hexanoate, zinc naphthenates, copper salts, cobalt salts, manganese salts, iron chloride, iron carboxylates, iron neocarboxylates, iron naphthenates, ferrocene, molybdenum metal salts, zinc carboxylates, zinc carboxylate polymers and combinations thereof; and the at least one water-soluble aldehyde or water-soluble aldehyde precursor is selected from the group consisting of ethylene glycol hemiformal, glutaraldehyde, 2 [hydroxyethanol (amino)]ethanol, propylene glycol hemiformal, and combinations thereof. ### Claim 9 (depends on 7) The composition of claim 7 where the composition comprises from about 0.05 wt % to about 50 wt % metal salt, where the balance is the at least one water-soluble aldehyde or water-soluble aldehyde precursor, without accounting for any solvent. ### Claim 10 A fluid treated to scavenge hydrogen sulfide and/or mercaptans therefrom, comprising: a fluid selected from the group consisting of an aqueous phase, a gaseous phase, a hydrocarbon phase and mixtures thereof, a composition present in an effective amount for synergistically scavenging hydrogen sulfide and/or mercaptans from the fluid, where the composition comprises: at least one transition metal salt, and at least one water-soluble aldehyde or water-soluble aldehyde precursor; where synergistically scavenging is defined as the amount of hydrogen sulfide and/or mercaptans scavenged is greater as compared with a composition where either the transition metal salt or the at least one water-soluble aldehyde or water-soluble aldehyde precursor is absent, used in the same total amount. ### Claim 11 (depends on 10) The fluid of claim 10 where: the transition metal salt is selected from the group consisting of zinc chloride, zinc octoate, zinc acetate, zinc oleate, a zinc salt containing at least one hydrocarbyl group of at least 4 carbon atoms, zinc di-(neo-alkyl)-phosphorodithioate, zinc 2-ethylhexyl isopropyl phosphorodithioate, zinc dihydrocarbyldithiophosphates (ZDDP), zinc hydrocarbyl phosphate, zinc ethyl hexanoate, zinc naphthenates, copper salts, cobalt salts, manganese salts, iron chloride, iron carboxylates, iron neocarboxylates, iron naphthenates, ferrocene, molybdenum metal salts, zinc carboxylates, zinc carboxylate polymers and combinations thereof; and the at least one water-soluble aldehyde or water-soluble aldehyde precursor is selected from the group consisting of ethylene glycol hemiformal, glutaraldehyde, 2 [hydroxyethanol (amino)]ethanol, propylene glycol hemiformal, and combinations thereof. ### Claim 12 (depends on 10) The fluid of claim 10 where the composition comprises from about 0.05 wt % to about 50 wt % metal salt, where the balance is the at least one water-soluble aldehyde or water-soluble aldehyde precursor, without accounting for any solvent. ### Claim 13 (depends on 10) The fluid of claim 10 where the effective amount of the composition present in the fluid is from about 10 to about 10,000 ppm.