Composition and method for scavenging sulfides and mercaptans

Patent metadata

Field	Value
Publication number	US-2018100096-A1
Application number	US-201615573783-A
Country	US
Kind code	A1
Filing date	Mar 21, 2016
Priority date	May 14, 2015
Publication date	Apr 12, 2018
Grant date	—

Abstract

This invention relates to a composition comprising 1.) a metal carboxylate, wherein the metal M is selected from the group consisting of Ag, Cn, Hg, Pb, Sn, Ni, Co, Ca, Fe, Zn and Mn, those metals being present as ions in a +2 or +3 charge state, and wherein the carboxylate anion is derived from a hydrocarbyl monocarboxylic acid having 5 to 20 carbon atoms, or a mixture of such acids, 2.) a solvent selected from the group consisting of water, glycol ethers having from 4 to 15 carbon atoms, alkyl alcohols having from 1 to 10 carbons, and aromatic hydrocarbon solvents having from 6 to 30 carbons, and 3.) an emulsion breaker which is a polymeric nonionic surfactant.

First claim

1 . A composition comprising
a metal carboxylate, wherein the metal M is selected from the group consisting of Ag, Hg, Pb, Sn, Ni, Co, Ca, Fe, Zn and Mn, those metals being present as ions in a +2 or +3 charge state, and wherein the carboxylate anion is derived from a hydrocarbyl monocarboxylic acid having 5 to 20 carbon atoms, or a mixture of such acids, a solvent selected from the group consisting of water, glycol ethers having from 4 to 15 carbon atoms, alkyl alcohols having from 1 to 10 carbons, and aromatic hydrocarbon solvents having from 6 to 30 carbons, and an emulsion breaker which is selected from the group consisting of a polymeric nonionic surfactant and dodecylbenzene sulfonic acid.

2 . The composition according to claim 1 , wherein the metal carboxylate corresponds to formula (1)
M a+ (R—CO 2 ) b (OH) c-b   (1)
wherein M is selected from the group consisting of silver, mercury, lead, tin, nickel, cobalt, cadmium, iron and manganese, a is 2 or 3, b is 1, 2 or 3, c is (a-b), and R is a hydrocarbyl radical containing from 4 to 19 carbon atoms, or mixtures of such carboxylates.

3 . The composition according to claim 1 , wherein the metal carboxylate is zinc carboxylate.

4 . The composition according to claim 3 , wherein the zinc carboxylate corresponds to formula Zn 4 (O 2 CR) 6 O, wherein R is a hydrocarbyl radical containing from 4 to 19 carbon atoms, or mixtures of such carboxylates.

5 . The composition according to claim 1 , wherein the metal carboxylate is oil-soluble.

6 . The composition according to claim 1 , wherein the acids R—COOH, from which the metal carboxylate is derived, are liquid below 100° C.

7 . The composition according to claim 1 , wherein M is Fe.

8 . The composition according to claim 1 , wherein the metal carboxylate of formula (1) is the salt of a neoacid of the formula (2)

wherein
R 1 , R 2 , and R 3 are each independently alkyl groups containing 1 to 16 carbon atoms, with the total number of carbon atoms contained in R 1 , R 2 , and R 3 being from 3 to 18.

9 . The composition according to claim 1 , wherein the metal carboxylate of formula (1) is a salt of an isoacid of formula (3)
R 4 —CH 2 —COOH   (3)
wherein R 4 is an aliphatic, branched hydrocarbyl group containing from 2 to 20 carbon atoms.

10 . The composition according to claim 1 , wherein the metal carboxylate of formula (1) is a salt of a guerbet acid of formula (4)

wherein
R 5 is a hydrocarbyl group containing from 2 to 8 carbon atoms, and
R 6 is a hydrocarbyl group containing from 4 to 10 carbon atoms.

11 . The composition according to claim 1 , wherein the solvent is selected from the group consisting of isopropyl alcohol, methanol, ethanol, propanol, butanol. ethylene glycol, propylene glycol, butylene glycol, oligoethylene glycols, oligopropylene glycols, isopropyl alcohol, toluene, xylene, naphthalene, ethylbenzene, trimethylbenzene, and aromatic naphtha (AN).

12 . The composition according to claim 1 , wherein the emulsion breaker is a compound of formula (5)

wherein
R 7 is C 2 to C 4 alkylene
R 8 is C 1 to C 18 alkyl
k is a number from 1 to 200 and
m is a number from 1 to 100.

13 . The composition according to claim 1 , wherein the emulsion breaker is dodecylbenzene sulfonic acid.

14 . The composition according to claim 1 , further comprising an additional H 2 S scavenger, wherein the additional H 2 S scavenger is a compound selected from the group consisting of triazines according to formula (7)

wherein
each R 9 is independently selected from the group consisting of C 1 to C 20 straight or branched alkyl groups, or —R 10 OH, where R 10 is a C 1 to C 20 straight or branched alkylene group;
hemi-acetal compounds of the general formula R 11 R 12 C(OH)OR 13 wherein R 11 , R 12 or R 13 are hydrogen and/or C 1 to C 20 straight or branched alkyl group;
hydroxyalkylhydantoins, bis(hydroxyalkyl)hydantoins, and dialkylhydantoins, wherein the alkyl group is a C 1 to C 6 alkyl group; and
glyoxal.

15 . The composition according to claim 1 , further comprising a scale inhibitor selected from the group consisting of 1-hydroxyethane-1,1-diphosphonate, diethylenetriamine penta(m ethylene phosphonic acid), nitrilo(m ethylene phosphonic acid), methacrylic diphosphonate homopolymer, polymaleates, polyacrylates, polymethacrylates, polyphosphates, phosphate esters, acrylic acid-allyl ethanolamine diphosphonate copolymer, sodium vinyl sulfonate-acrylic acid-allyl ammonia diphosphonate terpolymer, acrylic acid-maleic acid-diethylene triamine) allyl phosphonate terpolymer and polycarboxylates.

16 . The composition according to claim 1 , further comprising a scale inhibitor copolymer, wherein the scale inhibitor copolymer comprises
a) 0.1 to 10 mol-% of structural units derived from vinylphosphonic acid and/or of a salt thereof, b) 40 to 90 mol-%, of structural units derived from compounds of the formula (12)

and
c) 1 to 50 mol-% of structural units derived from compounds of the formula (13)

in which
X is OH or NR 14 R 15 , and R 14 and R 15 , independently of one another, are H or C 1 -C 4 -alkyl.

17 . The composition according to claim 1 , comprising
0.1 to 80 wt.-% of the metal carboxylate, 1 to 50 wt.-% of the solvent, and 0.1 to 10 wt.-% of at least one emulsion breaker.

18 . The composition according to claim 11 , comprising the additional H 2 S scavenger in an amount of 1 to 20 wt.-%.

19 . The composition according to claim 15 , comprising the scale inhibitor in an amount of 0.1 to 5 wt.-%.

20 . (canceled)

21 . A process for scavenging sulfhydryl molecules in oilfield operations and process systems, the process comprising adding to a system susceptible to production of sulfhydryl compounds the composition according to claim 1 .

Assignees

• Clariant Int Ltd

Inventors

• WYLDE Jonathan James

Classifications

• C09K8/532 Primary

  Sulfur · CPC title

• C07F3/06

  Zinc compounds · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title

• C07C15/113

  having at least two saturated side-chains, each containing at least six carbon atoms · CPC title

• C07D255/02 Primary

  not condensed with other rings · CPC title