Hydrogen sulphide and mercaptans scavenging compositions
AssigneeTotal Marketing Services
InventorsHemant Surendra Mondkar, Frédéric Tort
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Abstract
The present invention relates to a composition for scavenging hydrogen sulphide and/or mercaptans in hydrocarbon streams, the composition comprising an oxazolidine compound and a synergistic additive.
Claims16
A composition for scavenging hydrogen sulphide and mercaptans in hydrocarbon streams, said composition comprising an oxazolidine compound and an additive,
- the additive being the reaction product of a compound (A) with a compound (B), optionally followed by a quaternization reaction of the reaction product of (A) and (B) with a compound (C), wherein the weight ratio of oxazolidine compound(s) to said additive(s) ranges from 1 to 100,
- wherein:
- Compound (A) is a polyisobutenyl succinic anhydride (PIBSA),
- Compound (C) is a quaternizing agent, and
- Compound (B) is selected from:
- primary polyamines of formula (II):
- H2N—[(CHR3—(CH2)p—CHR4)q—NH]m—H
- wherein:
- R3 and R4, which are identical or different, represent hydrogen or an alkyl or alkenyl group comprising from 1 to 4 carbon atoms,
- q is an integer varying from 1 to 3,
- m is an integer varying from 1 to 10 and
- p is an integer equal to 0 or 1;
- or
- from the group consisting of:
- N,N-dimethylaminopropylamine, N,N,N-tris(aminoethyl)amine, N,N-dibutylaminopropylamine, N,N-diethylaminopropylamine, N,N-dimethylaminoethylamine, 1-(3-aminopropyl)imidazole, 4-(3-aminopropyl) morpholine, 1-(2-aminoethyl)piperidine, 3,3-diamino-N-methyldipropylamine, and 313-bisamino(N,N-dimethylpropylamine), and N′-(3-(dimethylamino)propyl)-N,N-dimethyl-1,3-propanediamine.
A composition for scavenging hydrogen sulphide and mercaptans in hydrocarbon streams, said composition comprising an oxazolidine compound and an additive,
- the additive being the reaction product of a compound (A) with a compound (B), followed by a quaternization reaction of the reaction product of (A) and (B) with a compound (C), wherein the weight ratio of oxazolidine compound(s) to said additive(s) ranges from 1 to 100, wherein:
- Compound (A) is a hydrocarbyl-substituted acylating agent,
- Compound (C) is a quaternizing agent,
- Compound (B) is an alkanolamine comprising one hydroxyl function, one primary amine function, and one tertiary function and from 4 to 16 carbon atoms.
A composition for scavenging hydrogen sulphide and mercaptans in hydrocarbon streams, said composition comprising an oxazolidine compound and an additive, the additive comprising:
- (i) a reaction product of a compound (A) with a compound (B), wherein:
- Compound (A) is a polyisobutenyl succinic anhydride (PIBSA),
- Compound (B) is a nitrogen-containing compound formula (II):
- H2N—[(CHR3—(CH2)p—CHR4)q—NH]m—H
- wherein:
- R3 and R4, which are identical or different, represent hydrogen or an alkyl or alkenyl group comprising from 1 to 4 carbon atoms,
- q is an integer varying from 1 to 3,
- m is an integer varying from 1 to 10 and
- p is an integer equal to 0 or 1,
- or
- (ii) a reaction product of a compound (A) with a compound (B), followed by a quaternization reaction of the reaction product of (A) and (B) with a compound (C), wherein:
- Compound (A) is a polyisobutenyl succinic anhydride (PIBSA),
- Compound (B) is an alkanolamine comprising one hydroxyl function, one primary amine function and one tertiary amine function and from 4 to 16 carbon atoms,
- Compound (C) is a quaternizing agent,
- wherein the composition comprises from 19 to 99% wt of oxazolidine compound(s) and from 1 to 50% wt of said additive(s), based on the total weight of the composition, and wherein the oxazolidine compound is selected from bisoxazolidines having a structure of formula (I):
- wherein
- n is an integer ranging from 1 to 6;
- and
- R1 and R2, identical or different, are selected from a hydrogen atom and a linear, branched or cyclic alkyl or alkenyl groups having from 1 to 6 carbon atoms.
Dependencies are inferred from the claim text.