Patent ID: 11952546
Assignee: TOTAL MARKETING SERVICES
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. 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.