Suppression of the evolution of hydrogen sulfide gases from crude oil, petroleum residua and fuels
AssigneePetrolite Corporation
InventorJerry J. Weers
Life of this patent
Estimating the term…
Abstract
Hydrogen sulfide gas evolution during storage or transport of petroleum residua is suppressed by the incorporation of an effective amount of certain imines.
Claims47
A process for treating a crude oil or petroleum residuum medium containing hydrogen sulfide to prevent liberation of the hydrogen sulfide from the medium during storage and transport, comprising adding to said medium an effective amount of a non-acidic imine compound which is the condensation product of an amine or polyamine and an aldehyde, dialdehyde or ketone thereby to inhibit liberation of the hydrogen sulfide from the medium during storage and transport.
A composition comprising a crude or petroleum residuum medium and a non-acidic imine compound which is the condensation product of an amine or polyamine and an aldehyde, dialdehyde or ketone in an amount sufficient to inhibition hydrogen sulfide evolution from the residua.
A composition comprising petroleum residua containing hydrogen sulfide and a sufficient amount of the following imine additive to inhibit evolution of the hydrogen sulfide as a gas from the residua:
- R.sub.1 (N.dbd.R.sub.2).sub.x
- wherein x in an integer of 1 to about 10;
- R.sub.1 is independently selected from the group consisting of ##STR31## cycloalkyl having about 4 to about 7 carbon atoms;
- phenyl, benzyl;
- ##STR32## and alkyl having 1 to about 20 carbon atoms or alkenyl having 1 to about 20 carbon atoms;
- wherein R.sub.3 is hydrogen, alkyl having 1 to about 20 carbon atoms, alkenyl having 1 to about 20 carbon atoms or aryl;
- n is an integer of 1 to 6;
- R.sub.4, R.sub.5, and R.sub.6 are each independently selected from the group consisting of alkyl containing 1 to about 20 carbon atoms, ##STR33## wherein R.sub.7 is hydrogen, alkyl having 1 to about 20 carbon atoms, and .dbd.R.sub.2 with the proviso that only one of R.sub.4, R.sub.5 and R.sub.6 may be ##STR34## and wherein R.sub.2 is independently selected from the group consisting of .dbd.CH.sub.2, cyclohexyl, ##STR35## alkyl containing 1 to about 20 carbon atoms and alkenyl containing 1 to about 20 carbon atoms.
A process of inhibiting the liberation of hydrogen sulfide gas during storage or transport of a crude oil, petroleum residuum or petroleum fuel medium containing hydrogen sulfide, comprising adding to said medium an effective amount of a nonacidic imine compound which is the condensation product of an amine or a polyamine and an aldehyde, dialdehyde or ketone, the imine compound being selected from the group consisting of (1) unhindered imine compounds and (2) polyimine compounds.
A process of inhibiting the liberation of hydrogen sulfide gas during storage or transport of the crude oil, petroleum residuum or petroleum fuel medium containing hydrogen sulfide, comprising adding to said medium an effective amount of a nonacidic imine compound which is the condensation product of an amine or a polyamine and an aldehyde, dialdehyde or ketone, the imine compound being selected from the group consisting of a compound of the structure ##STR36## a compound of the structure ##STR37## a compound of the structure ##STR38## a compound of the structure ##STR39## a compound of the structure ##STR40## a compound of the structure ##STR41## N,N'-2-ethyl-hexylidene-2,5-diaminohexane, a mixture of N,N'-2-ethylhexylidene-2,2,4-trimethylhexamethylenediamine and N,N'-2-ethylhexylidene-2,4,4-trimethylhexamethylenediamine, N,N'-dimethylhexylidene-vishexylmethylenetriamine, N-2-ethylhexylidene-N'-3-ethylenehexylidene-2-aminoethylpiperazine, a compound of the structure
- C.sub.4 H.sub.9 N.dbd.CH--CH.dbd.NC.sub.4 H.sub.9
- a compound of the structure ##STR42## and a compound of the structure ##STR43##
A composition comprising petroleum residua and a sufficient amount of an imine additive to inhibit hydrogen sulfide gas evolution, the amine additive being selected from the group consisting of ##STR52## a compound of the structure ##STR53## a compound of the structure ##STR54## a compound of the structure ##STR55## a compound of the structure ##STR56## a compound of the structure ##STR57## N,N'-2-ethyl-hexylidene-2,5-diaminohexane,N,N'-2-ethylhexylidene-2,2,4-tri m ethylhexamethylenediamine and N,N'-2-ethylhexylidene-2,4,4-trimethylhexamethylenediamine, N,N'-dimethylhexylidene-bishexamethylenetriamine, N-2-ethylhexylidene-N'-3-ethylenehexylidene-2-aminoethylpiperazine, a compound of the structure
- C.sub.4 H.sub.9 N.dbd.CH--CH.dbd.NC.sub.4 H.sub.9
- a compound of the structure ##STR58## a compound of the structure ##STR59##
Dependencies are inferred from the claim text.