Suppression of the evolution of hydrogen sulfide gases
AssigneePetrolite Corporation
InventorJerry J. Weers
Life of this patent
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Abstract
Hydrogen sulfide gas evolution from water or hydrocarbons, especially during storage or transport of petroleum residua is suppressed by the incorporation of an effective amount of a diamine of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently an alky radical containing 1 to 14 carbon atoms, (CH.sub.2).sub.n --OR.sub.6 or cycloalkyl containing 5 or 6 carbon atoms and R.sub.5 is hydrogen or methyl. R.sub.1 and R.sub.2 and R.sub.3 and R.sub.4 can be alkylene groups joined together with their respective adjacent N to form a heterocyclic ring. R.sub.6 is hydrogen or an alkyl radical having 1 to 5 carbon atoms and n is an integer of 1 to 5.
Claims36
A process of inhibiting the liberation of hydrogen sulfide gas from a material comprising water or a hydrocarbon containing dissolved hydrogen sulfide comprising adding to said material a sufficient amount of the following diaminomethane compound to inhibit hydrogen sulfide gas evolution:
- ##STR13## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently an alkyl radical containing one to 14 carbon atoms, (CH.sub.2).sub.n --OR.sub.6 or cycloalkyl having 5 or 6 carbon atoms or wherein R.sub.1 and R.sub.2 and/or R.sub.3 and R.sub.4 are alkylene groups joined together with their adjacent N to form a heterocyclic ring and wherein R.sub.5 is hydrogen or methyl and R.sub.6 is an alkyl having 1 to 5 carbon atoms and n is an integer of 1 to 5.
The process of claim wherein the diaminomethane compound is present in the amount of about 10 ppm to 10,000 ppm.
The process of claim wherein the diaminomethane compound has the chemical structure of ##STR14##
A composition comprising
- a. a material comprising water or a hydrocarbon, and
- b. a sufficient amount of the following diaminomethane compound to inhibit hydrogen sulfide gas liberation:
- ##STR18## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently an alkyl moiety containing 1 to 14 carbon atoms, (CH.sub.2).sub.n --OR.sub.6 or cycloalkyl having 5 or 6 carbon atoms or wherein R.sub.1 and R.sub.2 and/or R.sub.3 and R.sub.4 are alkylene groups joined together with their adjacent N to form a heterocyclic ring and R.sub.5 is hydrogen or methyl and R.sub.6 is an alkyl having 1 to 5 carbon atoms and n is an integer of 1 to 5.
Dependencies are inferred from the claim text.