Iron sulfide dispersing agents
AssigneeNalco Chemical Company
InventorsSherri L. Fisher, Bradley D. Mercer
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Abstract
A method is disclosed for dispersing iron sulfide in hydrocarbon streams found in refinery and petrochemical plant operations. The dispersant comprises a free radically polymerized copolymer of an .alpha.-olefin of from about 10 to about 36 carbon atoms and maleic anhydride wherein the anhydride moieties along the copolymer backbone are substantially unhydrolyzed. The copolymer has a ratio of .alpha.-olefin to maleic anhydride of from about 1 to about 5 and a molecular weight of from 5000 to about 100,000.
Claims6
A method for dispersing iron sulfide in hydrocarbon and halogenated hydrocarbon streams, wherein the hydrocarbon stream contains iron sulfide precursors, the precursors being reactive with one another such that iron sulfide particles are immediately formed within the hydrocarbon streams when the precursors react, comprising:
- providing a dispersant comprising a copolymer of an .alpha.-olefin having from about 10 to about 35 carbon atoms and mixtures thereof and maleic anhydride, wherein the weight ratio of said .alpha.-olefin to said maleic anhydride is from about 1:1 to about 1:5 and the weight average molecular weight of said copolymer is from about 5000 to about 100,000 ;
- and
- injecting the dispersant into a hydrocarbon stream.
A method of dispersing iron sulfide in a hydrocarbon or halogenated hydrocarbon stream comprising:
- providing a dispersant comprising a copolymer of an .alpha.-olefin having from about 24 to about 28 carbon atoms and mixtures thereof and maleic anhydride, wherein the weight ratio of said .alpha.-olefin to said maleic anhydride is from about 1:1 to about 1:2 and the weight average molecular weight of said copolymer is from about 5000 to about 15000;
- injecting said dispersant into a hydrocarbon or halogenated hydrocarbon stream either containing iron sulfide or susceptible to the formation of iron sulfide.
Dependencies are inferred from the claim text.