초록 ▼

Finely divided ferrous carbonate absorbent, siderite granules or absorbent particles made by mixing, agglomerating and shaping finely powdered ferrous carbonate, preferably siderite, in combination with minor effective amounts of water or an optional binder, followed by drying, are used to treat and

Finely divided ferrous carbonate absorbent, siderite granules or absorbent particles made by mixing, agglomerating and shaping finely powdered ferrous carbonate, preferably siderite, in combination with minor effective amounts of water or an optional binder, followed by drying, are used to treat and significantly reduce concentrations of hydrogen sulfide, carbonyl sulfide, organic disulfides, mercaptans and other sulfurous compounds and contaminants in gaseous and liquid fluid streams such as natural gas, light hydrocarbon streams, crude oil, acid gas mixtures, carbon dioxide gas and liquid streams, anaerobic gas, landfill gas, geothermal gases and liquids, and the like.

대표청구항 ▼

I claim: 1. An absorbent for sulfur-containing compounds disposed in streams of gas, liquid, or mixed gas and liquid at temperatures ranging from about 52 to about 130° F. and at pressures ranging from about 200 to about 500 psig, the absorbent comprising ferrous carbonate as its principal abs

I claim: 1. An absorbent for sulfur-containing compounds disposed in streams of gas, liquid, or mixed gas and liquid at temperatures ranging from about 52 to about 130° F. and at pressures ranging from about 200 to about 500 psig, the absorbent comprising ferrous carbonate as its principal absorptive component. 2. The absorbent of claim 1, comprising from about 50 to about 100 weight percent ferrous carbonate. 3. The absorbent of claim 2, comprising about 95 weight percent ferrous carbonate. 4. The absorbent of claim 2, further comprising from about 2 to about 10 weight percent of a binder. 5. The absorbent of claim 4, comprising about 5 weight percent of a binder. 6. The absorbent of claim 1 wherein the ferrous carbonate is in the form of the mineral siderite. 7. The absorbent of claim 6 wherein the siderite is in the form of granules. 8. The absorbent of claim 6 wherein the siderite is in the form of agglomerates. 9. The absorbent of claim 6 wherein the siderite is in the form of extrudates. 10. The absorbent of claim 4 wherein the binder is calcium aluminate cement. 11. The absorbent of claim 7 where the granules have particle sizes ranging between about 1/16 inch and about 5/16 inch. 12. The absorbent of claim 9 wherein the extrudates have a length not exceeding about 5/16 inch. 13. The absorbent of claim 1 in the form of agglomerated and densified powder. 14. The absorbent of claim 1 in the form of particles selected from the group consisting of pellets, prills and spheroids. 15. The absorbent of claim 13 comprising powdered siderite in combination with a binder. 16. The absorbent of claim 15 wherein the binder comprises calcium aluminate. 17. The absorbent of claim 15 comprising from about 50 to about 100 weight percent siderite, from about 2 to about 10 weight percent binder, and a moisture content less than 3 weight percent. 18. The absorbent of claim 15 wherein the powdered siderite has a particle size of about 100 mesh. 19. The absorbent of claim 13, made by blending powdered siderite and calcium aluminate cement in the presence of water, and thereafter extruding, sizing and drying the resultant product. 20. A method for making an absorbent that is useful for removing sulfur-containing compounds disposed in streams of gas, liquid, or mixed gas and liquid by providing from about 50 to about 100 parts by weight of ferrous carbonate having a particle size of about 100 mesh, by blending with the ferrous carbonate from about 2 parts by weight to about 10 parts by weight cementitious binder and from about 15 to about 25 parts by weight water, by extruding the blended ferrous carbonate, cementitious binder and water to produce an extrudate of desired length, and by thereafter drying the extrudate to a moisture content less than 3 weight percent. 21. The method of claim 20 wherein the ferrous carbonate is siderite. 22. The method of claim 20 wherein the cementitious binder comprises calcium aluminate. 23. The method of claim 21, wherein about 5 parts by weight cementitious binder and about 20 parts by weight water are blended with about 95 parts by weight siderite powder. 24. The method of claim 23 wherein the siderite powder has a particle size of about 100 mesh. 25. A method for absorbing sulfur-containing compounds disposed in a stream of gas, liquid, or mixed gas and liquid at temperatures ranging from about 52 to about 130° F. and at pressures ranging from about 200 to about 500 psig by providing an absorbent principally comprising ferrous carbonate as its principal absorptive component and by contacting the ferrous carbonate with the stream. 26. The method of claim 25 wherein the ferrous carbonate is siderite. 27. The method of claim 26 wherein the absorbent is in the form of pellets made from a blend of powdered siderite and a cementitious binder, together with sufficient water to hydrate the cement. 28. The method of claim 26 wherein the pellets comprise from about 70 to about 100 weight percent siderite and from about 2 to about 10 weight percent cementitious binder. 29. The method of claim 27 wherein the cementitious binder is calcium aluminate cement. 30. The method of claim 27 wherein the pellets are extruded. 31. The method of claim 27 wherein the pellets are dried to a moisture content less than 3 weight percent. 32. The method of claim 25 wherein the sulfur-containing compounds are selected from the group consisting of hydrogen sulfide, carbonyl sulfide, organic disulfides and mercaptans. 33. The method of claim 27 wherein the pellets are arranged in a bed. 34. The method of claim 33 wherein the stream comprises a fluid selected from the group consisting of natural gas, natural gas liquids, light light hydrocarbons, crude oil, acid gas mixtures, gaseous carbon dioxide, anaerobic gas, landfill gas, and geothermal fluids. 35. The method of claim 25 wherein the stream comprises sour gas inside a well bore and wherein the ferrous carbonate is finely divided and is distributed in a drilling mud that is circulated through the well bore. 36. The absorbent of claim 1 wherein the sulfur-containing compounds are selected from the group consisting of hydrogen sulfide, carbonyl sulfide, organic disulfides and mercaptans. 37. The absorbent of claim 1 wherein the stream comprises a fluid selected from the group consisting of natural gas, natural gas liquids, light hydrocarbons, crude oil, acid gas mixtures, gaseous carbon dioxide, anaerobic gas, landfill gas, and geothermal fluids.