IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0623044
(2003-07-18)
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발명자
/ 주소 |
- Qu,Qi
- Javora,Paul H.
- Boles,Joel L.
- Berry,Sandra L.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
29 |
초록
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A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group--CO2H or--PO(OH)R20 or a salt or ester thereof,
A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group--CO2H or--PO(OH)R20 or a salt or ester thereof,--C(O)--,--OE,--SE,--N═C(R2)R3, EO--N═C(R2)R3,--N(R2)R3, and--N(C(O)R1)R2 group optionally substituted with a--COOH or--PO(OH)R20 or a salt or ester thereof,--SE or--OE group, wherein R2 and R3 are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1 or--H; R1 is a C1-C30 alkyl or aralkyl group or a derivative thereof and R20 is--OH or R1.
대표청구항
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The invention claimed is: 1. A method of reclaiming a well completion brine comprising the steps of: a. mixing the brine containing metal impurities with an organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate; and b. removing the complexed
The invention claimed is: 1. A method of reclaiming a well completion brine comprising the steps of: a. mixing the brine containing metal impurities with an organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate; and b. removing the complexed metal precipitate from the brine wherein the metal impurities contain iron and further wherein the complexed metal precipitate contains iron. 2. The method of claim 1, wherein the organic chelant contains up to about 120 carbon atoms and further contains at least one functional group selected from the group consisting of--CO2H or--PO(OH)R20 or a salt or ester thereof,--C(O)--,--OE,--SE,--N═C(R2)R3, EO--N═C(R2)R3,--N(R2)R3, and a--N(C(O)R1)R2 group, optionally substituted with a--COOH or--PO(OH)R20 or a salt or ester thereof or--SE or--OE group, wherein R2 and R3 are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1 or--H; R1 is a C1-C30 alkyl or aralkyl group or a derivative thereof; and R20 is either--OH or R1. 3. The method of claim 2, wherein the organic chelant is further substituted with at least one group selected from--CO2H or--PO(OH)R20 or a salt or ester thereof,--C(O)--,--OE,--SE,--N═C(R2)R3, EO--N═C(R2)R3,--P(R2)R3,--POR2R3,--PO3,--OPO3,--SO3,--OSO3,--NO2,--N(R 2)R3 or--N(C(O)R1)R2. 4. The method of claim 3, wherein the organic chelant is a dioxime having the structural formula: description="In-line Formulae" end="lead"R2 C(═N--OE)(CnH2nYw)x(R6) yYw(CnH2n)zC(═N--OE) R3description="In-line Formulae" end="tail" or a derivative thereof; wherein R2 and R3 are independently selected from R1,--(CH2)sOE,--(CH2) sSE or--(CH2)sCOOH or--CH2) sPO(OH)R20 or a salt or ester thereof, R1 is--H or a C1-C30 alkyl or aralkyl group or derivative thereof, R6 is CnH2n or a derivative thereof, E is R1 or--H; Y is--O,--S,--P or--N; s is 1 to 4, n is 0 to 5, w is 0 or 1 and x, y and z are independently 0 to 5. 5. The method of claim 2, further comprising mixing the brine with an oxidizer. 6. The method of claim 5, wherein the oxidizer is a slow reacting oxidizer. 7. The method of claim 6, wherein the oxidizer is calcium peroxide or magnesium peroxide. 8. The method of claim 7, wherein the organic chelant is benzoic acid or a salt or ester thereof. 9. The method of claim 2, wherein the functional group is--COOH or a salt or ester thereof. 10. The method of claim 9, wherein the organic chelant is benzoic acid or a salt or ester thereof. 11. The method of claim 9, wherein the organic chelant is further substituted with at least one group selected from--OE,--SE,--P(R2)R3,--POR2R3,--PO3,--OPO3,--SO3,--OSO3,--NO2,--N═ C(R2)R3, EO--N═C(R2)R3,--N(R 2)R3,--N(CH2)2 and--N(C(O)R1) R2 optionally substituted with a--COOH or--PO(OH)R20 group or a salt or ester thereof or with an--OE or _SE group. 12. The method of claim 11, wherein the organic chelant further contains the functional group--NR2R3 optionally substituted with a--COOH or--PO(OH)R20 group or a salt or ester thereof or with an--OE or--SE group. 13. The method of claim 12, wherein the organic chelant is nitrilotriacetic acid or a salt or ester thereof. 14. The method of claim 11, wherein the organic chelant is an ethylene diamine type of the structural formula: description="In-line Formulae" end="lead"(F)(R 9)A(U)k(V)t(CnH2n)A(R10) (R11) (I)description="In-line Formulae" end="tail" or a derivative thereof wherein A is nitrogen or phosphorus; R8, R9, R10 and R11 are independently--(CH2) xCOOH or--(CH2)xPO(OH)R20 or a salt or ester thereof,--(CH2)xOE or (CH2)xSE or a derivative thereof; R5 is--H or a C1-C30 alkyl or aralkyl group or derivative thereof; R14 is R5 or R8; F is--(CH2)xCOOH or--(CH2) xPO(OH)R20 or a salt or ester thereof,--OE,--SE,--(CH2)xSE or--(CH2)xOE or a derivative thereof; U is--(CH2CONR14--)x; V is--(CnH2nAR8--); n is 1 to 15; x is 1 to 4; and k, z and t are independently 0 to 2. 15. The method of claim 14, wherein the organic chelant is selected from the group consisting of ethylene diamine tetra acetic acid; hydroxyethylenediamine triacetic; O,O'-bis(2-aminoethyl)ethyleneglycol-N, N,N',N'-tetraacetic acid; N-(glycylglycyl)-1,2-diaminoethane-N',N',N",N"-tetraacetic acid. 16. The method of claim 9, wherein the organic chelant further contains the functional group--N(COR1)R2 group optionally substituted with a--COOH or--PO(OH)R20 group or a salt or ester thereof or with an--OE or SE group. 17. The method of claim 16, wherein the organic chelant contains from ten to one hundred twenty carbon atoms. 18. The method of claim 17, wherein the organic chelant contains a counter ion selected from the group consisting of ionic forms of sodium, potassium, cesium, ammonium, monoethanolamine, diethanolamine, triethanolamine, N-propylamine, isopropylamine, 2-amino-2-methyl-1,3-propane diol, 2-amino-2-methyl-1-propanol, 2-amino-2-ethyl-1,3-propane diol, tris(hydroxymethyl)aminomethane, group II metals, and a Group 3-7 transition metal. 19. The method of claim 9, wherein the organic chelant is substituted with at least one--OE,--SE,--POR2R3,--PO3,--OPO3,--SO3, or--OSO3 group. 20. The method of claim 19, wherein the organic chelant is substituted with an--OE group. 21. The method of claim 20, wherein the organic chelant is zinc di-(12-hydroxy-9-octadecenoate). 22. The method of claim 9, wherein the organic chelant is substituted with a--P(R2)R3 or--POR2R3 group. 23. The method of claim 22, wherein the organic chelant is of the formula (HOOCCH2)2PCH2CH2P(CH 2COOH)2 or a salt or ester thereof. 24. The method of claim 8, wherein the organic chelant is selected from the group consisting of benzoic acid; benzene-1,2-dicarboxylic acid; benzene-1,3,5-tricarboxylic acid; nonyl-1,3-dicarboxylic acid; and 1-hydroxy-2-napthoic acid and salts thereof. 25. The method of claim 2, wherein the organic chelant contains at least one--N(R2)R3,--N═C(R2) R3, EO--N═C(R2)R3 or a--N(C(O)R1 )R2 group wherein R2 and R3 independently may be substituted with a--COOH,--PO(OH)R20,--SE or--OE group or a salt or ester thereof. 26. The method of claim 25, wherein the organic chelant is N, N'-dimethyl-N,N'-dilauroylethylenediamine or a salt thereof. 27. The method of claim 25, wherein the organic chelant is 1, 2-diaminobenzene or a salt thereof. 28. The method of claim 25, wherein the organic chelant is iminobis (methylenephosphonic acid) or a salt or ester thereof. 29. The method of claim 25, wherein the organic chelant is further substituted with at least one group selected from--OE,--SE,--PO3,--OPO3,--SO3,--OSO3, or--NO2. 30. The method of claim 29, wherein the organic chelant is substituted with an--OE group. 31. The method of claim 30, wherein the organic chelant is 8-hydroxy quinoline or a salt thereof. 32. The method of claim 30, wherein the organic chelant is substituted with a--SO3 or a--OSO3 group. 33. The method of claim 25, wherein the organic chelant is substituted with a--SO3 or a--OSO3 group. 34. The method of claim 33, wherein the organic chelant is 1-aminobenzene-2-sulfonic acid or a salt thereof. 35. The method of claim 25, wherein the organic chelant is a nitrogen, phosphorous, oxygen or sulfur containing heterocyclic ring. 36. The method of claim 35, wherein the organic chelant is porphine or derivatives thereof or salts thereof. 37. The method of claim 25, wherein the organic chelant is selected from the group consisting of ethylenediaminetetraacetic acid, 1, 2-dimethylethylenedinitrilotetraacetic acid; DL-1-alkylethylenedinitrilotetraacetic acid N,N'-diamide; 1,2-dimethylethylenedinitrilotetraacetic acid N,N'-diamide; 1,2-phenylenedinitrilotetraacetic acid; N,N-dimethyl-2-aminophenol; and 4-phenyl-8-mercaptoquinoline and salts thereof. 38. The method of claim 2, wherein the functional group is--OE or--SE. 39. The method of claim 38, wherein the organic chelant is N-hydroxy-N-nitrosobenzenamine or a salt thereof. 40. The method of claim 38, wherein the organic chelant further contains at least one group selected from--PO3,--OPO3,--SO3,--OSO3, or--NO2. 41. The method of claim 40, wherein the organic chelant contains a--SO3 or--OSO3 group. 42. The method of claim 41, wherein the organic chelant is 1-hydroxybenzene-2-sulfonic acid or a salt thereof. 43. The method of claim 38, wherein the organic chelant contains a--PO3 or--OPO3 group. 44. The method of claim 40, wherein the organic chelant is 4-nitro-1,2-dihydroxy benzene or a salt thereof. 45. The method of claim 2, wherein the organic chelant is a diketone having the structural formula: description="In-line Formulae" end="lead"R12 C(O)(CnH2nYw)x(R6)y Yw(CnH2n)zC(O)R13description="In-line Formulae" end="tail" or derivative thereof wherein R12 and R13 are independently--H or a C1-C30 alkyl or aralkyl group optionally substituted with a--COOH or--PO(OH)R20 or a salt or ester thereof,--N(R2)R3,--SE or--OE group; R6 is CnH2n or a derivative thereof; Y is--O,--S,--P or--N; n is 1 to 30, w is 0 or 1, and x, y and z are independently 0 to 5. 46. The method of claim 45, wherein the organic chelant is pentane-2,4-dione or octadecane-2,4-dione. 47. The method of claim 4, wherein the organic chelant is 2,3-butanedionedioxime. 48. The method of claim 1, further comprising mixing the brine with an oxidizer. 49. The method of claim 48, wherein the oxidizer is a slow reacting oxidizer. 50. The method of claim 1, further comprising adding to the brine an absorbent or defoamer. 51. The method of claim 50, wherein the absorbent is activated carbon. 52. The method of claim 48, further comprising adding to the brine an absorbent or defoamer.
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