Method of reclaiming brine solutions using an organic chelant
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-017/00
E21B-043/34
출원번호
UP-0701780
(2007-02-02)
등록번호
US-7678281
(2010-04-21)
발명자
/ 주소
Javora, Paul H.
Qu, Qi
출원인 / 주소
BJ Services Company
대리인 / 주소
Jones, John Wilson
인용정보
피인용 횟수 :
0인용 특허 :
34
초록▼
A method of reclaiming a well completion brine solution containing metal impurities by introducing to the brine solution an organic chelant of the formula: and may be either a neutral compound, a corresponding salt, or a corresponding quaternary salt, wherein: D is F-A (Y3)u(Y
A method of reclaiming a well completion brine solution containing metal impurities by introducing to the brine solution an organic chelant of the formula: and may be either a neutral compound, a corresponding salt, or a corresponding quaternary salt, wherein: D is F-A (Y3)u(Y4)v; R is independently selected from Cp or CpC(O); Cp is a C1-C36, preferably a C8-C36, hydrocarbyl group, optionally substituted with one or more substituents selected the group consisting of halogen, hydroxyl, sulfate, CH2CO2Z or —(CH2)nPO(OZ)2 groups; each A is independently selected from —N and —P; Y1 is independently selected from J, —[(F)-A(J)]w Y6 and R; J, R1, Y2, Y3, Y4, Y5 and Y6 are independently selected from the group consisting of —H, R, —(F)nCO2Z and —(CH2)nPO(OZ)2; each F is independently selected from a C1-C12 hydrocarbyl group, optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxyl, sulfate, CH2CO2Z or —(CH2)nPO(OZ)2 groups; Z is —H, a balanced organic counterion or a balanced counterion of an alkali or alkaline earth metal, Zn or NH4+ or a mixture thereof; m is 0 to 7; n is 1 to 7; r+s+t is 1 or 2; u+v is 1 or 2; and w is 0 to 7 provided when m is 0, no more than one of R1, Y1, Y2 and Y5 can be —H. An organic chelant may be introduced to the brine containing the metal impurities. The brine may contain an oxidizer. Further, the pH of the brine being reclaimed or the brine reclaimed may be adjusted by the addition of a pH adjustment agent.
대표청구항▼
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 oxidizer and at least one organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate, t
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 oxidizer and at least one organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate, the organic chelant being a neutral compound or a corresponding salt of the formula: wherein: D is F-A (Y3 )u (Y4)v; R is independently selected from Cp or CpC(O); Cp is a C1 -C36 hydrocarbyl group, optionally substituted with one or more substituents selected the group consisting of halogen, hydroxyl, sulfate, CH2CO2Z or —(CH2)nPO(OZ)2 groups; each A is independently selected from —N and —P; Y1 is independently selected from J, —[(F)-A(J)]w Y6 and R; J, R1, Y2 , Y3, Y4, Y5 and Y6 are independently selected from the group consisting of —H, R, —(F)nCO2Z and —(CH2)nPO(OZ)2; each F is independently selected from a C1-C12 hydrocarbyl group, optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxyl, sulfate, CH2CO2Z or —(CH2)nPO(OZ)2 groups; Z is —H, a balanced organic counterion or a balanced counterion of an alkali or alkaline earth metal, Zn or NH4+ or a mixture thereof; m is 0 to 7; n is 1 to 7; r+s+t is 1 or 2; u+v is 1 or 2; and w is 0 to 7 provided when m is 0, no more than one of R1, Y1, Y2 and Y5 can be —H; 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 s and t are 0. 3. The method of claim 2, wherein the at least one organic chelant is a compound of the formula: wherein R1 is —H, —(CH2)nPO(OZ)2 or —(F)n CO2Z; and Y3 and Y5 are independently selected from —(F)n CO2Z, —(CH2)nPO(OZ)2 and —H; and k is from 1 to 6. 4. The method of claim 3, wherein the at least one organic chelant is selected from the group consisting of: (a.) R—N(CH2COOZ)—(CH2)k—NH2; (b.) R—N(CH2COOZ)—(CH2)k—NH(CH2COOZ) (c.) R—NH—(CH2)k—NH(CH2COOZ) (d.) R—N(CH2COOZ)—(CH2)k—N(CH2COOZ)2; (e.) R—NH—(CH2)k—N (CH2COOZ)2; wherein R is Cp or CpC(O). 5. The method of claim 4, wherein at least one organic chelant is selected from the group consisting of: (a.) R—N(CH2COOZ)—(CH2)k—NH(CH2COOZ); (b.) R—N(CH2COOZ)—(CH2)k—N(CH2COOZ)2; (c.) R—NH—(CH2)k—N(CH2COOZ)2; wherein R is Cp or CpC(O). 6. The method of claim 4, wherein the Cp group is selected from C8 to C36. 7. The method of claim 6, wherein the Cp group is selected from C12 to C36. 8. The method of claim 7, wherein the Cp group is selected from C12 to C22. 9. The method of claim 4, wherein k is 3. 10. The method of claim 2, wherein the at least one organic chelant is a compound of the formula: wherein Y3 is —H, Cp or CpC(O), —(F)nCO2Z or —(CH2)nPO(OZ)2; and R1 and Y5 are independently selected from —(CH2)nPO(OZ)2, —(F)n CO2Z and —H; and k is from 1 to 6. 11. The method of claim 10, wherein the at least one organic chelant is selected from the group consisting of: (a.) R—N (R1)—(CH2)k—NH(CH2COOZ); (b.) R—N (R1)—(CH2)k—N(CH2COOZ)2; (c.) R—NH —(CH2)k—NY5(CH2COOZ); (d.) R—N(CH2COOZ)—(CH2)k—NHY5; (e.) R—N(CH2COOZ)—(CH2)k—NY5(CH2COOZ). 12. The method of claim 11, wherein the Cp group of R is selected from C8 to C36. 13. The method of claim 11, wherein k is 3 and/or each Z is —H. 14. The method of claim 13, wherein the Cp group of R is selected from C8 to C36. 15. The method of claim 11, wherein R1 is —(F)n CO2Z or —H. 16. The method of claim 2, wherein at least one R1, Y3 or Y5 is —(F)nCO2Z or —(CH2)nPO(OZ)2. 17. The method of claim 1, wherein the at least one organic chelant is a compound of the formula: wherein R1 is —H, —(CH2)nPO(OZ)2 or —(F)nCO2Z; and Y5 is —(F)nCO2Z or —(CH2)nPO(OZ)2. 18. The method of claim 17, wherein the at least one organic chelant is a compound of the formula: R—NH(CH2COOZ) or R—N(CH2COOZ)2. 19. The method of claim 1, wherein the at least one organic chelant is a salt of the formula: wherein R1 is —H, Cp, —(CH2)nPO(OZ)2 or —(CH2)nCO2 Z; each of Y4 and Y5 are independently selected from —H, —(CH2)nPO(OZ)2 or —(CH2)nCO2Z; X is an anion; and k and n are independently selected from 1 to 6. 20. The method of claim 1 wherein at least one J, R1, Y2, Y3, Y4, Y5 or Y6 is —(F)nCO2Z or —(CH2)nPO(OZ)2. 21. The method of claim 1, wherein the oxidizer is capable of converting Fe++ to Fe+++. 22. The method of claim 1, wherein the oxidizer is a selected from the group consisting of calcium peroxide, magnesium peroxide, calcium hypochlorite, oxygen, hydrogen peroxide, an organic peroxide and sodium hypochlorite. 23. The method of claim 22, wherein the oxidizer is an organic peroxide selected from the group consisting of butyl peroxide, butyl peroxybenzoate, cumene hydroperoxide, lauroyl peroxide, benzoyl peroxide, peroxybenzoic acid and peroxyacetic acid. 24. The method of claim 1, wherein the chelant admixed with the well completion brine is a powder or is in a slurry or solution. 25. The method of claim 24, wherein the chelant admixed with the well completion brine is in a slurry and further wherein the slurry comprises water, glycol or a brine. 26. A method of reclaiming a well completion brine comprising mixing the brine containing metal impurities with at least one organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate and then removing the complexed metal precipitate from the brine to render a reclaimed brine, wherein the method further comprises adjusting the pH of the well completion brine and/or the reclaimed brine and further wherein the organic chelant is either a neutral compound or a corresponding salt of the formula: wherein: D is F-A (Y3)u (Y4)v; R is independently selected from Cp or CpC(O); Cp is a C1-C36 hydrocarbyl group, optionally substituted with one or more substituents selected the group consisting of halogen, hydroxyl, sulfate, CH2CO2Z or —(CH2)nPO(OZ)2 groups; each A is independently selected from —N and —P; Y1 is independently selected from J, —[(F)A (J)]w Y6 and R; J, R1, Y2, Y3, Y4, Y5 and Y6 are independently selected from the group consisting of —H, R, —(F)nCO2Z and —(CH2)nPO(OZ)2; each F is independently selected from a C1-C12 hydrocarbyl group, optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxyl, sulfate, CH2CO2Z or —(CH2)nPO(OZ)2 groups; Z is —H, a balanced organic counterion or a balanced counterion of an alkali or alkaline earth metal, Zn or NH4+ or a mixture thereof; m is 0 to 7; n is 1 to 7; r+s+t is 1 or 2; u+v is 1 or 2; and w is 0 to 7 provided when m is 0, no more than one of R1, Y1, Y2 and Y5 can be —H wherein the metal impurities contain iron and further wherein the complexed metal precipitate contain iron. 27. The method of claim 26, wherein the pH is adjusted by the addition of a pH adjustment agent selected from the group consisting of sodium hydroxide, sodium oxide, potassium hydroxide, potassium oxide, magnesium hydroxide, magnesium oxide, lime and quick lime to the well completion brine. 28. The method of claim 26, wherein the at least one organic chelant is selected from the group consisting of: (a.) R—N(CH2COOZ)—(CH2)k—NH2; (b.) R—N(CH2COOZ)—(CH2)k—NH(CH2COOZ) (c.) R—NH —(CH2)k—NH(CH2COOZ) (d.) R—N(CH2COOZ)—(CH2)k—N(CH2COOZ)2; (e.) R—NH —(CH2)k—N (CH2COOZ)2; wherein R is Cp or CpC(O). 29. The method of claim 28, wherein the Cp group of R is selected from C8 to C36. 30. The method of claim 28, wherein k is 3 and/or Z is —H. 31. The method of claim 30, wherein the Cp group of R is selected from C8 to C36. 32. The method of claim 26, further comprising adding to the brine containing metal impurities at least one oxidizer which is capable of converting Fe++ to Fe+++.
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