Method of reclaiming brine solutions using an organic chelant
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-015/00
E21B-043/34
출원번호
UP-0701888
(2007-02-02)
등록번호
US-7674384
(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 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(R21)R20 or a salt or
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(R21)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(R21)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 and R21 are independently selected from —OH, —OR1 and R1.
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 organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate, the chelant being of the for
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, the chelant being of the formula (R5CO)(R4)AR6A(R8)(R9); or (R5CO)(R27)A(R28) or derivatives thereof, wherein each A is independently selected from nitrogen or phosphorus; R4, R8 and R9 are independently R28, —(CH2)xCOOH or —(CH2)xPO(R21)(R20) or a salt or ester thereof, —H, —(CH2)xOH or R5C(O)— or a derivative thereof; R5 is —H or a C1-C30 alkyl or aralkyl group or derivative thereof; R6 is CnH2n or a derivative thereof; R20 and R21 are independently —OH, —R1 or —OR1; R1 is a C1-C30 alkyl or aralkyl group or derivative thereof; R27 is —H, —R1, —R4, R28 or a derivative thereof; R28 is —(CHR30)y(CH2)ZCOOH or —(CH2)xPO(R21)R20 or a salt or ester thereof; R30 is —H, —COOH or R28; x is 1 to 4; y is 0 to 2; z is 0 to 6; and n is 1 to 15; 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 chelant is of the formula: (R5CO)(R4)AR6A(R8)(R9). 3. The method of claim 1, wherein the chelant is of the formula: (R5CO)(R27)A(R28). 4. The method of claim 1, further comprising mixing the brine with an oxidizer. 5. The method of claim 4, wherein the oxidizer is a slow reacting oxidizer. 6. The method of claim 1, wherein the organic chelant is N-acyl ethylenediaminetriacetic acid or a salt or ester thereof 7. The method of claim 6, wherein the organic chelant is N-lauroyl ethylenediaminetriacetic acid or a salt or ester thereof. 8. The method of claim 1, wherein the organic chelant contains a counter ion selected from the group consisting of ionic forms of lithium, 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) amino methane, zinc, group II metals, and a Group 3-7 transition metal. 9. The method of claim 1, wherein the organic chelant is selected from the group consisting of acyl glutamic acid; N-lauroyl glutamic acid; acyl sarcosinic acid; and N-lauroyl sarcosinic acid and salts or esters thereof. 10. The method of claim 1, further comprising adding to the brine an absorbent or defoamer. 11. The method of claim 10, wherein the absorbent or adsorbent is activated carbon. 12. The method of claim 1, wherein R5 is C6-C30 alkyl or aralkyl group or derivative thereof. 13. The method of claim 12, wherein R5 is C12-C30 alkyl or aralkyl group or derivative thereof. 14. The method of claim 12, wherein the organic chelant is the reaction product formed between a diamine and acyl glutamic acid, N-lauroyl glutamic acid, acyl sarcosinic acid, or N-lauroyl sarcosinic acid, or salts or esters thereof.
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