Method of reclaiming brine solutions using an organic chelant

Details Method of reclaiming brine solutions using an organic chelant Method of reclaiming brine solutions using an organic chelant

2006-12-05

2006-12-05

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C166S244100, C166S267000, C175S066000, C210S688000, C210S694000, C210S722000, C210S729000, C210S912000

Reexamination Certificate

active

07144512

ABSTRACT:
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)R20or 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)R2group optionally substituted with a —COOH or —PO(OH)R20 or a salt or ester thereof, —SE or —OE group, wherein R2and R3are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1or —H; R1is a C1–C30alkyl or aralkyl group or a derivative thereof and R20is —OH or R1.

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