Control of scale formation in produced water evaporators

Details Control of scale formation in produced water evaporators Control of scale formation in produced water evaporators

C - Chemistry, Metallurgy

02

F

C02F 9/12 (2006.01) E21B 43/24 (2006.01) B08B 17/00 (2006.01)

Patent

CA 2744738

Methods for inhibiting scale formation in evaporators of the type used to produce aqueous distillate from produced waters such as those waters that are commonly formed in steam assisted gravity drainage (SAGD) oil recovery methods are provided. In accordance with the invention, a chelant selected from EDTA, DTPA, NTA, and HEEDTA is added to the recirculating evaporator system brine or to the feedwater to such systems.

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