US 11,655,168 B2
Methods for wastewater treatment using alcohol ethoxylate surfactants
Jeff Allen Hurd, Calgary (CA); and Chunli Li, The Woodlands, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on May 22, 2020, as Appl. No. 16/881,857.
Prior Publication US 2021/0363035 A1, Nov. 25, 2021
Int. Cl. C02F 1/68 (2023.01); C02F 5/10 (2023.01); C09K 8/524 (2006.01); C02F 1/54 (2023.01); C02F 101/34 (2006.01); C02F 103/10 (2006.01)
CPC C02F 1/683 (2013.01) [C02F 5/10 (2013.01); C09K 8/524 (2013.01); C02F 1/547 (2013.01); C02F 2101/34 (2013.01); C02F 2103/10 (2013.01); C02F 2303/22 (2013.01); C02F 2305/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
introducing a wastewater treatment additive that comprises an alcohol ethoxylate surfactant and a non-polymeric chelating agent into wastewater recovered from at least a portion of a subterranean formation, wherein the wastewater comprises water and an organic foulant material, wherein the organic foulant material is humic acid, wherein the alcohol ethoxylate surfactant is present in an amount from about 500 parts per million to about 2,000 parts per million by volume of the wastewater treatment additive, wherein the alcohol ethoxylate is isotridecanol ethoxylate, wherein the non-polymeric chelating agent is present in an amount from about 1 part per million to about 500 parts per million by volume of the wastewater treatment additive, and wherein the wastewater treatment additive reduces the formation of humic acid aggregates.