BIODEGRADABLE CHELANT FOR SURFACTANT FORMULATION
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United States of America Patent
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Aug 6, 2015
app pub date -
Sep 16, 2013
filing date -
Oct 1, 2012
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Abstract
The present disclosure provides a surfactant composition for use in treating and recovering oil from an oil-bearing subterranean formation. The surfactant composition includes a primary surfactant and a biodegradable chelant comprising ethylenediamine disuccinc acid and/or sodium salts thereof. The composition may be injected into one or more injection wells and into the subterranean formation and oil can then be subsequently recovered from one or more producing wells
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