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US 12,668,648 B2Granted
Polymer of 2-acrylamido-2-methylpropane sulphonic acid and use thereof
AssigneeSnf Group
InventorsCédrick Favero, Johann Kieffer
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Abstract
A water-soluble polymer has weight-average molecular weight greater than 10 million daltons. This polymer is obtained from 2-acrylamido-2-methylpropane sulfonic acid and/or one of its salts at least partially of renewable and non-fossil origin. The polymer can be used in the field of enhanced oil and gas recovery or in the treatment of tailings from the mining industry.
Claims16
A water-soluble polymer of 2-acrylamido-2-methylpropane sulfonic acid and/or one of its salts,
- wherein said 2-acrylamido-2-methylpropane sulfonic acid and/or one of its salts being at least partially of renewable and non-fossil origin,
- wherein said 2-acrylamido-2-methylpropane sulfonic acid and/or one of its salts comprises a biobased carbon content of between 5% by weight and 100% by weight relative to the total weight of carbon in said 2-acrylamido-2-methylpropane sulfonic acid, the biobased carbon content being measured according to method B of standard ASTM D6866-21, and
- wherein the water-soluble polymer has a weight-average molecular weight of between 11 and 40 million Daltons.
Dependencies are inferred from the claim text.