Method for treating a suspension of solid particles in water using a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropanesulfonic acid

Patent metadata

Field	Value
Publication number	US-11370749-B2
Application number	US-201816494587-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Mar 20, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

The present invention relates to a method for the treatment of a suspension of solid particles in water using water-soluble (co)polymers made from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof. This method is particularly useful for treating residues resulting from the mining industry.

First claim

The invention claimed is:

1. A method for the treatment of a suspension of solid particles in water, comprising placing said suspension in contact with at least one water-soluble (co)polymer made from 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof,
the 2-acrylamido-2-methylpropane sulfonic acid being a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, and 46.04°, all peak values being +/−0.1°.

2. The method according to claim 1 , wherein the water-soluble (co)polymer is at the least made from 2-acrylamido-2-methylpropane sulfonic acid, 50% to 100% of the 2-acrylamido-2-methylpropane sulfonic acid being in hydrated crystalline form.

3. The method according to claim 2 , wherein the water-soluble (co)polymer is made from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof, and from at least one nonionic monomer, and/or at least one anionic monomer.

4. The method according to claim 2 , wherein the 2-acrylamido-2-methylpropane sulfonic acid in hydrated crystalline form is partially or totally salified before polymerization.

5. The method according to claim 4 , wherein the water-soluble (co)polymer is made from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof, and from at least one nonionic monomer, and/or at least one anionic monomer.

6. The method according to claim 5 , wherein the water-soluble (co)polymer is made from at least one nonionic monomer and/or at least one anionic monomer, and wherein:
the at least one nonionic monomer is chosen from the group consisting of acrylamide, methacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide and N-methylolacrylamide, N-vinylformamide, N-vinyl acetamide, N-vinylpyridine, N-vinylpyrrolidone, N-vinyl imidazole, N-vinyl succinimide, acryloyl morpholine (ACMO), acryloyl chloride, glycidyl methacrylate, glyceryl methacrylate, diacetone acrylamide and isoprenol; and
the at least one anionic monomer is chosen from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, acrylamido undecanoic acid, 3-acrylamido 3-methylbutanoic acid, maleic anhydride, vinylsulfonic acid, vinylphosphonic acid, allylsulfonic acid, methallylsulfonic acid, 2-methylidenepropane-1,3-disulfonic acid, 2-sulfoethylmethacrylate, sulfopropylmethacrylate, sulfopropylacrylate, allylphosphonic acid, styrene sulfonic acid, and 2-acrylamido-2-methyl propane disulfonic acid; and water-soluble salts of these monomers.

7. The method according to claim 6 , wherein the water-soluble (co)polymer is made from between 1 and 99.9 mol % of nonionic monomer(s) in relation to the total number of monomers and comprises from 0.1 to 99 mol % 2-acrylamido-2-methylpropane sulfonic acid, 50% to 100% of the 2-acrylamido-2-methylpropane sulfonic acid being in hydrated crystalline form.

8. The method according to claim 1 , wherein the 2-acrylamido-2-methylpropane sulfonic acid in hydrated crystalline form is partially or totally salified before polymerization.

9. The method according to claim 1 , wherein the water-soluble (co)polymer is made from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof, and from at least one nonionic monomer, and/or at least one anionic monomer.

10. The method according to claim 9 , wherein the at least one nonionic monomer is chosen from the group consisting of acrylamide, methacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide and N-methylolacrylamide, N-vinylformamide, N-vinyl acetamide, N-vinylpyridine, N-vinylpyrrolidone, N-vinyl imidazole, N-vinyl succinimide, acryloyl morpholine (ACMO), acryloyl chloride, glycidyl methacrylate, glyceryl methacrylate, diacetone acrylamide and isoprenol.

11. The method according to claim 9 , wherein the anionic monomer is chosen from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, acrylamido undecanoic acid, 3-acrylamido 3-methylbutanoic acid, maleic anhydride, vinylsulfonic acid, vinylphosphonic acid, allylsulfonic acid, methallylsulfonic acid, 2-methylidenepropane-1,3-disulfonic acid, 2-sulfoethylmethacrylate, sulfopropylmethacrylate, sulfopropylacrylate, allylphosphonic acid, styrene sulfonic acid, and 2-acrylamido-2-methyl propane disulfonic acid; and water-soluble salts of these monomers.

12. The method according to claim 1 , wherein the water-soluble (co)polymer is made from between 1 and 99.9 mol % of nonionic monomer(s) in relation to the total number of monomers and comprises from 0.1 to 99 mol % 2-acrylamido-2-methylpropane sulfonic acid, 50% to 100% of the 2-acrylamido-2-methylpropane sulfonic acid being in hydrated crystalline form.

13. The method according to claim 1 , wherein the water-soluble (co)polymer is an anionic (co)polymer based on acrylamide and 2-acrylamido-2-methylpropane sulfonic acid, 50% to 100% of the 2-acrylamido-2-methylpropane sulfonic acid being in the hydrated crystalline form and/or the salts thereof, or a terpolymer of acrylamide, of acrylic acid and of 2-acrylamido-2-methylpropane sulfonic acid, 50% to 100% of the 2-acrylamido-2-methylpropane sulfonic acid being in the hydrated crystalline form and/or the salts thereof.

14. The method according to claim 1 , wherein the water-soluble (co)polymer is made from a quantity of anionic monomers of between 5 and 70 mol %.

15. The method according to claim 1 , wherein the water-soluble (co)polymer has an average molecular weight in weight of between 0.5 and 40 million g/mol.

16. The method according to claim 1 , wherein the quantity of water-soluble (co)polymer added to the aqueous suspension is between 50 and 5,000 g per metric ton of dry solids of suspension.

17. The method according to claim 1 , wherein the aqueous suspension of solid particles results from ore extraction and consists of a suspension of mineral particles.

18. The method according to claim 1 , wherein the suspension of solid particles contains between 5% and 60% by weight of solids.

19. The method according to claim 1 , wherein the aqueous suspension is transported by means of a pipe to a depositing area and wherein the water-soluble (co)polymer is added within said pipe.

20. A method for the flocculation of a suspension of solid particles in water, comprising placing said suspension in contact with at least one water-soluble (co)polymer made from a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof,
the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, and 46.04°, all peak values being +/−0.1°.

Assignees

• Spcm Sa

Inventors

• Favero Cédrick
• Kieffer Johann
• Daguerre Frédéric

Classifications

• C07C309/15 Primary

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• E21B43/26

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• C08F20/56

  Acrylamide; Methacrylamide · CPC title

• E21B43/16

  Enhanced recovery methods for obtaining hydrocarbons · CPC title

• C09K8/80

  Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open · CPC title