IP Library › Granted Patent US 9,017,519
Granted Patent B2
US 9,017,519 · App. 14/284,585 · Granted Apr 28, 2015

Process for the preparation of surface-treated calcium carbonate material and use of same in the control of organic material in an aqueous medium

Inventors: Matthias Buri (Rothrist, CH); Samuel Rentsch (Aarburg, CH); Patrick A. C. Gane (Rothrist, CH); Daniel Gantenbein (Elnesvagen, NO); Joachim Schölkopf (Killwangen, CH)
Assignee: Omya International AG
C02F1/682B01J20/223C01P2004/51C01P2004/62C01P2006/12C02F1/281C02F1/288C02F1/681C07C68/04C09C1/021D21H17/14Y10T428/2982
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Quick Facts
Patent No.
US 9,017,519
App. No.
14/284,585
Granted
Apr 28, 2015
Kind
B2
Abstract

The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.

Claims (33)

1. A process for controlling an organic material in an aqueous medium comprising contacting the aqueous medium with surface-treated calcium carbonate material or an aqueous suspension comprising surface-treated calcium carbonate material, wherein the surface-treated calcium carbonate material is at least one calcium carbonate-containing material treated with at least one salt of a C 5 -C 28 fatty acid(s) selected from the group consisting of (i) a mono-alcohol primary alkanolamine salt of a C 5 -C 28 fatty acid(s), (ii) a polyethyleneimine salt of a C 5 -C 28 fatty acid(s), and (iii) a mixture thereof.

2. The process according to claim 1 , wherein the organic material is petroleum, a petroleum derivative, a stickie, pitch, or any mixture thereof.

3. The process according to claim 1 , wherein the organic material is pitch.

4. The process according to claim 1 , wherein the organic material is non-ionic and/or anionic pitch.

5. The process according to claim 1 , wherein the aqueous medium, prior to being contacted with the surface-treated calcium carbonate, has 1,000 to 5,000 mg O 2 /dm 3 of organic material, evaluated based on the Chemical Oxygen Demand (COD).

6. The process according to claim 1 , wherein the aqueous medium, prior to being contacted with the surface-treated calcium carbonate, has a pH greater than 6.

7. The process according to claim 1 , wherein the aqueous medium, prior to being contacted with the surface-treated calcium carbonate, has a pH greater than 7.

8. The process according to claim 1 , wherein the surface-treated calcium carbonate is dosed in the aqueous medium in an amount corresponding to 0.05 to 5 wt.-% per 1,000 mg O 2 /dm 3 , wherein said mg O 2 /dm 3 is determined by the COD measurement method.

9. The process according to claim 1 , wherein the surface-treated calcium carbonate is dosed in the aqueous medium in an amount corresponding to 0.1 to 1 wt.-% per 1,000 mg O 2 /dm 3 , wherein said mg O 2 /dm 3 is determined by the COD measurement method.

10. The process according to claim 1 , wherein the surface-treated calcium carbonate is dosed in the aqueous medium in an amount corresponding to 0.15 to 0.5 wt.-% per 1,000 mg O 2 /dm 3 , wherein said mg O 2 /dm 3 is determined by the COD measurement method.

11. The process according to claim 1 , wherein the calcium-carbonate containing material comprises ground natural calcium carbonate, dolomite, precipitated calcium carbonate or any mixture thereof.

12. The process according to claim 1 , wherein the calcium-carbonate containing material contains at least 50% by weight of calcium carbonate relative to the total weight of the calcium-carbonate containing material.

13. The process according to claim 1 , wherein the calcium-carbonate containing material contains at least 90% by weight of calcium carbonate relative to the total weight of the calcium-carbonate containing material.

14. The process according to claim 1 , wherein 30 to 85% by weight of the calcium carbonate material has a particle diameter of less than 1 μm.

15. The process according to claim 1 , wherein 60 to 80% by weight of the calcium carbonate material has a particle diameter of less than 1 μm.

16. The process according to claim 1 , wherein the calcium carbonate material has a d 50 value of from 0.4 to 5 μm.

17. The process according to claim 1 , wherein the calcium carbonate material has a d 50 value of from 0.5 to 1 μm.

18. The process according to claim 1 , wherein the calcium carbonate material has a BET specific surface area of 1 to 200 m 2 /g.

19. The process according to claim 1 , wherein the calcium carbonate material has a BET specific surface area of 7 to 15 m 2 /g.

20. The process according to claim 1 , wherein the calcium carbonate material is provided in the form of an aqueous suspension.

21. The process according to claim 1 , wherein the calcium carbonate material comprises 0.05 to 1 mg dispersant or grinding aid per m 2 of calcium-carbonate containing material.

22. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a salt of a C 6 -C 24 fatty acid.

23. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a salt of a C 8 -C 18 fatty acid.

24. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) has an iodine number of less than 5 g I 2 /100 g of fatty acid salt.

25. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a salt of a linear fatty acid if the fatty acid is a C 6 -C 9 fatty acid.

26. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a blend of palmitic acid salt(s) and stearic acid salt(s).

27. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a blend of palmitic acid salt(s) and stearic acid salt(s) in a weight ratio of palmitic acid:stearic acid of 2:1 to 1:2.

28. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a C 5 -C 28 fatty acid 30 to 110 mole % neutralized with a mono-alcohol primary alkanolamine and/or a polyethyleneimine.

29. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a C 5 -C 28 fatty acid 35 to 45 mole % neutralized with polyethyleneimine.

30. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a C 5 -C 28 fatty acid 90 to 100 mole % neutralized with a mono-alcohol primary alkanolamine.

31. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a polyethyleneimine salt of a C 5 -C 28 fatty acid(s), wherein the polyethyleneimine is a linear polyethyleneimine having a molecular weight of from 140 to 700 g/mol.

32. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a polyethyleneimine salt of a C 5 -C 28 fatty acid(s), wherein the polyethyleneimine is a linear polyethyleneimine having a molecular weight of from 146 to 232 g/mol.

33. The process according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a monoalcohol primary alkanolamine salt of a C 5 -C 28 fatty acid(s).

Assignments (1)
CHANGE OF NAME Recorded Mar 26, 2015
From: OMYA DEVELOPMENT AG
To: OMYA INTERNATIONAL AG
Reel/Frame 035295/0867 →
Priority Claims (1)
EP 10170110 · Jul 20, 2010 · regional
Continuity (3)
Division 13807940
Provisional Application 61500171 · Jun 23, 2011
Related Publication 20140251916A1 · Sep 11, 2014