IP Library › Granted Patent US 9,017,518
Granted Patent B2
US 9,017,518 · App. 14/284,567 · 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
C02F1/682Y10T428/2982C01P2004/51C01P2004/62C01P2006/12C02F1/681C09C1/021B01J20/223C02F1/288C07C68/04D21H17/14C02F1/281
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Quick Facts
Patent No.
US 9,017,518
App. No.
14/284,567
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 (31)

1. A surface-treated calcium carbonate material obtained by treating at least one calcium carbonate-containing material 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, to obtain the surface-treated calcium carbonate material.

2. The surface-treated calcium carbonate material according to claim 1 , comprising 97 to 99% by weight of a calcium carbonate material, 0.1 to 3% by weight of monoalcohol primary monoalkanol amine and/or polyethyleneimine salt(s) of C 5 -C 28 fatty acid(s) and 0 to 1.5% by weight of calcium and/or magnesium salt(s) of C 5 -C 28 fatty acid(s).

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

4. The surface-treated calcium carbonate material 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.

5. The surface-treated calcium carbonate material 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.

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

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

8. The surface-treated calcium carbonate material according to claim 1 , wherein the calcium carbonate material has a d 50 value of from 0.4 to 5 μm.

9. The surface-treated calcium carbonate material according to claim 1 , wherein the calcium carbonate material has a d 50 value of from 0.5 to 1 μm.

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

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

12. The surface-treated calcium carbonate material according to claim 1 , wherein the calcium carbonate material is provided in the form of an aqueous suspension.

13. The surface-treated calcium carbonate material 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.

14. The surface-treated calcium carbonate material 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.

15. The surface-treated calcium carbonate material 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.

16. The surface-treated calcium carbonate material 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.

17. The surface-treated calcium carbonate material 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.

18. The surface-treated calcium carbonate material 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).

19. The surface-treated calcium carbonate material 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.

20. The surface-treated calcium carbonate material 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.

21. The surface-treated calcium carbonate material 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.

22. The surface-treated calcium carbonate material 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.

23. The surface-treated calcium carbonate material 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.

24. The surface-treated calcium carbonate material 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.

25. The surface-treated calcium carbonate material 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).

26. The surface-treated calcium carbonate material according to claim 1 , wherein the monoalcohol primary alkanolamine is ethanolamine, propanolamine, butanolamine, pentanolamine or any mixture thereof.

27. The surface-treated calcium carbonate material according to claim 1 , wherein the salt of a C 5 -C 28 fatty acid(s) is a 1-amino-2-propanol salt of a C 5 -C 28 fatty acid.

28. The surface-treated calcium carbonate material according to claim 1 , wherein the calcium carbonate material is treated with a total of 0.1 to 3 wt. % of the salt(s) of the C 5 -C 28 fatty acid(s), based on the dry weight of the calcium carbonate-containing material.

29. The surface-treated calcium carbonate material according to claim 1 , wherein the calcium carbonate material is treated with a total of 0.5 to 2 wt. % of the salt(s) of the C 5 -C 28 fatty acid(s), based on the dry weight of the calcium carbonate-containing material.

30. An aqueous medium comprising the surface-treated calcium carbonate material according to claim 1 for the control of organic material in the aqueous medium.

31. Paper comprising the surface-treated calcium carbonate material according to claim 1 .

Assignments (1)
CHANGE OF NAME Recorded Feb 12, 2015
From: OMYA DEVELOPMENT AG
To: OMYA INTERNATIONAL AG
Reel/Frame 034979/0743 →
Priority Claims (1)
EP 10170110 · Jul 20, 2010 · regional
Continuity (3)
Division 13807940
Provisional Application 61500171 · Jun 23, 2011
Related Publication 20140251564A1 · Sep 11, 2014