EP2646512A1 - Utilisation de sels alcalins de carbonate pour reduire la dose de polymere acrylique dans un procede de broyage de carbonate de calcium dans l'eau - Google Patents
Utilisation de sels alcalins de carbonate pour reduire la dose de polymere acrylique dans un procede de broyage de carbonate de calcium dans l'eauInfo
- Publication number
- EP2646512A1 EP2646512A1 EP11799476.4A EP11799476A EP2646512A1 EP 2646512 A1 EP2646512 A1 EP 2646512A1 EP 11799476 A EP11799476 A EP 11799476A EP 2646512 A1 EP2646512 A1 EP 2646512A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- acrylic acid
- homopolymer
- soluble copolymer
- mixtures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/021—Calcium carbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/185—After-treatment, e.g. grinding, purification, conversion of crystal morphology
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
Definitions
- the present invention relates to a method of manufacturing an aqueous suspension of calcium carbonate by grinding in an aqueous medium by introducing alkali metal salts of carbonate in said aqueous suspension of calcium carbonate.
- alkali metal salts of carbonate make it possible to reduce the amount of grinding aid agents used, which are homopolymers or copolymers of acrylic acid, for an equivalent level of performance in rheology and granulometry of the suspensions.
- These polyacrylates contribute significantly to enrich the atmosphere with carbon dioxide and are derived from raw materials from fossil fuels: by limiting their quantity, we preserve the environment as well as our natural resources.
- alkaline carbonate salts are introduced during grinding as a mixture with the polyacrylate and / or introduced during grinding in parallel with the polyacrylate.
- the aqueous formulations resulting from the mixing of the salts and the polyacrylate constitute another object of the present invention, as well as their manufacturing process.
- the use of these alkaline salts is a final object of the present invention, as an additive to reduce the amount of acrylic grinding aid agent implemented.
- the mineral industry is a big consumer of chemicals. These are used in the various stages of transformation / modification / treatment that the mineral materials undergo. Thus, in the case of calcium carbonate of natural or synthetic origin, many operations known as “grinding” (reduction of the particle size of the particles) are carried out in a dry state or in an aqueous medium, or “dispersion” (implementation of suspending the particles in a liquid).
- the present invention relates to grinding processes which implement grinding aid agents.
- hydrosulfide homopolymers of acrylic acid are effective agents in aiding the dispersion or grinding of calcium carbonate in an aqueous medium.
- acrylic acid with another carboxylic monomer, such as itaconic acid, methacrylic acid, or sulfonic acid such as acrylamido-2-methyl-2-propane sulfonic acid or maleic anhydride, and / or with another ethylenically unsaturated monomer but without carboxylic function, such as an acrylic ester: these variants are also described in the previous documents.
- carboxylic monomer such as itaconic acid, methacrylic acid, or sulfonic acid such as acrylamido-2-methyl-2-propane sulfonic acid or maleic anhydride
- Patent FR 2 514 746 describes a method known as "Fractionation" for adjusting the polymolecularity index by selecting polymer chains having a given length, depending on the application chosen for the agent concerned.
- the Applicant has developed a method of manufacturing an aqueous suspension of calcium carbonate by grinding in water with at least one horriopolymer and / or at least one water-soluble copolymer of acrylic acid. with introduction of at least one alkaline carbonate salt into said suspension.
- a very advantageous way we show that we succeed in reducing the amount of polyacrylate used, while maintaining or improving a number of properties related to the rheology and the particle size of the suspension (see the examples supporting the present Application). It is known that during the grinding operation, the concentration of calcium ions increases in the aqueous phase due to the fragmentation of the individual particles of calcium carbonate.
- the Applicant intends to point out that the alkali metal carbonate salts used according to the invention have no direct action on the grinding of calcium carbonate: they are not grinding aid agents within the meaning of the definition. given at the beginning of this Request.
- these salts do not alter the characteristics of the carbonate obtained after grinding compared to a ground carbonate with the same grinding aid agent but without the salt (it is however necessary to increase the dose of grinding agent to obtain the same granulometric and rheological characteristics for the final suspension). These characteristics essentially mean the usual optical properties of a calcium carbonate, such as its whiteness and opacity.
- a first object of the invention consists in a process for manufacturing an aqueous suspension of calcium carbonate by grinding in water with at least one homopolymer and / or at least one water-soluble copolymer of acrylic acid, with introducing at least one alkaline carbonate salt into said suspension.
- this process is characterized in that said salt is introduced integrally in the form of a mixture in water with at least one homopolymer and / or at least one water-soluble copolymer of acrylic acid and with possibly at least one another additive selected from a biocide and / or antifoam.
- said mixing is carried out before the grinding operation of the calcium carbonate. It is this mixture which is then introduced into the corresponding mill.
- this process is characterized in that said salt is introduced integrally and distinctly from the homopolymer and / or the water-soluble copolymer of acrylic acid, in the aqueous suspension of calcium carbonate, before and / or during and or after the introduction of said acrylic polymer.
- the polyacrylate and the alkali carbonate salt are introduced directly and distinctly into the aqueous suspension of calcium carbonate to be ground.
- this process is characterized in that said salt is introduced:
- This variant corresponds to a combination of the two previous ones.
- this process is also characterized in that the alkaline salt is chosen from sodium, potassium and lithium salts, and mixtures thereof, preferably from sodium, potassium and their mixtures (lithium constituting a relatively expensive compound ).
- this process is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid have a molecular weight of between 3,000 g / mol and 15,000 g / mol, preferably between 4,000 g / mol and 10,000 g / mol. This molecular weight is determined throughout the present Application by the method described in the part reserved for the examples.
- This process is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid are totally or partially neutralized, preferably completely neutralized by a neutralization agent chosen from hydroxides of sodium, potassium, oxides and hydroxides of calcium, magnesium, ammonia and mixtures thereof, preferentially with sodium hydroxide.
- a neutralization agent chosen from hydroxides of sodium, potassium, oxides and hydroxides of calcium, magnesium, ammonia and mixtures thereof, preferentially with sodium hydroxide.
- the water-soluble copolymer of acrylic acid is a water-soluble copolymer of acrylic acid with another monomer chosen from methacrylic acid, crotonic acid, isocrotonic acid, cinnamic acid, maleic acid, itaconic acid and acrylamido-2-methyl acid. -2-propane sulfonic acid and mixtures thereof.
- This process is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid are obtained by radical polymerization processes in solution, in direct or inverse emulsion, in suspension or precipitation in appropriate solvents, in the presence of catalytic and transfer agents, or by controlled radical polymerization processes and preferably by controlled polymerization with nitroxides (NMP) or by cobaloxymes, radical atom transfer polymerization (ATRP), controlled radical polymerization by sulfur derivatives, selected from carbamates, dithioesters or trithiocarbonates (RAFT) or xanthates.
- radical polymerization processes in solution, in direct or inverse emulsion, in suspension or precipitation in appropriate solvents, in the presence of catalytic and transfer agents, or by controlled radical polymerization processes and preferably by controlled polymerization with nitroxides (NMP) or by cobaloxymes, radical atom transfer polymerization (ATRP), controlled radical polymerization by sulfur derivatives, selected from carbamates, dithioesters
- This method is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid are, before or after their neutralization, treated and separated into several phases, according to static or dynamic processes, with one or more polar solvents preferentially belonging to the group consisting of methanol, ethanol, propanol, isopropanol, butanols, acetone, tetrahydrofuran or mixtures thereof.
- a second object of the present invention is the use of at least one alkaline carbonate salt in a process for producing an aqueous suspension of calcium carbonate by grinding in water with at least one homopolymer and / or at least one less a water-soluble copolymer of acrylic acid, having the function of reducing the amount of acrylic polymer used.
- acrylic polymer refers to the homopolymer and / or copolymer mentioned above.
- the amount of the acrylic polymer refers to the amount of dry polymer engaged relative to the dry weight of calcium carbonate used. The reduction of this amount is carried out, with respect to the same amount of polymer used but without alkaline carbonate salts, without altering the viscosity and the particle size of the resulting suspension.
- a third subject of the present invention consists of an aqueous composition containing water, at least one homopolymer and / or at least one water-soluble copolymer of acrylic acid and at least one alkaline carbonate salt.
- This aqueous composition may also contain at least one other additive chosen from a biocide and / or an antifoam.
- this aqueous composition is also characterized in that the alkaline salt is chosen from sodium, potassium and lithium salts, and mixtures thereof, preferably from sodium, potassium and mixtures thereof.
- This aqueous composition is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid have a molecular weight of between 3,000 g / mol and 15,000 g / mol, preferably between 4,000 g / mol and 10,000 g. / mol.
- This aqueous composition is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid are totally or partially neutralized, preferably completely neutralized, with a neutralization agent chosen from hydroxides of sodium, potassium, oxides and hydroxides. calcium, magnesium, ammonia and mixtures thereof, preferably with sodium hydroxide.
- a neutralization agent chosen from hydroxides of sodium, potassium, oxides and hydroxides. calcium, magnesium, ammonia and mixtures thereof, preferably with sodium hydroxide.
- the water-soluble copolymer of acrylic acid is a water-soluble copolymer of acrylic acid with another monomer chosen from methacrylic, crotonic, isocrotonic, cinnamic, maleic, itaconic and acrylamido-2- acids. 2-methylpropanesulfonic acid and mixtures thereof.
- This aqueous composition is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid are obtained by radical polymerization processes in solution, in direct or inverse emulsion, in suspension or precipitation in appropriate solvents, in the presence of catalytic systems and transfer agents, or by controlled radical polymerization processes and preferably by controlled polymerization with nitroxides (NMP) or by cobaloxymes, radical atom transfer polymerization (ATRP), radical polymerization controlled by sulfur derivatives, selected from carbamates, dithioesters or trithiocarbonates (RAFT) or xanthates.
- radical polymerization processes in solution, in direct or inverse emulsion, in suspension or precipitation in appropriate solvents, in the presence of catalytic systems and transfer agents, or by controlled radical polymerization processes and preferably by controlled polymerization with nitroxides (NMP) or by cobaloxymes, radical atom transfer polymerization (ATRP), radical polymerization controlled by sulfur derivatives, selected from carbamates
- This aqueous composition is also characterized in that the homopolymer and the water-soluble copolymer of acrylic acid are, before or after their neutralization, treated and separated into several phases, according to static or dynamic processes, by one or more polar solvents belonging to preferentially to the group consisting of methanol, ethanol, propanol, isopropanol, butanols, acetone, tetrahydrofuran or their mixtures.
- a third and last object of the present invention consists in a process for manufacturing an aqueous composition, by introduction with stirring at a temperature of between 10 ° C. and 90 ° C., preferably between 30 ° C. and 60 ° C. at least one carbonate salt in the form of a powder in an aqueous solution of at least one homopolymer and / or a water-soluble copolymer of acrylic acid having an initial solids content of between 10% and 60%, preferably between % and 50%, and optionally by addition of at least one other additive selected from a biocide and / or an antifoam.
- the particle size characteristics relating to calcium carbonate are determined from a Sedigraph TM 5100 device, sold by MICROMERITICS TM.
- a test portion of the polymer solution corresponding to 90 mg of dry matter is introduced into a 10 ml flask.
- Mobile phase supplemented with 0.04% DMF, is added to a total mass of 10 g.
- the composition of this mobile phase is as follows: NaHCO 3: 0.05 mol / L, NaNO 3: 0.1 mol / L, triethanolamine: 0.02 mol / L, NaN 3 0.03% by weight.
- the CES chain is composed of a Waters TM 510 type isocratic pump, the flow rate of which is set to 0.8 mL / min, a Waters 717+ sample changer, an oven containing a precolumn type "Guard Column Ultrahydrogel Waters TM", followed by a linear column type "Ultrahydrogel Waters TM” 30 cm long and 7.8 mm inside diameter.
- the detection is ensured by a Waters TM 410 differential refractometer.
- the oven is heated to a temperature of 60 ° C, and the refractometer is heated to a temperature of 45 ° C.
- the CES is calibrated with a series of sodium polyacrylate standards supplied by Polymer Standard Service with a peak molecular weight between 2000 and 1.10 6 g / mol and a polymolecularity index between 1.4 and 1.7. as well as with a sodium polyacrylate with a molecular weight of 5,600 g / mol and a polymolecularity index of 2,4.
- the calibration curve is of linear type and takes into account the correction obtained thanks to the flow rate marker (DMF). Acquisition and processing of the chromatogram is performed using the PSS WinGPC Scientific v 4.02 software. The chromatogram obtained is integrated in the zone corresponding to molecular weights greater than 65 g / mol.
- This example illustrates the manufacture of different mixtures of polyacrylates with alkaline carbonate salts.
- This example illustrates the use of different polyacrylate / alkali carbonate carbonate mixtures in a grinding process in an aqueous medium of calcium carbonate.
- the operation of grinding the mineral substance to be refined consists in grinding the mineral substance with a grinding body in very fine particles in an aqueous medium containing the grinding aid agent.
- the actual grinding operation is carried out using a DYNO ® - MILL type KDL - Pilot A equipment containing the grinding body of particle size advantageously between 0.20 and 4 millimeters.
- the grinding body is generally in the form of particles of materials as diverse as silicon oxide, aluminum oxide, zirconium oxide or mixtures thereof, as well as synthetic resins of high hardness, steels, or others.
- An example of a composition of such grinding bodies is given by the patent FR 2 303 681 which describes grinding elements formed from 30% to 70% by weight of zirconium oxide, 0.1% to 5% aluminum oxide and 5 to 20% of silicon oxide.
- the grinding body is preferably used in an amount such that the ratio by weight between this grinding material and the mineral substance to be ground is at least 2/1, this ratio preferably being between the limits 3/1 and 5 / 1.
- aqueous suspension of calcium carbonate begins by preparing an aqueous suspension of calcium carbonate to be milled by introducing with stirring water, the mixture containing the dispersant and an additive, and then calcium carbonate. After stirring for 20 minutes, this suspension is introduced into the grinding chamber containing the grinding body. This is set in motion by means of rotating blades. By successive passages the mineral suspension is then subjected to the mechanical action of crushing and attrition.
- the grinding chamber is equipped with a double cooling jacket in order to maintain the grinding temperature in a temperature range between 60 and 80 ° C as well as a pressure indicator.
- the continuous milling operation is maintained until a pressure rise in the mill of 0.5 bar is observed.
- the crushed suspension is then removed and characterized.
- Brookfield TM viscosity is determined at 100 rpm and at 25 ° C. at the outlet of the mill ( ⁇ in mPa.s): this datum makes it possible to quantify the fluidity of the suspension obtained.
- the proportion by weight of particles whose diameter is less than 2 ⁇ is also determined with Sedigraph TM 5100 from Micromeritics TM: the fineness of the grains of carbonate obtained after grinding is thus evaluated.
- This test illustrates the prior art and uses 2250 ppm of a water-soluble homopolymer of acrylic acid completely neutralized with sodium hydroxide and with a molecular weight of 5,500 g / mol.
- This test illustrates the invention and uses 2500 ppm of the mixture manufactured according to test la of Example 1.
- 2250 ppm of a water-soluble homopolymer of acrylic acid completely neutralized with hydroxide is used. of sodium and molecular weight equal to 5,500 g / mol, and 250 ppm of sodium carbonate.
- This test illustrates the invention and uses 2500 ppm of the mixture manufactured according to test 1a of Example 1.
- 2125 ppm of a water-soluble homopolymer of acrylic acid completely neutralized with hydroxide is used.
- of sodium and molecular weight equal to 5,500 g / mol, and 375 ppm of sodium carbonate.
- This test illustrates the invention and uses 2500 ppm of the mixture manufactured according to test 2a of Example 1.
- 2250 ppm of a water-soluble homopolymer of acrylic acid completely neutralized with hydroxide is used. of sodium and molecular weight equal to 5,500 g / mol, and 250 ppm of potassium carbonate.
- This test illustrates the invention and uses 2500 ppm of a mixture of a water-soluble homopolymer of acrylic acid completely neutralized with sodium hydroxide and with a molecular weight of 5 500 g / mol (2125 ppm), and potassium carbonate (375 ppm). This mixture was prepared according to the procedure of Example 1. Test No. 6
- This test illustrates a field outside the invention and implements a mixture between the acrylic polymer (2250 ppm) of test No. 1 and sodium silicate (250 ppm). This The mixture was prepared in the same manner as the mixture used in Test No. 2.
- Test No. 8 This test illustrates a field outside the invention and implements a mixture between the acrylic polymer (2250 ppm) of test No. 1 and sodium gluconate (250 ppm). This mixture was prepared in the same manner as the mixture used in Test No. 2. Test No. 8
- Test No. 9 This test illustrates a field outside the invention and implements a mixture between the acrylic polymer (2250 ppm) of test No. 1 and urea (250 ppm). This mixture was prepared in the same way as the mixture used in Test No. 2. Test No. 9
- Test No. 10 This test illustrates a field outside the invention and implements a mixture between the acrylic polymer (2250 ppm) of test No. 1 and glucose (250 ppm). This mixture was prepared in the same way as the mixture used in Test No. 2. Test No. 10
- Test No. 1 1 This test illustrates a field outside the invention and uses a mixture between the acrylic polymer (2250 ppm) of test No. 1 and glycerol (250 ppm). This mixture was prepared in the same manner as the mixture used in Test No. 2. Test No. 1 1
- This test illustrates a field outside the invention and uses a mixture between the acrylic polymer (2250 ppm) of test No. 1 and of sodium acetate (250 ppm). This mixture was prepared in the same way as the mixture used in test No. 2.
- This test illustrates a field outside the invention and implements a mixture between the acrylic polymer (2125 ppm) of test No. 1 and sodium silicate (375 ppm). This The mixture was prepared in the same manner as the mixture used in Test No. 3.
- This test illustrates a field outside the invention and implements a mixture between the acrylic polymer (2125 ppm) of test No. 1 and glucose (375 ppm). This mixture was prepared in the same manner as the mixture used in test No. 3.
- test No. 1 By comparing test No. 1 according to the prior art with tests No. 2 and 4 according to the invention (same dose of acrylic polymer), it is shown all the advantages of using sodium or potassium carbonate: the proportion of particles whose diameter is less than 2 ⁇ is increased, while substantially decreasing the viscosity at the outlet of the mill. There is therefore a more fluid aqueous suspension with finer particles.
- n ° 6 to 1 1 which implements the same quantity of additives as for the tests n ° 2 and 4 (namely 250 ppm) makes it possible to obtain a degree of finesse comparable: one obtains at better 60.2% by weight of particles with a diameter less than 2 ⁇ , this percentage being systematically at least equal to 62% in the case of tests No. 2 and 4.
- This example illustrates the use of different polyacrylate / alkali carbonate carbonate mixtures in a grinding process in an aqueous medium of calcium carbonate.
- Example 2 starting from 3 aqueous suspensions obtained in Example 2 (according to tests No. 1, 2 and 4) whose fineness is sought to improve by continuing the grinding in the presence of a homopolymer of acrylic acid, half of which The carboxylic acid is neutralized with sodium hydroxide and the other half with calcium hydroxide and with a molecular weight of 5,500 g / mol.
- the corresponding tests are denoted 1 bis, 2 bis and 4 bis.
- the grinding is continued until a suspension of calcium carbonate is obtained, 80% by weight of the particles of which have a diameter of less than 1 ⁇ .
- Brookfield TM viscosity at 100 rpm and at 25 ° C., is then measured at the outlet of the mill ( ⁇ in mPa.s), as is the demand for acrylic grinding aid agent implemented during this process.
- second milling step (ABr in ppm).
- This example illustrates the separate introduction of acrylic polymer and salts in an aqueous grinding process of calcium carbonate.
- This test illustrates the invention and uses 2250 ppm of the abovementioned acrylic polymer, and 250 ppm of sodium carbonate.
- This test illustrates a field outside the invention and uses 2250 ppm of the abovementioned acrylic polymer, and 250 ppm of sodium sulfate.
- This test illustrates a field outside the invention and uses 2250 ppm of the abovementioned acrylic polymer and 250 ppm of sodium chloride.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1060012A FR2968219B1 (fr) | 2010-12-02 | 2010-12-02 | Utilisation de sels alcalins de carbonate pour reduire la dose de polymere acrylique dans un procede de broyage de carbonate de calcium dans l'eau. |
PCT/IB2011/002645 WO2012073080A1 (fr) | 2010-12-02 | 2011-11-03 | Utilisation de sels alcalins de carbonate pour reduire la dose de polymere acrylique dans un procede de broyage de carbonate de calcium dans l'eau |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2646512A1 true EP2646512A1 (fr) | 2013-10-09 |
Family
ID=43836877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11799476.4A Withdrawn EP2646512A1 (fr) | 2010-12-02 | 2011-11-03 | Utilisation de sels alcalins de carbonate pour reduire la dose de polymere acrylique dans un procede de broyage de carbonate de calcium dans l'eau |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120142842A1 (fr) |
EP (1) | EP2646512A1 (fr) |
CN (1) | CN103221489B (fr) |
BR (1) | BR112013009289A2 (fr) |
FR (1) | FR2968219B1 (fr) |
WO (1) | WO2012073080A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SI2292701T1 (sl) * | 2009-07-01 | 2014-01-31 | Omya International Ag | Postopek za izboljšanje opacitete |
WO2017034871A1 (fr) | 2015-08-21 | 2017-03-02 | G&P Holding, Inc. | Itaconates et polyitaconates d'argent et de cuivre |
US11014858B2 (en) | 2016-03-30 | 2021-05-25 | Gcp Applied Technologies Inc. | Mineral grinding |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0127388B1 (fr) * | 1983-05-20 | 1986-12-30 | Ciba Specialty Chemicals Water Treatments Limited | Polymères solubles dans l'eau |
US5647902A (en) * | 1995-10-20 | 1997-07-15 | Ecc International Inc. | Stabilized calcium carbonate composition using sodium carbonate and mixtures of acids and uses therefor |
FR2895686B1 (fr) * | 2005-12-30 | 2008-05-30 | Coatex Sas | Utilisation d'agents de co-broyage dans un procede de fabrication de carbonates de calcium naturel et precipite co-broyes, suspensions et pigments secs obtenus et leurs utilisations |
SI2143688T1 (sl) * | 2008-07-07 | 2016-12-30 | Omya International Ag | Postopek za pripravo vodne suspenzije kalcijevega karbonata in pridobljena suspenzija, kakor tudi postopek za njeno uporabo |
-
2010
- 2010-12-02 FR FR1060012A patent/FR2968219B1/fr not_active Expired - Fee Related
-
2011
- 2011-11-03 WO PCT/IB2011/002645 patent/WO2012073080A1/fr unknown
- 2011-11-03 BR BR112013009289A patent/BR112013009289A2/pt not_active IP Right Cessation
- 2011-11-03 CN CN201180056227.2A patent/CN103221489B/zh not_active Expired - Fee Related
- 2011-11-03 EP EP11799476.4A patent/EP2646512A1/fr not_active Withdrawn
- 2011-11-18 US US13/299,413 patent/US20120142842A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2012073080A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012073080A1 (fr) | 2012-06-07 |
US20120142842A1 (en) | 2012-06-07 |
FR2968219A1 (fr) | 2012-06-08 |
FR2968219B1 (fr) | 2012-12-14 |
CN103221489A (zh) | 2013-07-24 |
CN103221489B (zh) | 2015-03-18 |
BR112013009289A2 (pt) | 2016-07-19 |
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