公开(公告)号：US10351474B2

公开(公告)日：2019-07-16

申请号：US14897304

申请日：2014-09-15

Applicant: S.A. Lhoist Recherche et Developpement

Inventor： Marion Lorgouilloux ,  Marc Pelletier ,  Robert Sebastian Gartner ,  Thierry Chopin

IPC: C04B18/02 ,  C01F5/24 ,  C01F11/18 ,  C04B28/02 ,  C04B14/26 ,  C04B111/28 ,  E04B1/74

Abstract: Process for preparing a mineral composition based on a mixed solid phase of calcium and magnesium carbonates, comprising a preparation, in an aqueous phase, of a suspension of a solid phase containing at least one calcium compound selected from calcium hydroxide, calcium carbonate and mixtures thereof and at least one magnesium compound selected from magnesium oxide, magnesium hydroxide, at least partially hydrated dolomite, and mixtures thereof, the weight of said solid phase being between 5% and 15% of the total weight of the suspension, a carbonation of said solid phase in suspension by injecting a gas containing CO2 into said suspension that is heated at a temperature of 55° C. to 90° C., at a flow rate of CO2 of 2.5 to 15 dm3/min/kg of said solid phase of the suspension, with a reduction of the pH of the suspension to a value of less than 9 and with a stabilization of the electrical conductivity of the suspension, the carbonation being stopped as soon as this stabilization of electrical conductivity is observed.

公开(公告)号：US10344168B2

公开(公告)日：2019-07-09

申请号：US15030422

申请日：2014-10-30

Applicant: Omya International AG

Inventor： Michael Pohl ,  Christian Rainer

IPC: C08K3/26 ,  C09C1/02 ,  C01F11/18 ,  C04B14/28

Abstract: The present invention relates to a process for the preparation of an aqueous suspension comprising at least one calcium carbonate-containing material. The invention further relates to calcium carbonate-containing material having a ratio of particles having an average particle size d80 value to particles having an average particle size d20 value [d80/d20] of ≤2.50 and the use of the calcium carbonate-containing material in paper and board applications, in cosmetics, in caulks and sealants, in paints and coatings, or in plastics applications.

公开(公告)号：US10343929B2

公开(公告)日：2019-07-09

申请号：US15417578

申请日：2017-01-27

Applicant: Omya International AG

Inventor： Marc Maurer ,  Thomas Schlotterbach ,  Mathieu Skrzypczak ,  Robert Pirker

IPC: C01F11/18 ,  C09C1/02

Abstract: The present invention provides a process for preparing a precipitated calcium carbonate product comprising the steps of: (a) preparing an aqueous suspension of precipitated calcium carbonate seeds by carbonating a suspension of Ca(OH)2 in the presence of 0.005 to 0.030 moles of Sr, in the form of Sr(OH)2, per mole of Ca(OH)2, (b) dewatering and dispersing the precipitated calcium carbonate seeds prepared in step (a) to obtain an aqueous suspension of precipitated calcium carbonate seeds having a d50 of less than or equal to 0.1 to 0.3 μm and a BET specific surface area of 10 to 30 m2/g, and (c) forming an aqueous suspension of a precipitated calcium carbonate product by carbonating a slurry of Ca(OH)2 in the presence of 0.5 to 5% by dry weight of the precipitated calcium carbonate seeds obtained in step (b), wherein the precipitated calcium carbonate seeds have a d50 that is less than the d50 of the precipitated calcium carbonate product and the precipitated calcium carbonate seeds have an aragonitic polymorph content greater than or equal to the precipitated calcium carbonate product obtained in step (c) characterized in that the dewatering of step (b) is carried out by the use of a tube press.

公开(公告)号：US10336888B2

公开(公告)日：2019-07-02

申请号：US15548564

申请日：2016-03-18

Applicant: MARUO CALCIUM CO., LTD.

Inventor： Ryoji Utsumi ,  Shigeru Sakaguchi ,  Takaaki Nishioka

IPC: C08K9/04 ,  C09C3/08 ,  C09C1/02 ,  C09J11/06 ,  C08K5/56 ,  C09J201/10 ,  C09K3/10 ,  C08L101/10 ,  C08K3/26 ,  C09J11/04 ,  C01F11/18

Abstract: Provided are a surface-treated calcium carbonate filler useful in a curable resin, for imparting performance having excellent heat resistance, color fastness, strength and elongation, and a curable resin containing the filler.A surface-treated calcium carbonate filler for a curable resin composition, in which calcium carbonate synthesized using compact limestone is treated by a surface treatment agent, the surface-treated calcium carbonate filler satisfying the following formulae (1) to (4): 0≤Mg≤2000,  (1) 0≤Fe≤200,  (2) 70≤SFa≤100, and  (3) 0≤Ufa≤30,  (4) Mg: a proportion [ppm] of magnesium contained in surface-treated calcium carbonate, Fe: a proportion [ppm] of iron contained in surface-treated calcium carbonate, SFa: a proportion [wt %] of saturated fatty acid in the surface treatment agent comprising a water-soluble monovalent salt of a fatty acid, and UFa: a proportion [wt %] of unsaturated fatty acid in the surface treatment agent comprising a water-soluble monovalent salt of a fatty acid.

公开(公告)号：US20190135650A1

公开(公告)日：2019-05-09

申请号：US16095467

申请日：2017-04-21

Applicant: Imerys USA, Inc.

Inventor： Virendra SINGH ,  Christopher PAYNTER ,  David GITTINS ,  Dickey SHURLING ,  Douglas WICKS ,  Janet PRESTON ,  Andrew FINDLAY

IPC: C01F11/18 ,  C09D5/00 ,  C09D11/033 ,  C09D11/037 ,  C09D11/08 ,  C09D11/105 ,  D21H19/38 ,  D21H21/52

Abstract: Inorganic particulate compositions containing inorganic particles associated with a copolymer of a hydrophilic monomer and a hydrophobic monomer associated with the inorganic particles are provided. The particulate composition satisfies at least one of the following properties: a BET surface area of the inorganic particles is greater than 8 m2/g, a Hegman value of the inorganic particles is 75 microns or less, and a rate of water loss from the composition upon drying from a moisture level greater than 2% wt % is at least 30% greater than a composition having a corresponding content of a polyacrylate polymer associated with the particles. A method to prepare the composition and formulations for inks, paints, coatings and filled polymeric articles containing the inorganic particulate composition are also provided.

公开(公告)号：US10273162B2

公开(公告)日：2019-04-30

申请号：US14925637

申请日：2015-10-28

Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES

Inventor： Seung-Woo Lee ,  Soo-Chun Chae ,  Chi-Wan Jeon

IPC: C01F11/18 ,  B32B9/00

Abstract: A method of coating a calcium carbonate film. In one aspect, the method includes preparing a calcium aqueous solution by adding a calcium-containing material to distilled water; forming a calcium carbonate film on a surface of the calcium aqueous solution by leaving the calcium aqueous solution; placing the calcium carbonate film on a substrate; and forming a calcium carbonate coating film by leaving the calcium carbonate film on the substrate.

公开(公告)号：US10259945B2

公开(公告)日：2019-04-16

申请号：US15088215

申请日：2016-04-01

Applicant: FP-Pigments Oy

Inventor： Mikko Maijala ,  Roope Maijala

IPC: C09C1/36 ,  C09D11/037 ,  B82Y30/00 ,  C01F11/18 ,  C08K3/26 ,  C09C1/00 ,  C09C1/02 ,  C09D17/00 ,  D21H17/67 ,  D21H19/38 ,  C08K3/22 ,  C09D7/61 ,  C09D7/40

Abstract: A pigment particle composition which comprises calcium carbonate particles and pigment particles, its method of manufacture and its use. According to the present invention, the calcium carbonate particles are carbonated so that they bind to each other, in which case calcium carbonate structures are generated, which comprise pigment particles and which form essentially opaque and stable pigment-calcium carbonate aggregates. It is possible to manufacture the composition by atomizing calcium hydroxide-bearing pigment slurry into a carbon dioxide-bearing gas, in which case the calcium hydroxide is carbonated in order to precipitate the calcium hydroxide particles to be attached to each other and the carbonation is continued until essentially all of the calcium hydroxide has been converted into calcium carbonate. The composition is suitable for use, among others, in paints, coating materials, fillers, polymers and printing inks.

公开(公告)号：US20190063000A1

公开(公告)日：2019-02-28

申请号：US16076976

申请日：2017-02-10

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Teija Laukala

IPC: D21H17/67 ,  C01F11/18

Abstract: The present invention relates to crystalline and stable amorphous CaCO3 precipitated on lignocellulosic fibers.

公开(公告)号：US10203434B2

公开(公告)日：2019-02-12

申请号：US14214129

申请日：2014-03-14

Applicant: Blue Planet, Ltd.

Inventor： Brent R. Constantz ,  Chris Camire ,  Seung-Hee Kang

IPC: B32B13/04 ,  G02B5/08 ,  C01F11/18 ,  C01F5/24 ,  E04D7/00 ,  C04B26/26 ,  C04B28/02 ,  E04D13/16 ,  C09C1/02 ,  C04B111/00

Abstract: Compositions comprising highly reflective microcrystalline/amorphous materials are provided. In some instances, the highly reflective materials are microcrystalline or amorphous carbonate materials, which may include calcium and/or magnesium carbonate. In some instances, the materials are CO2 sequestering materials. Also provided are methods of making and using the compositions, e.g., to increase the albedo of a surface, to mitigate urban heat island effects, etc.

公开(公告)号：US10150079B2

公开(公告)日：2018-12-11

申请号：US15221716

申请日：2016-07-28

Applicant: Institut National de la Recherche Scientifique

Inventor： Guy Mercier ,  Jean-Francois Blais ,  Emmanuelle Cecchi ,  Sanoopkumar Puthiya Veetil ,  Louis-Cesar Pasquier ,  Sandra Kentish

IPC: C01F11/18 ,  B01D53/62 ,  C01F5/24 ,  B01D53/78 ,  B01D53/80 ,  B01D53/81

Abstract: Techniques are described for chemical sequestration of carbon dioxide and production of precipitated magnesium carbonate. The process can include contacting carbon dioxide from industrial emissions with water and magnesium-containing particulate material, such as serpentinite, which is thermally pre-treated and has a particle size of at most 75 microns. The process can also include separation of the loaded aqueous stream from the solids, followed by precipitation of magnesium carbonate material that includes carbon and oxygen from industrial emissions and magnesium from serpentinite or chrysotile mining residue, for example.