Patent application number | Description | Published |
20100133195 | SURFACE-REACTED CALCIUM CARBONATE IN COMBINATION WITH HYDROPHOBIC ADSORBENT FOR WATER TREATMENT - The present invention relates to a process for reducing the amount of organic components in water, wherein a surface-reacted naturalcalcium carbonate and a hydrophobic adsorbent, selected from the group consisting of talc, hydrophobised calcium carbonate, hydrophobised bentonite, hydrophobised kaolinite, hydrophobised glass, or any mixture thereof, are brought into contact with the water to be purified, the surface-reacted natural calcium carbonate being the reaction product of a naturalcalcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or supplied externally, and the surface-reacted natural calcium carbonate being prepared as an aqueous suspension having a pH of greater than 6.0, measured at 20° C. | 06-03-2010 |
20100135886 | Treatment of Talc in a Solvent - The present invention is directed to a process for the treatment of talc, comprising the steps of (a) providing a talc having a first brightness value B1, measured according to ISO 2469, and forming a suspension of the talc in a liquid phase, the liquid phase of the suspension comprising at least one organic solvent, (b) delaminating and/or reducing the weight median particle size d | 06-03-2010 |
20120097069 | METHOD FOR IMPROVING OPACITY - The present invention relates to a process for preparing an aqueous suspension of dispersed calcium carbonate, wherein the resulting coating of said suspension provides opaque properties or has a specific light scattering coefficient S. The invention further relates to compositions of such suspensions of dispersed calcium carbonate and to its use in the field of paper coatings and paper mass fillings as well as paints and plastic coatings. | 04-26-2012 |
Patent application number | Description | Published |
20100258258 | USE OF A SURFACE-REACTED CALCIUM CARBONATE IN TISSUE PAPER, PROCESS TO PREPARE A TISSUE PAPER PRODUCT OF IMPROVED SOFTNESS, AND RESULTING IMPROVED SOFTNESS TISSUE PAPER PRODUCTS - The present invention relates to the use of a surface-reacted natural calcium carbonate as filler in tissue paper products, to a process to prepare tissue paper products, and to a tissue paper product featuring an improved softness, wherein said surface-reacted natural calcium carbonate is the reaction product of a natural calcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or supplied externally. | 10-14-2010 |
20110097311 | COMPOSITION HAVING BIOCIDE ACTIVITY FOR AQUEOUS PREPARATIONS - The present invention refers to a process for bacterial stabilizing aqueous preparations like e.g. calcium carbonate slurries and a composition which can be used for the biocidal treatment of such aqueous preparations. | 04-28-2011 |
20110146931 | COMPOSITIONS OF CALCIUM CARBONATES/PIGMENTS FOR PAPER FORMULATIONS, SHOWING PRINT THROUGH REDUCTION - The present invention relates to mixtures of two distinct porous, stable aggregates and rather coarse PCCs (precipitated) calcium carbonate pigments (such as a composition comprising a blend or mix of one of the two Grade B or Grade C PCCs, in combination with a second, specific S-PCC (S=scalenohedral type PCC) pigment in a ratio appropriately selected between 90/10 and 10/90 percent by dry weight, namely 80/20 and 20/80, with a coarser, third component, which may be a pigment and/or a filler such as natural calcium (ground) carbonate or (most preferably) a PCC (precipitated calcium carbonate), depending on the granulometry of the two fine PCCs the third, coarser component, may be omitted. The main criteria for selecting the said “coarser” pigment is that it should feature a granulometry which does no affect noticeably, when in admixture with the blend PCC Grade B (or PCC Grade C) with S-PCC the finest part of the granulometry data of the blend, and in particular that it should not contribute anything significant to the amount of particles <0.2 μm, preferably nothing <0.3 μm, more preferably nothing <0.5 μm and most preferably nothing <1 μm. | 06-23-2011 |
20110158890 | PROCESS TO PREPARE PRECIPITATED CALCIUM CARBONATE IMPLEMENTING LOW CHARGE ACRYLATE A/O MALEINATE-CONTAINING POLYMER - Process to prepare a precipitated calcium carbonate (PCC) comprising the following steps: (i) providing CaO, which is optionally partially or fully slaked (hereafter “calcium source”); ({umlaut over (ν)}) providing a CO | 06-30-2011 |
20120031576 | Use Of A Surface-Reacted Calcium Carbonate In Tissue Paper, Process To Prepare A Tissue Paper Product Of Improved Softness, And Resulting Improved Softness Tissue Paper Products - The present invention related to the use of a surface-reacted natural calcium carbonate as filler in tissue paper products, to a process to prepare tissue paper products, and to a tissue paper product featuring an improved softness, wherein said surface-reacted natural calcium carbonate is the reaction product of a natural calcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or supplied externally. | 02-09-2012 |
20120186492 | PROCESS TO PREPARE A SURFACE-REACTED CALCIUM CARBONATE IMPLEMENTING A WEAK ACID, RESULTING PRODUCT AND USES THEREOF - The present application relates to a process for preparing a surface-reacted calcium carbonate in an aqueous environment. The process according to the present invention aims at avoiding the mandatory implementation of medium-strong to strong acids. Another aspect of the present invention is directed to an aqueous suspension of surface-reacted calcium carbonate which is obtainable by the inventive process. | 07-26-2012 |
20120256140 | USE OF 2-AMINO-2-METHYL-1-PROPANOL AS ADDITIVE IN AQUEOUS SUSPENSIONS OF CALCIUM CARBONATE COMPRISING MATERIALS - Use of 2-amino-2-methyl-1-propanol (AMP) as an additive in an aqueous suspension, containing from 25 to 62 vol. % of at least one calcium carbonate-comprising material and having a pH of between 8.5 and 11, to increase the suspension pH by at least 0.3 pH units, the AMP being added to said suspension in an amount of from 500 to 15000 mg per litre of the aqueous phase of the suspension, wherein the suspension conductivity change is maintained to within 100 μS/cm/pH unit. | 10-11-2012 |
20130123369 | COMPOSITION HAVING BIOCIDE ACTIVITY FOR AQUEOUS PREPARATIONS - The present invention refers to a process for bacterial stabilizing aqueous preparations like e.g. calcium carbonate slurries and a composition which can be used for the biocidal treatment of such aqueous preparations. | 05-16-2013 |
20130251921 | MINERAL COMPOSITION, ESPECIALLY FOR USE IN PAPER FILLERS AND PAPER OR PLASTIC COATINGS - A mineral composition comprising mineral particles, said mineral particles, when in a densely compacted bed form, having a volume defined median pore diameter from 0.01 to 0.04 micrometre, and having an intruded total specific void volume of 0.1-0.3 cm | 09-26-2013 |