Precipitated Calcium Carbonate Manufacturing Process Patents
US6251356B1 - High speed manufacturing process for ...
A process for the production of precipitated calcium carbonate. A slurry of calcium hydroxide is agitated in a pressurized reactor, and carbon dioxide is provided under pressure to the reactor to produce precipitated calcium carbonate at a high reaction rate. Carbon dioxide is utilized at a high efficiency. Solubilized calcium ions and carbonate ions react to produce a calcium carbonate ...
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Process to obtain precipitated calcium carbonate - Patent ...
2010-4-1 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; and (b) forming an aqueous suspension of the precipitated calcium carbonate product by ...
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EP2632855A1 - Production of high purity precipitated ...
The present invention relates to a process for the preparation of precipitated calcium carbonate comprising the steps of a) providing and calcining calcium carbonate comprising material; b) slaking the reaction product obtained from step a) with an aqueous ammonium chloride solution; c) separating insoluble components from the calcium chloride solution obtained from step b); d) carbonating the ...
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WO2017013323A1 - Production of precipitated calcium ...
The present invention relates to the use of a solution of depolymerised carboxylated cellulose for preparing an aqueous solution of precipitated calcium carbonate (PCC) by slaking a material containing calcium oxide in water and then by carbonating the limewater thus obtained, said depolymerised carboxylated cellulose solution having a solids content of 25 wt % to 40 wt % relative to the total ...
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KR20160147281A - Production of precipitated calcium ...
The present invention relates to a process for the preparation of an aqueous suspension of precipitated calcium carbonate, which comprises mixing water, a calcium oxide-containing material, at least one water-soluble polymer having a molecular weight (M w ) in the range of 200 to 6500 g / mol and at least one digesting additive To produce a lime oil, followed by carbonation of the lime oil to ...
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Process for production of rhombic shaped precipitated ...
A process for producing rhombic or barrel shaped precipitated calcium carbonate. Quicklime is slaked in an aqueous solution containing about 0.1% to about 2% by weight of a sugar, based upon the weight of the CaCO 3 to be produced. Carbon dioxide is added to the slaked lime slurry at a preferred temperature of about 50° F.-70° F. until the pH drops from about 11-12 to about 7-8.
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Process for production of PCC - Omya Development AG
The invention claimed is: 1. A process for production of precipitated calcium carbonate by carbonation of calcium hydroxide, comprising performing in two or more separate reaction vessels the steps of: i) contacting calcium hydroxide with a gas comprising carbon dioxide to allow formation of calcium carbonate in a first reaction vessel, and then ii) transferring a part of the calcium hydroxide ...
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Precipitated calcium carbonate - ECC International Limited
1994-8-9 (c) separating the precipitated calcium carbonate formed in step (b) from the aqueous medium in which it is suspended. There is added 0.1% to 2% by weight, based on the weight of dry calcium oxide, of a reagent having one or more active hydrogen atoms (or a salt thereof), to the aqueous medium in which the quicklime is slaked in step (a).
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EP2483203A1 - Production of calcium carbonate - Google
A method of producing calcium carbonate from lime comprises the steps of: (i) providing an aqueous solution comprising 10% to 35% by weight of dissolved polyhydroxy compound and 1% to 5% by weight of dissolved calcium hydroxide (expressed as Ca(OH) 2 ) and having a pH of at least 11.5; (ii) treating the solution prepared in step (i) to remove solids including suspended solids; (iii) dispersing ...
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Precisely sized precipitated calcium carbonate (PCC ...
Precipitated calcium carbonate crystals of selected crystal habit. A pressure carbonation process is used to manufacture precipitated calcium carbonate. A slurry of calcium hydroxide is agitated in a pressurized reactor, and carbon dioxide is provided to a reactor to produce calcium ions and carbonate ions that react under pressure to produce precipitated calcium carbonate at a high reaction rate.
MoreProcess for production of rhombic shaped precipitated ...
A process for producing rhombic or barrel shaped precipitated calcium carbonate. Quicklime is slaked in an aqueous solution containing about 0.1% to about 2% by weight of a sugar, based upon the weight of the CaCO 3 to be produced. Carbon dioxide is added to the slaked lime slurry at a preferred temperature of about 50° F.-70° F. until the pH drops from about 11-12 to about 7-8.
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Process for obtaining precipitated calcium carbonate ...
2010-4-1 Process for obtaining precipitated calcium carbonate. This web page summarizes information in PubChem about patent PT-2371766-E. This includes chemicals mentioned, as reported by PubChem contributors, as well as other content, such as title, abstract, and International Patent Classification (IPC) codes. To read more about how this page was ...
MoreProcess for production of PCC - Omya Development AG
The invention claimed is: 1. A process for production of precipitated calcium carbonate by carbonation of calcium hydroxide, comprising performing in two or more separate reaction vessels the steps of: i) contacting calcium hydroxide with a gas comprising carbon dioxide to allow formation of calcium carbonate in a first reaction vessel, and then ii) transferring a part of the calcium hydroxide ...
MorePrecipitated calcium carbonate - ECC International Limited
1994-8-9 (c) separating the precipitated calcium carbonate formed in step (b) from the aqueous medium in which it is suspended. There is added 0.1% to 2% by weight, based on the weight of dry calcium oxide, of a reagent having one or more active hydrogen atoms (or a salt thereof), to the aqueous medium in which the quicklime is slaked in step (a).
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PRECIPITATED CALCIUM CARBONATE, A METHOD FOR ITS ...
Dry precipitated calcium carbonate can also be used for the manufacture of plastisols and sealants. When high opacity is sought, such as in paints which dry to give matt or silk (i.e. mid-sheen) finishes, zinc sulphide and, most often, titanium dioxide are used as opacifiers, as disclosed in EP0634463.
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Nano-PCC - Synthesis , Technology, Applications, Patent ...
2012-1-31 Precipitated Calcium Carbonates (PCCs) are manufactured or synthesized calcium carbonates, which can be prepared in many different crystal sizes and shapes. A special category of PCC is the ultrafine PCC, or as it is now more commonly known, the nano PCC.
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(PDF) Precipitated Calcium carbonate production,
2021-11-16 The calcium carbonate was synthesized with the temperatures of 65, 100, 150, 200 and 234°C. The eggshell powder size was 29, 50, 80, 110, and 130 μm. The volume of water to mass of eggshell ...
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Industry - ssipl.xyz
Industry. Precipitated Calcium Carbonate is widely used by Paint Industries for the manufacturing of Emulsion Paint and Powder Coatings. With its high whiteness and ideal distribution, Precipitated Calcium Carbonate improves the processability characteristics of paint. Precipitated Calcium Carbonate is an anti setting agent and also an ...
MorePrecisely sized precipitated calcium carbonate (PCC ...
Precipitated calcium carbonate crystals of selected crystal habit. A pressure carbonation process is used to manufacture precipitated calcium carbonate. A slurry of calcium hydroxide is agitated in a pressurized reactor, and carbon dioxide is provided to a reactor to produce calcium ions and carbonate ions that react under pressure to produce precipitated calcium carbonate at a high reaction rate.
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PROCESS FOR PREPARING SCALENOHEDRAL
2015-10-2 The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing slaking quick lime to obtain slaked lime; and subjecting the slaked lime, without agitation, without prior cooling in a heat exchanger, and in the absence of any additives, to carbonation with carbon dioxide gas to produce PCC.
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Production of precipitated calcium carbonate from calcium ...
2005-11-1 Production of precipitated calcium carbonatePrecipitated calcium carbonate can currently be produced by three different processes: a lime soda process, a calcium chloride process and a carbonation process. In the lime soda process, calcium hydroxide is reacted with sodium carbonate to produce a sodium hydroxide solution, from which the calcium ...
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PRECIPITATED CALCIUM CARBONATE PRODUCTION,
2016-12-27 Precipitated calcium carbonate production, synthesis and properties 59 al. (2008) and Lim et al. (2010) have investigated mineral carbonation with carbon dioxide gas. Teir et al. (2007) investigated dissolution properties of steelmaking slags in acetic acid for precipitated calcium carbonate production. Effect of limestone
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Patents Assigned to Omya International AG - Justia
2017-2-13 Justia - Patents - Patents and Patent Application Resources. Abstract: The present invention refers to the use of a surface-treated calcium carbonate-comprising material and/or magnesium carbonate-comprising material as oxygen scavenger; wherein the surface treatment agent is selected from the group consisting of ascorbic acid and/or salts thereof, gallic acid and/or salts thereof,
Moressipl.xyz - Industry
Precipitated Calcium Carbonate has always been in great demand because of being valuable filler in many industries. Saurashtra Solid Industries Pvt. Ltd. is capable of matching requirement of any industry; we even offer customized grades as per the requirements of customers
MoreIndustry - ssipl.xyz
Industry. Precipitated Calcium Carbonate is widely used by Paint Industries for the manufacturing of Emulsion Paint and Powder Coatings. With its high whiteness and ideal distribution, Precipitated Calcium Carbonate improves the processability characteristics of paint. Precipitated Calcium Carbonate is an anti setting agent and also an ...
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A breakthrough technique for the preparation of high
2010-4-1 1.. IntroductionParticulate calcium carbonate (CaCO 3), and, particularly, calcite, is extensively used as a pigment, filler or extender in the industries of paper, paint, textile, detergents, adhesives, rubber and plastics, food, cosmetics and biomaterials , , , , .At present, the overall demand for CaCO 3 particles is foreseen to be of ca. 10 7 tons by 2010 .
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US Patent for Electrolytic purification of calcium ...
1999-6-30 The calcium carbonate is also suitable for use in papermaking process as fillers, or coatings, or as additives in the production of plastics, paints and adhesive products. Other uses of high purity calcium carbonate include catalysts and catalyst supports, electrical/semiconductor applications, florescent lighting, and optical/laser applications.
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OmyaWeb Production
Whether ground calcium carbonate (GCC) or synthetically precipitated calcium carbonate (PCC), Omya pigments always originate from the earth. This is why Omya has secured the purest and brightest ore bodies and exploits them with the highest sustainability standards while respecting the environment – both now and for the future. If the raw material is not a perfect fit for the customer's ...
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