Abstract: Systems, methods, and compositions are provided related to utilizing gypsum for CO2 sequestration to form solid products containing calcium carbonate.

Abstract: An acicular strontium carbonate fine powder having a mean length of 150 nm or less and a mean aspect ratio of 1.5 or more and containing acicular strontium carbonate particles having a length of 200 nm or more in an amount of 5% or less in terms of number of acicular particles is improved in its dispersibility in hydrophobic organic solvent by treating the acicular strontium carbonate fine powder with a combination of polycarboxylic acid having a side chain of a polyoxyalkylene group or its anhydride and amine having a polyoxyalkylene group and a hydrocarbyl group.

Abstract: In a preferred embodiment, the invention relates to a process of sequestering carbon dioxide. The process comprises the steps of: (a) reacting a metal silicate with a caustic alkali-metal hydroxide to produce a hydroxide of the metal formerly contained in the silicate; (b) reacting carbon dioxide with at least one of a caustic alkali-metal hydroxide and an alkali-metal silicate to produce at least one of an alkali-metal carbonate and an alkali-metal bicarbonate; and (c) reacting the metal hydroxide product of step (a) with at least one of the alkali-metal carbonate and the alkali-metal bicarbonate produced in step (b) to produce a carbonate of the metal formerly contained in the metal silicate of step (a).

Abstract: An object of the present invention is to provide a fine crystal particle production method and device that are excellent in mixing efficiency. This object is achieved by a method for producing fine crystal particles, comprising: a swirl flow producing step at which a swirl flow of liquid a comprising reactant A is supplied into a cylinder having a circumferential surface partially or wholly composed of a porous membrane; and a reaction step at which liquid b comprising reactant B which is reactive with the reactant A is supplied through the porous membrane to the swirl flow to effect mixing, whereby the reactants A and B are reacted to precipitate fine crystal particles.

Abstract: To provide a method for producing a carbonate, including: growing seed crystals, wherein the seed crystals are grown in a reaction solution containing at least urea. An aspect in which the seed crystals are strontium carbonate particles, an aspect in which the reaction solution contains a metal ion source and the metal ion source is a hydroxide of strontium, and the like are favorable.

Abstract: An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 ?m, preferably of less than 0.5 ?m, and most preferably of less than 0.3 ?m), wherein such beads are more resistant to wear than conventional beads of the prior art. Another object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. Another object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries.

Abstract: An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 ?m, preferably of less than 0.5 ?m, and most preferably of less than 0.3 ?m), wherein such beads are more resistant to wear than conventional beads of the prior art. Another object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. Another object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries.

Abstract: A calcium carbonate filler for a resin, in which the content rate of particles having a particle diameter of 0.26 ?m or less is 30% or less in a number particle size distribution diameter measured (Mac-VIEW manufactured by Mountech) from an electron micrograph, and which satisfies the following expressions (a) to (c) is provided. Dms5/Dmv5?3??(a) 1?Sw?8 (m2/g)??(b) Mo?300 (ppm)??(c) wherein Dms5: A 5% diameter (?m) accumulated from a small particle side in a volume particle size distribution by a laser diffraction particle size distribution measuring device (MASTERSIZER2000 manufactured by Malvern); Dmv5: A 5% diameter (?m) accumulated from a small particle side in a number particle size distribution in a particle diameter (Mac-VIEW manufactured by Mountech) measured with an electron microscope; Sw: A BET specific surface area (Macsorb manufactured by Mountech) (m2/g); Mo: A water amount (ppm) by the Karl Fischer method at 200 to 300° C.

Abstract: The present invention concerns a method for producing calcium carbonate containing the steps of extraction of alkaline industrial waste or by-products using as a first extraction solvent an aqueous solution of a salt formed from a weak acid and a weak base, whereby a vanadium-enriched first residue is allowed to settle and a calcium-rich first filtrate is formed, filtration, whereby the first filtrate is separated from the first residue, carbonation of the calcium-rich first filtrate using a carbonation gas, whereby calcium carbonate precipitates and a second filtrate is formed, and a second filtration, whereby the calcium carbonate is separated from the second filtrate. Further, the present invention concerns a method for extracting calcium carbonate and vanadium from alkaline industrial waste or by-products.

Abstract: CO2-sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO2-sequestering formed building material.

Abstract: The present invention relates to an economic process for preparing surface-reacted calcium carbonate. The present invention further relates to a surface-reacted calcium carbonate having an increased specific BET surface area, and the use of a process for adjusting the specific BET surface area.

Abstract: New photocatalytic product comprising compounds of titanium integrated with limestone. The product is obtained by reacting limestone with a suitable precursor of titanium dioxide in a basic solution, recovering the product in particular conditions, drying it and calcining it. By operating in presence of sodium, a composite is obtained substantially free from titanium dioxide, containing limestone and calcium titanate. The composite thus obtained, used as such or in mixture with other components, has shown an unexpectedly high photocatalytic activity.

Abstract: A composition which provides enhanced removal of aldehydes from the air of the building interior. The composition includes an amino silane and a multivalent metal carbonate and is especially suitable for adding to building product board substrates, such as acoustical ceiling panels and gypsum wallboards. The composition of the invention can be applied during manufacturing or can be post applied to already constructed room surfaces. The composition provides longevity of aldehyde removal heretofore unachieved.

Abstract: The present invention relates to a method for preparing barium carbonate and the barium carbonate product obtained by the method. The method for preparing barium carbonate comprises: (1) Adding barium hydroxide octahydrate crystal into the ice-water bath and mixing them, and controlling the temperature to be within 0˜5° C.; (2) Introducing carbon dioxide into the mixture obtained from the step (1), till pH value of the reaction solution reaches 6.0-7.0; (3) Carrying out solid-liquid separation for the solid-liquid mixture obtained from the step (2), drying the obtained solid so as to obtain barium carbonate product. The present invention method solves the problem in the prior art that the character of low strontium and the character of large specific surface area can not co-exist, which makes the property of barium carbonate product can not affect the sintering temperature, and thus the property material is improved.

Abstract: An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 ?m, preferably of less than 0.5 ?m, and most preferably of less than 0.3 ?m), wherein such beads are more resistant to wear than conventional beads of the prior art. An other object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. An other object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries.

Abstract: A method for treating calcium carbonate includes combining calcium carbonate with an amount of stearic acid and an amount of water to form a mixture, the amount of water being at least about 0.1% by weight relative to the total weight. The method further includes blending the mixture to form a stearic acid-treated calcium carbonate composition.

Abstract: A color insensitive scattering pigment is disclosed. In an embodiment, the scattering pigment is composed of particles of a range of sizes. In at least one subrange of the range of sizes, the particles are present in such relative proportions that the v/v concentration (volumetric concentration) of a particular size of particles is proportional to the size itself. In an embodiment, such a scattering pigment is included in light guides to scatter light from a primary light source.

Abstract: Methods and systems are provided for producing a carbonate precipitation material comprising stable or reactive vaterite from carbide lime that provides both a source of divalent cations (Ca2+ ions, Mg2+ ions, etc.) and a source of proton removing agent.

Abstract: 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 cm3/g. A specific advantage of this composition is that it as a component in a coating, allows the passage of ink solvent into the base paper while retaining the ink molecules on the surface.

Abstract: Personal lubricants containing royal jelly, a glow powder or xylitol are provided.

Abstract: The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride.

Abstract: The present invention relates to the synthesis of bioceramics, in particular, of amorphous or cryptocrystalline calcium phosphates.

Abstract: The present invention relates to a stabilizer system for halogenated polymers comprising, as component (A), calcium monocarbonatohydroxodialuminate of the formula (A) CamAl2(OH)6+2(m-1)CO3*nH2O??(A), where m=from 3.8 to 4.2, and n=from 0 to 3, and, as component (B), a catena-2,2?,2?-nitrilotrisethanolperchloratolithium or -sodium coordination polymer (B1) with a monomer unit of the formula where Mt=Li or Na, An=OClO3 and q=1, and/or a quaternary or ternary ammonium or phosphonium perchlorate (B2). The present invention further relates to compositions and articles comprising these stabilizer systems, and to the use of the systems and compositions.

Abstract: Systems, methods, and compositions are provided related to utilizing gypsum for CO2 sequestration to form solid products containing calcium carbonate.

Abstract: The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of 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, based upon moles of Ca(OH)2 prior to or during carbonation; 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, 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.

Abstract: Stabilized, spherical, amorphous calcium carbonate particles having a mean particle diameter in the range from 0.05 ?m to 2.0 ?m and a water content of at most 5.0 wt % measured as residual moisture at 200° C., wherein the calcium carbonate particles comprise at least one substance which has a molar mass greater than 100 g/mol and satisfies the formula R—Xn, wherein the radical R represents a radical comprising at least one carbon atom, the radical X represents a group which comprises at least one oxygen atom and at least one carbon atom, sulphur atom, phosphorus atom and/or nitrogen atom and n preferably constitutes a whole number in the range from 1 to 20, the proportion of crystalline calcium carbonate is less than 30 wt %, and the specific surface area of the calcium carbonate particles is at most 20 m2/g.

Abstract: In some embodiments, the invention provides systems and methods for removing carbon dioxide and/or additional components of waste gas streams, comprising contacting the waste gas stream with an aqueous solution, removing carbon dioxide and/or additional components from the waste gas stream, and containing the carbon dioxide and/or additional components, in one form or another, in a composition. In some embodiments, the composition is a precipitation material comprising carbonates, bicarbonates, or carbonates and bicarbonates. In some embodiments, the composition further comprises carbonate and/or bicarbonate co-products resulting from co-processing SOx, NOx, particulate matter, and/or certain metals. Additional waste streams such as liquid, solid, or multiphasic waste streams may be processed as well.

Abstract: The present invention relates to a calcium carbonate having a surface charge, the preparing process thereof and filler for producing a paper using the same. The present invention provides the process of preparing a calcium carbonate having a surface charge, characterized in that it comprises the following steps of: preparing a solution mixture of one or more monomer selected from the group consisting of calcium hydroxide, acrylic acid, acrylamide, or [2-(acryloyloxy)ethyl]-trimethylammonium chloride; removing dissolved gases such as oxygen and carbon dioxide in the said solution by injecting nitrogen (N2) gas; adjusting pH of the said solution; and inducing a reaction by adding polymerization initiator of a high molecule while injecting carbon dioxide to the said mixture.

Abstract: Highly compactable granulations and methods for preparing highly compactable granulations are disclosed. More particularly, highly compactable calcium carbonate granulations are disclosed. The granulations comprise powdered materials such as calcium carbonate that have small median particle sizes. The disclosed granulations are useful in pharmaceutical and nutraceutical tableting and provide smaller tablet sizes upon compression than previously available.

Abstract: Disclosed herein is a method of producing carbonate, comprising the steps of: providing a water-containing solution including cations that are precipitated in the form of a salt after undergoing a precipitation reaction with carbonate ions; and generating carbon dioxide microbubbles having a diameter of 50 ?m or less in the water-containing solution to induce the precipitation reaction between the cations and the carbonate ions. The method is advantageous in that the carbonate produced using the microbubble system disclosed in the method can be practically used as high-priced building materials, filler for paper manufacturing, etc. and can also be used in foods, medicines and the like depending on the purity thereof, so that it can be recovered in a high yield. Further, the method is advantageous in that carbon dioxide is consumed, and cations can be effectively removed from waste water, so that it is environmentally useful.

Abstract: The invention discloses a method of preparing monodisperse microtablets of calcium carbonate in aqueous solutions containing calcium, gelatin and urea. Calcium carbonate powders of a unique tablet-like morphology were produced by simply ageing the prerefrigerated (at 4° C. for at least 24 hours) CaCI2-gelatin-urea solutions at 70° C. for 24 h in ordinary glass media bottles. Thermal decomposition of dissolved urea was used to supply aqueous carbonate (CO32?) ions to the calcium (Ca2+) ion and gelatin-containing solutions. Monodisperse CaCO3 microtablets have the particle sizes from 1 to 8 microns. CaCO3 microtablets were biphasic in nature and consist of 93 to 98% vaterite and 2 to 7% calcite. Identical solutions used without prerefrigeration yielded only trigonal prismatic calcite crystals upon ageing at 70° C. for 24 h.

Abstract: 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 carbon dioxide through the solution so as to form calcium carbonate with a consequential reduction in the pH of the reaction mixture, (iv) during a time period beginning at the start of a sudden, short rise in pH and ended during a subsequent fall in pH but before it reaches 9.5 terminating the dispersion of carbon dioxide and adding an alkaline reagent to maintain a pH for the product mixture of at least 9.5, and (v) recovering precipitated calcium carbonate.

Abstract: To provide an optical resin composition containing carbonate crystals, which have oriented birefringence, have a needle- or rod-like shape, and are able to negate the birefringence without sacrificing the light transmittance of a transparent polymeric resin where the carbonate crystal exists, and a method for producing the resin composition. To achieve this provided are an optical resin composition containing a resin and carbonate crystals, wherein the carbonate crystals have a specific surface area of 4 m2/g or more, and the carbonate crystals dispersed into the resin have an average dispersion diameter of 500 nm at a maximum, and a method for producing the optical resin composition.

Abstract: Provided is a method of producing a paint involving dry-grinding a calcium carbonate in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alkoxy or hydroxy polyalkyleneglycol group.

Abstract: Provided are a method of dry-grinding calcium carbonate in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alkoxy or hydroxy polyalkyleneglycol group, and a method of producing a hydraulic binder base including dry grinding a calcium carbonate in the presence of the grinding aid.

Abstract: The invention resides in the use, as an agent reducing the viscosity of a thermoplastic or thermosetting paste filled with a calcium carbonate, of a calcium carbonate characterized in that it is obtained by dry-grinding, firstly, and in that it is dry-ground in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alcoxy or hydroxy polyalkyleneglycol group, secondly. The invention also concerns the filled thermoplastic and thermosetting pastes obtained in this manner.

Abstract: Highly compactable granulations and methods for preparing highly compactable granulations are disclosed. More particularly, highly compactable calcium carbonate granulations are disclosed. The granulations comprise powdered materials such as calcium carbonate that have small median particle sizes. The disclosed granulations are useful in pharmaceutical and nutraceutical tableting and provide smaller tablet sizes upon compression than previously available.

Abstract: CO2-sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO2-sequestering formed building material.

Abstract: In a method of producing carbonate mineral, a first aqueous solution containing an alkaline earth metal ion extracted from a cation exchange medium by a cation exchange reaction and carbon dioxide are added to a second aqueous solution to form a carbonate mineral.

Abstract: Methods are provided for physically removing all the carbon dioxide from the combustion products of solid, liquid, and gaseous fossil fuels. The combustors operate without excess air to maximize the carbon dioxide at the exhaust, which is compressed with the nitrogen and mixed with pressurized water to dissolve the carbon dioxide in a chamber from which the nitrogen gas is removed. The solution is drained into a second lower pressure chamber from which the carbon dioxide re-evolves as a gas, which is then pressurized for sequestration in limestone formations as calcium bicarbonate. The water is recycled to repeat the separation process, and depressurization of the two gases recovers most of the compression energy.

Abstract: A process for the separation of carbon dioxide from gas mixtures is disclosed in which a metal oxide sorbent, which is used to capture and release carbon dioxide, is recycled. The process incorporates the regeneration of the carbon dioxide capture capacity of the metal oxide to maintain a high capture capacity over many cycles. The regeneration involves hydrating the metal oxide and then heating the resulting metal hydroxide under a gas atmosphere that is effective to suppress the dehydration of the hydroxide so that dehydration occurs at an elevated temperature. The regeneration may also be used independently from the carbon dioxide separation process to produce, from a metal hydroxide, a metal oxide having an enhanced resistance to attrition and fragmentation.

Abstract: The object of the present invention is to provide a carbonate crystal, which has oriented birefringence, is needle- or rod-like, and is able to negate the birefringence without sacrificing the light transmittance of a transparent polymeric resin when it exists in the transparent resin; a manufacturing method of the carbonate crystal; and a transparent optical resin composition comprising the carbonate resin. The carbonate crystal has an aspect ratio of two or greater, the average major axis length of 400 nm or shorter, and the variation coefficient expressed in Formula (1) below is 0.40 or less: 1 r × { 1 n - 1 ? ? i = 1 n ? ( r i - r ) 2 } 1 2 Formula ? ? ( 1 ) wherein r denotes an average major axis length, n denotes the number of particles used for the measurement of the major axis length, and n denotes the major axis length of the ith particle measured.

Abstract: Provided herein are methods and systems including contacting an anode electrolyte with an anode; contacting a cathode electrolyte with a cathode where cathode is a fine mesh cathode; and applying voltage across the anode and the cathode. The methods and systems further may include treating hydroxide ions produced at the cathode with carbon from a source of carbon.

Abstract: The disclosure provides methods and systems for sequestering and/or reducing carbon dioxide present in an industrial effluent fluid stream containing carbon dioxide. A scrubbing material comprising a first component, a second component (distinct from the first component), and preferably water, is contacted with the effluent fluid stream. The first component comprises a source of calcium oxide and a source of alkali metal ions. The second component comprises a slag having one or more reactive silicate compounds. Methods of reducing carbon dioxide from exhaust generated by combustion sources, lime and/or cement kilns, iron and/or steel furnaces, and the like are provided. Carbon dioxide emission abatement systems are also disclosed. Methods of recycling industrial byproducts are further provided.

Abstract: A material with cationic exchanger properties is introduced into aqueous media, where the equilibriums of carbon dioxide dissolution take place. A cationic exchanger material x/nM+nEx? is used to capture hydronium cations (H3O+) according to: x/nM+nEx?(s)+xH3O+(aq)=xH3O+Ex?(s)+x/nM+n(aq) where “x” stands for molar amount of the anionic centers of charge of the cationic exchanger material Ex? balanced by x/n molar amount of metal M, “n” stands for the metal valence, and M is selected from the group consisting of 1A and/or 2A of the periodic table of elements. This capture of the hydronium cations, H3O+, shifts certain reaction equilibriums to the right, according to Le Chatelier's principle, producing more bicarbonate, HCO3?, and/or carbonate, CO3=, than would otherwise be obtained.

Abstract: The present invention relates to compositions and methods for inhibiting metal exposure to tissues.

Abstract: Alkaline earth metal carbonate exhibiting a resistance to acids expressed as pH of less than 7 measured after suspending 1.0 g of the particles in a mixture made of 20 ml of toluene and 80 ml of an aqueous phase consisting of deionized water, 11.76 g/L of citric acid monohydrate, 2.57 g/L of NaCl and 0.068 mol/L of NaOH, after 35 minutes of stirring at 25° C. and at 1 000 rpm, or expressed as a moisture pick-up lower than or equal to 2 g water/kg of calcium carbonate after one week of storage at 22° C. and 50% relative humidity, or as a Differential Scanning Calorimetry (DSC) spectrum showing at least one peak between 170 and 190° C. when measured at a heating rate of 10° C./min under nitrogen atmosphere from 25 to 250° C. in open cells. Process for the preparation of said particles, compositions containing said particles and the use thereof.

Abstract: The present invention relates to a directly compressible magnesium hydroxide carbonate and to a process for the preparation thereof, and to the use thereof.

Abstract: A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour (for example a flue gas or a cement plant flue gas) which process includes contacting the gas with a particulate solid, which solid includes an alkaline earth metal oxide or hydroxide and a promoter selected from an alkanolamine; an unsubstituted or substituted piperazine; an unsubstituted or substituted morpholine; and a polyethyleneamine oligomer.

Abstract: Increasing the activity of a hydrous magnesium silicate with respect to sequestration of carbon dioxide by mineral carbonation includes rapid heating of the hydrous magnesium silicate. Rapid heating of the hydrous magnesium silicate includes heating a quantity of particles of hydrous magnesium silicate with flame conditions to substantially dehydroxylate the particles. The dehydroxylated particles can be contacted with carbon dioxide in a sequestration process to form magnesium carbonate.