The production of precipitated calcium carbonate (PCC) from carbonate-free minerals and CO_2 from industrial exhaust gas could lower energy consumption …

Spherical and ultrafine calcium carbonate powders were prepared from carbide slag which was treated by HCl,and the effect of the parameters,reactant concentration,stirring speed,addition rate,variety and dosage of dispersant on CaCO3 powders were studied by using Color finder,SEM,TEM and XRD in this paper.The Optimum conditions obtained …

To maximise the fi bene ts of calcium carbonate derived from alkaline waste fi carbonation in sustainable cements, we have demonstrated that: (i) different forms of calcium carbonate exhibit ...

Calcium carbonate (precipitated), EMPLURA®; CAS Number: 471-34-1; Synonyms: Calcium carbonate; Linear Formula: CaCO3; find Supelco-193666 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.

Finally, aragonite type precipitated calcium carbonate can be synthesized from natural dolomite via a simple carbonation process, yielding product with average particle size of 30-40 μm.

The influence of spontaneous precipitation reaction parameters such as aging time, pH value, the concentration of complexing agent sodium citrate on the …

Results show that calcium carbonate binders with high compressive strengths of up to 119.5 MPa are prepared via accelerated carbonation of magnesium slag pastes. This is attributed to the formation of calcium carbonates in terms of calcite and vaterite, yielding an enhanced product matrix with dense microstructure and high …

Carbonation is one of the methods for the production of precipitated calcium carbonate (PCC) on the industrial scale. A gaseous CO2 is used as a reagent in this process.

Nano-CaCO3 was prepared from phosphogypsum (PG) through reactive crystallization in the gas (CO2)–liquid (NH3·H2O)–solid (PG) three-phase system. The effects of temperature, CO2 flow rate, and reaction time on the CaCO3 particle size distribution (PSD) were investigated. The results show that PG-derived nano-CaCO3 …

Background: Calcium carbonate (CC) nanoparticles have broad biomedical utilizations, owing to their multiple intrinsic merits. However, bare CC nanoparticles do not allow for the development of multifunctional devices suitable for advanced drug delivery in cancer therapy.

Abstract— The development of bioplastic composites from various natural polymers reinforced with Precipitated Calcium Carbonate (PCC) has become a field of increasing interest.

Precipitated calcium carbonate, or PCC, is a synthetic calcium carbonate product. It is derived from, and possesses, the same chemical formula (CaCO3) as natural calcium carbonate (limestone), but is chemically purer than natural limestone.

The factors for the preparation of calcium carbonate and the effects of different conditions on the crystal phase, grain size, and morphology of calcium carbonate were systematically studied. The results showed that the nanosized calcium carbonate was prepared at 60 mL/min, 25 °C, no additional ammonia, and 60 min.

A green-reaction assisted synthesis using a natural occurring dolomite is reported for precipitated calcium carbonate production over aloe barbadensis miller extract template under ambient condition. Uniform, hierarchical aragonite precipitated calcium carbonate stacked from nanoparticles was synthesized.

Calcium carbonate (CaCO3) is the most widely used filler material in paper, paint, plastic, food, ceramic, cosmetic, medicine and other industries. In the present paper, precipitated calcium carbonate (PCC) has been produced from waste marble powder (WMP) by the Calcination-DissolutionPrecipitation (CDP) method. Calcination, dissolution and …

This paper aims at studying the production of calcium carbonate via a carbonation route that can also be considered an efficient utilization of carbon dioxide. A Synthetic Solvay wastewater sample has been prepared and carbonated for the manufacture of nano-precipitated calcium carbonate.

The efficiency of mineral carbonation, either direct or indirect, is dictated by the dissolution of minerals and the precipitation of carbonates and silica. The precipitation of calcium carbonate can be controlled to produce various polymorphs and morphology, enabling its utilization for the enhancement of profitability and environmental benefits.

Preparation of nano-sized precipitated calcium carbonate for PVC plastisol rheology modification

Calcium carbonate superfine powder with high purity was prepared from calcium carbide residue by a liquid phase process using ammonium chloride as extraction agent and ammonium carbonate agent. The effects of some factors on the reaction were investigated. The calcium carbonate was characterized by X-ray powder diffraction …

Calcium carbonate (CaCO 3 ), as an economically feasible and abundant precursor, has been used in calcium source for the HAp synthesis.

A preliminary study on the preparation of conductive nanosized calcium carbonate (CNCC) from the HA-NCC was implemented.

The use of precipitated calcium carbonate fillers is the recommended choice in enhancing optical properties, durability, smoothness and ink adsorption in papermaking and improving the …

The advantage of CaCl 2 is very easily dissolved in water to generate calcium ions and react with the carbonate source to form a solid precipitate of calcium carbonate due to an exothermic process [ 27 ]. However, governing the crystal growth in the exothermic process is quite difficult without controlling the temperature.

In this work, preparation conditions have been studied for suspensions of precipitated calcium carbonate (PCC) particles by means of a 2 k Factorial Experimental Design (DOE), with three center points, and as a function of PCC particle shape.

Calcium carbonate (CaCO3) is the most widely used filler material in paper, paint, plastic, food, ceramic, cosmetic, medicine and other industries. In the present paper, …

The production of precipitated calcium carbonate (PCC) from carbonate-free minerals and CO2 from industrial exhaust gas could lower energy consumption and promote CO2 sequestration. The present study proposes a chemical looping process for the production of PCC from …

Erdogan and Eken (2017) have also produced precipitated calcium carbonate from waste marble powder by calcinationdissolution …

Enzyme-induced calcium carbonate precipitation (EICP) techniques are used in several disciplines and for a wide range of applications. In the oil and gas industry, EICP is a relatively new technique and is actively …

A novel technology based on the combination of supercritical carbon dioxide (scCO 2) and ultrasonic agitation is described here for the preparation of high-yield …

In addition, calcium carbonate is widely utilized for numerous applications, such as pigment and filler in paper production, paint and sealant composite, pharmaceutical and rubber industries. Synthetic (precipitated) calcium carbonate can be identified as precipitated calcium carbonate (PCC).