Effects of sodium dodecyl benzenesulfonic acid (SDBS) on the morphology and the crystal phase of CaCO3

Abstract

The effects of anionic surfactant on the morphology and crystallization of calcium carbonate precipitated from CaCl 2 and Na 2 CO 3 were investigated. Although reaction temperature did not have an effect on the morphology of calcium carbonate, it did have an effect on the cluster size. The cluster size became bigger with high reaction temperature. With the addition of sodium dodecyl benzenesulfonic acid (SDBS), the morphology of precipitated calcium carbonate changed from cubic to porous spheres with over 98% of the crystal phase transformed from calcite to vaterite. The analysis of precipitates formed by the reaction of CaCl 2 solution (from limestone (CaO 50% content)) and Na 2 CO 3 found that the morphology of precipitated calcium carbonate changed from cubic to spherical, and the crystal phase changed from calcite to over 94% vaterite with the addition of sodium dodecyl benzenesulfonic acid. These vaterite structures were solid spheres rather than hollow ones.

Combined Influence of Meso- and Macroporosity of Soft-Hard Templated Carbon Electrodes on the Performance of Li-O2 Cells with Different Configurations

“…CN-1 and CN-2 CaCO 3 -based microparticles were obtained using two different methods. CN-1 particles were prepared by precipitation of calcium carbonate from equimolar portions of CaCl 2 (99.99% trace metals basis, Sigma Aldrich) and Na 2 CO 3 (≥99.0%, Sigma Aldrich) under stirring in 200 mL in the presence of the anionic surfactant sodium dodecylbenzenesulfonate (1 g L-1, SDBS, technical grade, Sigma Aldrich) following similar procedures as reported by Hwang et al [37]. Briefly, 100 mL of 0.1 mol of NaCO 3 and 0.2 g of SDBS were mixed under stirring at room temperature.…”

Precipitation of Calcium Carbonate in Porous Media in the Presence of n-Dodecane

“…33 Other divalent cations such as Fe 2+ , Mg 2+ , Cu 2+ , and Zn 2+ were proven to impose inhibition on calcite crystal growth, 35,36 probably due to the adsorption of these impurities on the active sites of the growing crystals. The presence of foreign substrates (sodium dodecyl benzenesulfonic acid, SDBS) has also been shown to stabilize vaterite, 37 while in more recent studies 38 particles of nanocalcium-diethylenetriamine penta(methylenephosphonate) (Ca-DTPMP) showed that they were used to delay calcium carbonate scaling in water treatment processes. Heterogeneous nucleation of calcium carbonate has also been shown to take place on a number of polymers including elastin, 39 styrene−butadiene copolymer, 30 sulfonated polysterene or polystyrene divinylbenzene polymers, 40 and cellulose 41 which stabilized different polymorphs or hydrated salts.…”

Preparation of high purity PCC from medium- and low-grade limestones using the strongly acidic cation exchange resin

“…of anion surfactants added during the soda process(CaCl 2 -Na 2 CO 3 system) [15]. Such surfactants form amorphous co-polymorphs resulting in vaterite-type CaCO 3 in the CaCl 2 -Na 2 CO 3 system [19]. FT-IR analyses confirmed that PCC (CaCO 3 -CaCl 2 (1 M) + Na 2 CO 3 (1 M): (a) ultrasonic 30 min, and (b) without ultrasound treatment) was composed of (a) calcite-type CaCO 3 (713, 1,426 cm À1 ), vaterite-type CaCO 3 (745, 878 cm À1 ) and (b) calcitetype CaCO 3 (712, 877, 1,434 cm À1 ) ( Fig.…”

“…These results show that pure CaCO 3 , Ca(OH) 2 and CaO (around 99% purity) can be prepared using SCR (Table 6 and Figs. [18][19][20][21]. Table 5 XRF Analysis of (a) CaCO 3 , (b) Ca(OH) 2 …”