Solubility of tricalcium aluminate from 10 °C to 40 °C

The Neutralization of Tricalcium Aluminate Hexahydrate and its Spontaneous Transformation into Friedel's Salt, a Layered Double Hydroxide

“…To estimate the net pH change accompanying this reaction, it is useful to look at the thermodynamic solubility products of C 3 A [22] and C 3 AH 6 [15]. Accordingly, the pH controlled by the dissolution of the respective solid is ~8.8 (C 3 A) and ~ 11.8 (C 3 AH 6 ), respectively, at room temperature.…”

“…In this respect, the solid-state and aquatic chemistry of tricalcium aluminate, Ca 3 Al 2 O 6 or C 3 A (where C = CaO, A = Al 2 O 3 according to the conventional notation) is of particular interest, since it is the most reactive clinker phase upon hydration, amounting to 4-11 % of Portland cement [8,[17][18][19][20][21][22]. C 3 A is also present in alternative formulations, such as calcium sulfoaluminate [23][24][25][26][27] cements, proposed to be a 'greener' alternative to Portland cement due to its lower CO 2 emission, lower sintering temperature, better chemical resistance, faster setting, etc.…”

“…C 2 AH 8 , C 4 AH 13 , and/or C 4 AH 19 [7,[37][38][39][40][41][42], preceding the formation of katoite, C 3 AH 6 [37][38][39][42][43][44][45][46]. The dissolution equilibria of C 3 A as well as C 3 AH 6 have been studied in detail, and corresponding thermodynamic solubility products for both solids have been determined [9,15,22,47].…”

Influence of Process Parameters in Three-Stage Purification of Aluminate Solution and Aluminum Hydroxide

“…In the second phase of this work, the purification of the aluminate solution contin in order to obtain the purest possible product (aluminum hydroxide). Sodium alumi from Phase I was further treated with very fine aluminum hydroxide (seed crystals), ing which iron, zinc, and copper ions were adsorbed on the surface of the solid ph This is an innovative step of this work, which is missing in the literature on purifica of solutions [20][21][22][23][24][25]. Seed crystals were prepared after grinding of water suspension very fine aluminum hydroxide.…”