Journal ArticleDOI
Solubility of anhydrite in several aqueous salt solutions between 250.degree. and 325.degree.
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The solubility of anhydrite in several aqueous salt solutions has been determined for temperatures between 250/sup 0/ and 325/sup 1/C and at pressures just above the vapor pressure as discussed by the authors.Abstract:
The solubility of anhydrite in several aqueous salt solutions has been determined for temperatures between 250/sup 0/ and 325/sup 0/C and at pressures just above the vapor pressure. The data obtained are intended to be of practical interest in connection with scale precipitation in field heaters during wet steam or hot water injection for thermal oil recovery. The salt solution used contained such electrolytes as sodium chloride, sodium nitrate, calcium chloride, magnesium chloride, sodium sulfate, and magnesium nitrate. Solubility data are determined for a number of binary, ternary, and quarternary systems. (25 refs.)read more
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The prediction of mineral solubilities in natural waters: A chemical equilibrium model for the Na-Ca-Cl-SO4-H2O system, to high temperature and concentration
TL;DR: In this article, a chemical equilibrium model for the Na-Ca-Cl-SO4-H2O system is described, which calculates solubilities from 25°C to 250°C and from zero to high concentration (I ~ 18.6 m) within experimental uncertainty.
Journal ArticleDOI
Modelling of calcium sulphate solubility in concentrated multi-component sulphate solutions
TL;DR: In this article, the chemistry of several calcium sulphate systems was successfully modelled in multi-component acid-containing sulphate solutions using the mixed solvent electrolyte (MSE) model for calculating the mean activity coefficients of the electrolyte species.
Journal ArticleDOI
Mechanism and kinetics of gypsum–anhydrite transformation in aqueous electrolyte solutions
TL;DR: In this article, the transformation of gypsum into anhydrite at low temperatures under atmospheric pressure as well as at elevated temperatures inside an autoclave was investigated by monitoring changes in both the liquid and solid phases.
Journal ArticleDOI
Development of an MSE-based chemical model for the solubility of calcium sulphate in mixed chloride–sulphate solutions
TL;DR: In this paper, a mixed-solvent electrolyte (MSE) model to describe the chemistry of calcium sulphate in aqueous multi-component sulphate solutions has been extended to complex mixed chloride-sulphate solutions.
Journal ArticleDOI
The solubility of gypsum and anhydrite in simulated laterite pressure acid leach solutions up to 250 °C
TL;DR: In this paper, a theoretical and experimental investigation of the solubility of gypsum and anhydrite in simulated laterite pressure acid leach (PAL) solutions was conducted in the temperature range of 25-250°C.
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