Calcium Hydroxide Chlorides: The Ternary System Ca(OH)2‐CaCl2‐H2O at 25, 40, and 60 °C, Phase Stoichiometry and Crystal Structure. Issue 10 (9th May 2019)

• Record Type: Journal Article
• Authors: Häusler, Felix; Schmidt, Horst; Freyer, Daniela
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 645:Issue 10(2019)
• Page Start: 723
• Page End: 731
• Publication Date: 2019-05-09
• Subjects: Calcium hydroxide chlorides -- Schreinemakers' method -- Ternary system; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201900051
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : The formation of calcium hydroxide chlorides is an important issue in processes of the chemical raw materials industry, in terms of purification of flue gases, and concrete/cement corrosion. Current information on phase compositions given in the literature are contradictory. In this work systematic solubility studies were carried out at 25, 40, and 60 °C in the system Ca(OH)2 ‐CaCl2 ‐H2 O and the compositions of the ternary solid phases were precisely determined using the Schreinemakers' method. Two ternary phases were identified, the hydrate 3Ca(OH)2 · CaCl2 · 12H2 O and the anhydrous calcium hydroxide chloride Ca(OH)2 · CaCl2 . The crystal structure of 3Ca(OH)2 · CaCl2 · 12H2 O was solved by means of single‐crystal X‐ray diffraction at –123 °C (150 K). Abstract :