Detail publikace

Gypsum dehydration to Alpha-gypsum in mixed chloride solutions

DVOŘÁK, K. FRIDRICHOVÁ, M. GAZDIČ, D.

Originální název

Gypsum dehydration to Alpha-gypsum in mixed chloride solutions

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Brno University of Technology solves in the long term the problem of alpha gypsum preparation by dehydrating the gypsum in the solution of chloride salts. This study verified that alpha-gypsum can be trouble free prepared by gypsum dehydration in solution of a number chloride salts, among others CaCl2, MgCl2 or NaCl. In the same time it was found that owing to the different electro-chemical behavior of Potassium ions, the by heat conditioned reaction of gypsum with the KCl solution the dehydration doesnt take place, but a partial substitution of Potassium ions by Calcium ions takes place. The product of this reaction is the mineral görgeyit, K2SO4.5CaSO4.H2O.This important problem was solved by reduction of the extremely electrochemical high mobility of Potassium ions by the method of the mixed chloride solution with Potassium and Sodium ions, the mobility of which is in comparison with the preceding only one third. Samples of hemihydrate in the solution of mixed salts were prepared and tested in conclusion of the research.

Klíčová slova

Alpha gypsum, gorgeyte

Autoři

DVOŘÁK, K.; FRIDRICHOVÁ, M.; GAZDIČ, D.

Rok RIV

2012

Vydáno

24. 1. 2012

Nakladatel

Trans Tech Publications, Switzerland

Místo

ICAMEM 2011

ISSN

1022-6680

Periodikum

Advanced Materials Research

Ročník

457

Číslo

1

Stát

Švýcarská konfederace

Strany od

391

Strany do

394

Strany počet

4

BibTex

@article{BUT88959,
  author="Karel {Dvořák} and Marcela {Fridrichová} and Dominik {Gazdič}",
  title="Gypsum dehydration to Alpha-gypsum in mixed chloride solutions",
  journal="Advanced Materials Research",
  year="2012",
  volume="457",
  number="1",
  pages="391--394",
  issn="1022-6680"
}