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Reaktion von Kaolinit mit Kaliumhydroxid
Author(s) -
Sticher H.,
Bach R.
Publication year - 1969
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19690520221
Subject(s) - chemistry , aluminosilicate , potassium hydroxide , potassium , kaolinite , induction period , amorphous solid , hydroxide , nuclear chemistry , inorganic chemistry , mineralogy , organic chemistry , catalysis
The reaction of kaolinite with potassium hydroxide (1 to 9N) was investigated between 70 and 90°C. During a first period of the reaction the content of Si and Al in solution increased and reached a maximum in 100 to 240 minutes, depending on KOH concentration and temperature; then an amorphous aluminosilicate gel formed. After an induction period, again depending on KOH concentration and temperature, the concentrations of Si and Al decreased rapidly, due to the formation of a crystalline potassium aluminosilicate.