Process for transforming hydrargillite into by laboratory

摘要

P of hydro-thermal conversion of the boehmite hydrargilitte which consists in to prepare a suspension of hydrargilitte in water at a rate of 150gl and 700gl of material expressed in alo, the heat treatment under pressure at a temperature ranging between 200c and 270c, the rate of rise in temperature of the said suspension because of at least 1cminute, and at the end stay for a time comprised between 1minute and 60minutes in a zone of stay at a temperature lying in the interval 200c has 270c. / p & & p & the boehmite obtained has a particle size at most identical to that of the initial hydrargilitte and is very poor in elements. / p