TY  - BOOK
AU  - Suárez Barrios,M.
AU  - Flores González,L.V.
AU  - Vicente Rodriguez,M.A.
AU  - Martin Pozas,J.M.
TI  - Acid activation of a palygorskite with HCl: Development of physico-chemical, textural and surface properties
N2  - A palygorskite from Bercimuel (Segovia, Spain)was treated with 1.0,3.0,5.0 and 7.0 N solutions of HCl for 1 hour under reflux. The solids obtained were characterized by XRD, FT-IR spectroscopy, thermal <analyses, TEM and nitrogen adsorption-desorption isotherms at 77 K. The acid treatment runs with the removal of the octahedral cations -Mg( II), Al( III)-and the formation of amorphous silica from the tetrahedral sheet. An important increase in the specific surface area was observed during treatment, reaching a maximum of 286 m2/g in the sample treated with 5.0 N HCl. The silica obtained after the treatments maintains the fibrous morphology of natural palygorskite. No creation of microporosity is observed during the treatment
UR  - https://drive.google.com/file/d/14DekS813eH19C-9P-49w1vZhEqT_2rqC/view?usp=drivesdk
ER  -