Characterization of a technological sample of special clay useful in the cuban oil sector
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Abstract
Two technological clay samples of the paligorskite-sepiolite special group were characterized, one of which is marketed under the name of attapulgite and Cuban paligorskite from the "Pontezuela" deposit, a Cuban deposit located in the province of Camagüey as a possible substitute of the first and subsequent use in the drying / purification of aviation turbo fuel (JET - A1). With this objective, different combined instrumental techniques of instrumental analysis were applied for the characterization of phases and determination of physical-chemical properties: powder diffractometry (XRD), Thermal Analysis, Fourier Transform Infrared Spectroscopy (FTIR), Electron Microscopy and Sortometry, respectively. The results of the characterization show that both clays correspond to the same mineralogical group of paligorskite-sepiolite, mixtures of two different crystalline systems coexist in both: orthorhombic and monoclinic, noting that in the case of imported clay the monoclinic variety predominates and the orthorhombic is appreciated in lesser proportion, while in that of "Pontezuela", the orthorhombic constitutes the most common variety, all in accordance with the differences that can be seen between the intensities of the diffraction maxima: d(Å)= 6.38 - 6.33; d(Å)= 5.39 - 5.38 and Miller indices (200) and (130) correspondingly. The effectiveness of Cuban clay for the aforementioned application it was demonstrated through a combination of results and the tests carried out at the "Camilo Cienfuegos" Cuban Refinery, with the consequent savings in foreign exchange due to import substitution.
Finally, this article serves as a tribute to the memory of Ing. Alberto Cavado Osorio, a CEINPET specialist to oil refining who has since passed away.
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