WORKING OUT THE METHOD OF OBTAINING SORBTION-ACTIVE MATERIALS ON THE BASIS OF NANOPOROUS ZEOLITE IN EXTRACTIVE PHOSPHORIC ACID

Zeolite from Shankanaj deposit, according to its physico-chemical properties defined earlier, is perfectly suitable for the research as a nanostructural sample and also as a sorbent with possibilities of nanoparticles introduction. A perspective direction is reception of ion exchange materials with an unlimited matrix on the basis of natural mineral raw materials for creation of new nanomaterials. In this direction the syntheses of effective sorption-active materials with nano-size particles in an active phase are developed by methods of mechanical and chemical activation with carbonate of sodium.A perspective direction is reception of ion exchange materials with an unlimited matrix on the basis of natural mineral raw materials for creation of new nanomaterials.

There is an opinion¹ that pores of 2 nanometers in size and less can be received only in two kinds of materials: on the basis of carbon and in zeolites. In this direction the syntheses of effective sorption-active materials with nano-size particles in an active phase are developed by methods of mechanical² and chemical³ activation with carbonate of sodium. In some of the works^4,5 the way of synthesis of zeolite containing nanostructural Zn-catalysts with application on matrix (AlOH)₃ has been developed. There is the work⁶ which studied ion exchange properties of natural zeolite-clinoptilolite modified by titanium hidroxophosphate.

PLANNED RESEARCH

Working out of zeolite modifying methods for the purpose of obtaining absorbents which would be effective in sorption processes: chemical activation (by 1M solutions of sodium carbonate) of zeolite, and mixtures of zeolite and bentonite in ratio (7:3). Research of sorption properties of the natural and modified zeolite and bentonite on modelling systems "H₃PO₄ - Fe²⁺, Al³⁺, Cu ^{2 +}, Pb ^{2 +}, H₂O" depending from various conditions of sorption process (sorbent: phosphoric acid ratio and durations of purification process). The chemical (photocolorimetric method), IR-spectroscopic, X-ray methods and also local zond microanalysis with the use of a scanning electronic microscope will be used.

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