INVESTIGATING CHRYSOTILE ASBESTOS WASTE AS A POTENTIAL MATERIAL FOR SYNTHETIC ADSORBENTS

Abstract

Technological methods have been developed to acquire an active component with a high SiO₂ content, which serves as a matrix foundation for synthetic adsorbents made from chrysotile asbestos production waste composite materials. Comparative analyses were conducted between the obtained adsorbent and a zeolite adsorbent of the NaX model. The physico-chemical analyses unveiled that the synthetic adsorbent obtained is not inferior in any aspect, and in certain instances, even outperforms in the demetallization process of heavy petroleum raw materials.

The demetallization process exhibits an optimal temperature range of 380-410 °C, with a contact time of 60 minutes and a pressure range of 8-10 atm. Concurrently, the concentration of vanadium in heavy crude oil decreases significantly from 540 to 28 micrograms per kilogram, while nickel content diminishes from 50 to 26 micrograms per kilogram. Moreover, iron content experiences a reduction from 50 to 12 micrograms per kilogram, and sulfur content decreases from 3.50 % to 2.39 %.