Preparation and application of silica sol-gels based on nepheline

This paper reports on the results of investigations into the development of the methods employed for acid treatment of nepheline and the search for new directions in the use of products obtained in the nepheline processing, which have made it possible to design and implement technologies for producing the aluminum-silicon coagulant/flocculant for water purification, as well as technologies for fabrication and application of nepheline-based silicon-containing thickening agents intended for the simplest water-containing explosives of the “Akvatol” type and others.     

Pyrolysis of coconut shells for the manufacture of carbon sorbents

Data on the effect of coconut shell pyrolysis conditions on the yield and properties of pyrolysis products and the results of pilot tests are considered. Coconut shells from Tra Vinh province (Vietnam) were used for the experiments.     

Preparation and characterization of anion exchangers from petroleum asphaltites

The chloromethylation reaction of an asphaltite and styrene graft copolymer followed by the amination of the chloromethylated products was optimized. New strongly basic anion exchangers with an exchange capacity of 2.5 mg-equiv/g and a mechanical strength of 93% were prepared.