Method of processing zirconium concentrate
Usage: in the production technology of pure compounds of zirconium and silicon. The essence of the invention: the zircon concentrate is treated at 400-550 ° C with gaseous elemental fluorine in an amount in excess of 20-30 May% in excess of the stoichiometric required. In this case, gaseous silicon tetrafluoride is obtained and, in the residue, solid …
SU1186233A1
one . A sorbent for extracting transition metal ions from solutions and chromatography on the basis of silica with grafting nitrogen-containing acid groups, characterized in that, in order to increase the selectivity of the sorbent, it contains grafted hydroxamic acid groups of the formula CH2CH2C
Charge for producing fluorinated glass
SU1204588A1 SU843783572A SU3783572A SU1204588A1 SU 1204588 A1 SU1204588 A1 SU 1204588A1 SU 843783572 A SU843783572 A SU 843783572A SU 3783572 A SU3783572 A SU 3783572A SU 1204588 A1 SU1204588 A1 SU 1204588A1 Authority SU USSR - Soviet Union Prior art keywords glass fluoride fluorides earth charge Prior art …