Reference

Distribution of europium, antimony, and bismuth traces during the extraction of niobium and tantalum from fluoride-sulfate solutions

Distribution of europium, antimony, and bismuth traces during the extraction of niobium and tantalum from fluoride-sulfate solutions. Maiorov, V. G.; Balabanov, Yu. I.; Babkin, A. G.; Duboshin, G. N.; Kopkov, V. K. (USSR). Fiz.-Khim. Osn. Redkomet. Syr'ya, 108-11. Edited by: Kamenskaya, L. A. Akad. Nauk SSSR, Kol'sk. Fil.: Apatity, USSR. (Russian) 1983. CODEN: 50OUAR. DOCUMENT TYPE: Conference CA Section: 54 (Extractive Metallurgy) The partition of Eu, Bi, and Sb impurities was investigated during liq.-liq. extn. of Nb and Ta with cyclohexanone [108-94-1], tri-Bu phosphate [126-73-8], or naphtha sulfoxides. Radiotracers 152Eu, 207Bi, and 125Sb were used in the initial fluoride-sulfte aq. solns. contg. 0.0001-0.006% controlled impurities. Extn. complexes were possibly HSbF4, HSbF6, BiF3, and HBiF4 which promoted high recovery of Sb and Bi in comparison with Eu.Except for chemicals metioned above, 7440-53-1 and 7440-25-7 are also used. .

Recovery of reactive solvents

Recovery of reactive solvents. (Mitsubishi Heavy Industries, Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58183798 A2 27 Oct 1983 Showa, 8 pp.Chemicals with cas numbers 7732-18-5 and 7440-44-0 also play role. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C11D007-50. APPLICATION: JP 82-66224 22 Apr 1982. DOCUMENT TYPE: Patent CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 24, 25 Solvents are recovered on adsorbents and water is added to the adsorbent during desorption to prevent its deterioration. Thus, 1800 m3/h gas contg. cyclohexanone [108-94-1] 10.1, xylene 5.7, and hexane 1.4 g/m3 (24.4 kg/h solvents) was passed through a layer of macroporous active carbon at 30° and 88% humidity and a layer of microporous active carbon at 45° and ~60% humidity with adsorption time 55 min, desorption by 4.5 kg steam/kg solvent over 35 min, and injection of 0.190 g H2O/g active carbon. .