Reference

Selective flotation of mercury- and antimony-containing sulfide minerals

Selective flotation of mercury- and antimony-containing sulfide minerals. Wang, Xiuyao; Wu, Zhendong (Baiyin Res. Inst. Min. Metall., Peop. Rep. China). Miner. Process. Extr. Metall., Pap. Int. Conf., 677-86. Edited by: Jones, Michael J.; Gill, P. Inst. Min. Metall.: London, UK. (English) 1984. CODEN: 52VSAY. DOCUMENT TYPE: Conference CA Section: 54 (Extractive Metallurgy) Cinnabar [19122-79-3] is sepd. from stibnite by selective flotation with K Bu xanthante [871-58-9] and pine oil, using Pb(NO3)2 for activation and K2Cr2O7 [7778-50-9] as depressant for stibnite. From ore contg. 0.27-0.39 Hg and 1.12-1.55% Sb, a conc. contg. 69.08-70.18 Hg and a conc. contg. 49.39-52.06% Sb (recovery 89-91%) were obtained. The mechanism of flotation is based on the formation of a hydrophilic PbCrO4 [7758-97-6] film.

Analytical investigations of reactions of modern corrosion-inhibiting pigments with iron salts

Analytical investigations of reactions of modern corrosion-inhibiting pigments with iron salts. Lincke, G.; Schroers, O.; Nowak, K. D. (Fachber. Chem., Fachhochsch. Niederrhein, Krefeld, Ger.). Farbe Lack, 82(11), 1003-10 (German) 1976. CODEN: FALAAA. DOCUMENT TYPE: Journal CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 78 The reaction of aq. FeSO4 [7720-78-7] and Fe2(SO4)3 [10028-22-5] at 20.degree. with Pb silicochromate (I) (contg. a nucleus of inactive silicic acid and an active shell of basic lead chromate [18454-12-1]), polyphase pigments (definitely contg. mixed crystals of PbSO4 [7446-14-2] with BaSO4 [7727-43-7], and probably contg. 10294-40-3 and 7720-78-7 which are cas registry numbers of chemicals are mentioned. mixed crystals of PbCrO4 [7758-97-6] with BaCrO4 [10294-40-3] and water of crystn. bound to chromium phosphate [16453-74-0]), and Bleicoat D4 was studied by gravimetry and x-ray diffraction. I and polyphase pigments oxidize FeSO4 as a result of their chromate content. The function of PbCrO4 and BaCrO4 as corrosion-inhibiting pigments is clarified chem., and the new pigments are compared with Pb3O4. .