Reference

Recovery of chromium from residual liquors in a tannery processing 100 tons/day

Recovery of chromium from residual liquors in a tannery processing 100 tons/day.Some chemicals with cas registry numbers like 7440-47-3 and 12336-95-7 are also used. Velez, Jaime (Entrep. Federico Meiners Ltd., Esperanza, Argent.). Rev. Tech. Ind. Cuir, 76(2), 38-46 (French) 1984. CODEN: RTICAS. ISSN: 0035-4236. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 60 Cr(III) is recovered from spent tanning liquors by filtration, settling , skimming of fats and sediment, pptn. of Cr(OH)3 by Na2CO3 ( Na2CO3-Cr2O3 ratio 1.9:1), filtration, reaction of Cr(OH)3 with H2SO4, and filtration of Cr(OH)SO4. A pilot plant using this method was operated for 8 mo, giving 91.2-24.9% Cr recovery. .

Waterproofing of feathers

Waterproofing of feathers. (France Bed Co., Ltd., Japan). 12336-95-7 and 15659-56-0 are also occured in this study. Jpn. Kokai Tokkyo Koho JP 59030968 A2 18 Feb 1984 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: D06M019-00; B68G003-08. APPLICATION: JP 82-140830 12 Aug 1982. DOCUMENT TYPE: Patent CA Section: 40 (Textiles) Feathers treated with aq. mixts. contg. a Werner-type Cr complex and basic Cr sulfate (I) or basic Al sulfate are water-resistant and washfast and useful for stuffings. Thus, feathers were treated with a mixt. contg. Quilon M [15659-56-0] 0.3, I 0.5, and H2O 10 g for 45 min at 60°, washed, and dried to give water-resistant feathers with good washfastness and good stuffing capacity. .