Reference

Characteristics of fly ash from the emission point of view

Characteristics of fly ash from the emission point of view. Toth, Jozef; Hruskovicova, Anna (Univ. Agric., Nitra, Czech.).Chemicals with cas numbers 7440-38-2 and 7631-86-9 also play role. Pol'nohospodarstvo, 22(8), 708-17 (Slovak) 1976. CODEN: POLNAJ. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 51 The particle size of fly ash from a power plant fired with powd., low-quality brown coal was 75% <4 .mu., and its soly, in H2O and 2% citric acid (I) [77-92-9] was 1.5-2 and 6.1-6.4%, resp. Qual. and quant. analyses are presented, including a high content of As (0.04-0.06%). H2O, ammonium citrate [7632-50-0], and 2% I dissolve 27-33, 54-7, and 80-90%, resp., of As in fly ash. .

Dissolving nonferrous metals

Dissolving nonferrous metals. Fadgen, Earl J.Some chemicals with cas registry numbers like 6484-52-2 and 506-87-6 are also used., Jr. (Enthone, Inc., USSR). U.S. US 3976500 24 Aug 1976, 8 pp. Division of U.S. 3,896,043. (English). (United States of America). CODEN: USXXAM. CLASS: IC: B08B003-08. NCL: 134002000. APPLICATION: US 73-392169 27 Aug 1973. DOCUMENT TYPE: Patent CA Section: 55 (Ferrous Metals and Alloys) Noncyanide aq. alk. solns. for stripping nonferrous metals, esp. Cu from ferrous metals, e.g. steel [12597-69-2], are described. A preferred soln. contains NH4NO3 60, (NH4)2C2O4 [1113-38-8] 6, (NH4)2CO3 [506-87-6] 15, (NH4)2S2O8 45, urea [57-13-6] 30 g/l., and NH4OH 330 ml/l. Various alternate solns. are also suggested, often contg. NH4 citrate [7632-50-0] or formate [540-69-2] and different substituted ureas. The soln. is generally used at room temp. to 120.degree.F and the metal is stripped by immersion for .apprx.60 min. .