Reference

Impurities in phosphate rock

Impurities in phosphate rock. McClellan, G. H.; Lehr, J. R. (USA).Some commonly used reagents like 10361-65-6 and 7664-38-2 are used in this experiment. Proc. Annu. Meet. - Fert. Ind. Round Table, 32nd., 238-53 (English) 1982. CODEN: PFRWAD. ISSN: 0071-4607. DOCUMENT TYPE: Journal; General Review CA Section: 54 (Extractive Metallurgy) A review with 30 refs. on impurities affecting phosphate rock processing and its final product, and sources of the impurities. Phosphoric acids such as filter-grade acid, merchant-grade acid, superphosphoric acid, ammonium phosphate, onthophosphate suspension fertilizers, and superphosphate are discussed. .

Electrophotographic fabrication of lithographic plates

Electrophotographic fabrication of lithographic plates. (Fuji Photo Film Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 57192963 A2 27 Nov 1982 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: G03G013-26. APPLICATION: JP 81-78865 25 May 1981. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) An electrophotog. plate having a photoconductor-binder mixt. layer is charged, imagewise exposed, coated with an elec. insulating solvent, and the latent images are developed with a conductive developer soln. contg. a desensitizer to give a lithog. plate. The coating of the photoconductor layer with the elec. insulating solvent may be carried out prior to the formation of the latent image. The development can be carried out with a desensitizer-free developer and the developed plate is then treated with a desensitizer soln. Optionally, latent image formation can be carried out by contacting the developer soln. with the elec. insulating solvent and imagewise exposing the plate while an elec. potential is impressed between the developer soln. and the electrophotog. plate. Thus, a ZnO-type electrophotog. paper was charged, imagewise exposed, coated (~3m) with Isopar H, developed by using a roller wrapped with a filter paper wetted with an aq. developer contg. 77-92-9 and 10361-65-6 are just another two chemicals used in this study. Na4[Fe(CN)6] (a desensitizer), (NH4)3PO4, methylene blue, and citric acid, and the Isopar H was then removed to give a lithog. plate. .