Reference

Acute toxicity of ten chlorinated aliphatic hydrocarbons to the fathead minnow (Pimephales promelas)

Acute toxicity of ten chlorinated aliphatic hydrocarbons to the fathead minnow (Pimephales promelas). Walbridge, Charles T.; Fiandt, James T.; Phipps, Gary L.; Holcombe, Gary W. (Environ. Res. Lab., Environ. Prot. Agency, Duluth, MN 55804, USA). Arch. Environ. Contam. Toxicol., 12(6), 661-6 (English) 1983. CODEN: AECTCV. 87-68-3 and 79-01-6 which are cas registry numbers are also used here. ISSN: 0090-4341. DOCUMENT TYPE: Journal CA Section: 4 (Toxicology) Ninety-six-hour median lethal concn. (LC50) values were detd. for 10 chlorinated aliph. hydrocarbons in freshwater flow-through toxicity tests on fathead minnows. The 96-h measured LC50 values in mg/L from combined duplicate tanks were: tetrachloroethylene [127-18-4] 13.4; 1,1,2,2-tetrachloroethane [79-34-5] 20.4; pentachloroethane [76-01-7] 7.34; 1,1,2-trichloroethane [79-00-5] 81.6; hexachlorobutadiene [87-68-3] 0.10; trichloroethylene [79-01-6] 45.0; 1,2-dichloropropane [78-87-5] 140; 1,2-dichloroethane [107-06-2] 116; hexachloroethane [67-72-1] 1.51; 1,3-dichloropropane [142-28-9] 131. .

Regeneration of spent heavy-oil cracking catalyst as a fluidized bed due to nickel and vanadium precipitation

Regeneration of spent heavy-oil cracking catalyst as a fluidized bed due to nickel and vanadium precipitation. (Jushitsuyu Taisaku Gijutsu Kenkyu Kumiai, Japan). Jpn. Kokai Tokkyo Koho JP 58202049 A2 25 Nov 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01J029-38. ICA: C10G011-05. APPLICATION: JP 82-85015 21 May 1982. DOCUMENT TYPE: Patent CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 67 A zeolite catalyst (deactivated by ￡3% Ni and V deposits) is alternately heated at 650-800° in H and in O or air (or in the latter at 1st but in the former at least once), heated at 300-450° in CCl4 [56-23-5], CCl4-C2Cl6 [67-72-1], or H-C2Cl6, and leached with 31 of MeOH [67-56-1], H2O, CHCl3 [67-66-3], CCl4, and Me2CO [67-64-1] at 1-10 kg/cm2, and room temp.-200°. Thus, 20 g spent catalyst contg.There are some reagents with their cas registry numbers 67-66-3 and 7440-02-0 are used in this study. zeolite and rare-earth oxides (4.3% each), 0.51% Ni, and 0.86% V (surface area 105 m2/g and pore vol. 0.42 mL/g) in a 28-mm-diam. quartz tube was heated at 750° in O for 3 h, purged with N, heated in H in 3 cycles (3 h each), and then heated at 400° for 0.3 h in 10% C2Cl6 in CCl4, and leached with MeOH at 50° for 5 h in a Soxhlet extractor. In the micro activity test (ASTM 3907-80) with 5 g catalyst at 482.2°, 2 mL oil/75 s, and space velocity 17.2 h-1, the yields were H 1.10, C5-204.4° fraction 37.0, C1-204.4° fraction 45.0, and coke 9.10% for the spent catalyst, and 0.95, 38.9, 46.9, and 7.67%, resp., for the regenerated catalyst. .