China 
Africa 
Explore chapters and articles related to this topic
Screening Smoke Compositions
Published in Ajoy K. Bose, Military Pyrotechnics, 2021
The hexachloroethane reacts with zinc oxide to form zinc chloride, which being volatile and hygroscopic, reacts with water molecules in the air forming a dense cloud. The main reaction is 3CaSi2+15ZnO+5C2Cl6=15ZnCl2+3CaO+6SiO2+10C+HeatHexachloroethane type C:
An Introduction to Thermitic Reactivity
Published in Anthony Peter Gordon Shaw, Thermitic Thermodynamics, 2020
Chlorocarbons are also capable pyrotechnic oxidizers. The reaction of aluminum, zinc oxide, and hexachloroethane (C2Cl6) produces alumina, zinc chloride, and carbon (equation 1.9). Zinc chloride is aerosolized at the combustion temperature and some of the carbon is entrained in the process [26]. As a result, thick, hygroscopic clouds of gray smoke are produced. In the United States, this reaction served as the basis of smoke-producing munitions including artillery projectiles and smoke grenades, to name a few.
Physical Properties of Individual Groundwater Chemicals
Published in John H. Montgomery, Thomas Roy Crompton, Environmental Chemicals Desk Reference, 2017
John H. Montgomery, Thomas Roy Crompton
Biological. Under aerobic conditions or in experimental systems containing mixed cultures, hexachloroethane was reported to degrade to tetrachloroethane (Vogel et al., 1987). In an uninhibited anoxic sediment–water suspension, hexachloroethane degraded to tetrachloroethylene. The reported half-life for this transformation was 19.7 min (Jafvert and Wolfe, 1987). When hexachloroethane (5 and 10 mg/L) was statically incubated in the dark at 25°C with yeast extract and settled domestic wastewater inoculum for 7 days, 100% biodegradation with rapid adaptation was observed (Tabak et al., 1981).
Dry sliding wear characteristics of Al-7Si-0.3Mg alloy with minor additions of magnesium at high temperature
Published in Tribology - Materials, Surfaces & Interfaces, 2022
A356 alloy was melted in a resistance furnace under a cover flux (45%NaCl + 45%KCl + 10%NaF) and the melt was held at 720°C. After degassing with solid hexachloroethane (C2Cl6), the calculated amount of Mg in the form of Al-20%Mg master alloy chips duly packed in an aluminium foil was added to the melt. The melt was stirred for 30 s with zirconia-coated iron rod after the addition of master alloy, after which no further stirring was carried out. Melts were poured at ‘0’ minutes and ‘5’ minutes into cylindrical graphite mould (25 mm diameter and 100 mm height) surrounded by fire clay brick with top portion open for pouring (microstructural studies) and also the melt was poured into split type graphite mould (12.5 mm diameter and 125 mm height) for preparing wear and tensile (10 mm diameter × 50 mm gauge length) specimens. The ‘0’ minute refers to the melt without the addition of master alloy. The size of the wear test pin taken was 10 mm diameter × 32 mm length, as per ASTM G99 standards [30]. The chemical composition of A356 alloy and Al-20%Mg master alloy were assessed using atomic absorption spectrometer (model Varian AA-240, Netherlands) and are shown in Table 1.
Postsynthetic polymer-ligand exchange hybridization in M-MOF-74 composites
Published in Journal of Coordination Chemistry, 2021
Vincent J. Pastore, Meghan G. Sullivan, Javid Rzayev, Timothy R. Cook
Acetone, N,N-dimethylformamide (DMF), methanol (MeOH), 2,5-dioxido-1,4-benzenedicarboxylate (DOBDC), magnesium(II) acetate tetrahydrate (Mg(OAc)2·4H2O), manganese(II) acetate tetrahydrate (Mn(OAc)2·4H2O), cobalt(II) acetate tetrahydrate (Co(OAc)2·4H2O), nickel(II) acetate tetrahydrate (Ni(OAc)2·4H2O), zinc(II) acetate dihydrate (Zn(OAc)2·2H2O), 4-aminophenyl ether (ODA), 1,2,4,5-benzenetetracarboxylic anhydride (PMDA), hexachloroethane, triphenylphosphine, N-methyl-2-pyrrolidone (NMP), and pyridine were purchased from commercial vendors and used as received without further purification. PAA was obtained following previously reported synthetic procedures [6] and characterized by GPC and 1H NMR spectroscopy.
Investigations on mechanical and tribological properties of Al-Si10-Mg alloy/sugarcane bagasse ash particulate composites
Published in Particulate Science and Technology, 2018
S. Shankar, A. Balaji, N. Kawin
The synthesis of the hybrid aluminum metal matrix composite (AlSi10Mg + Sugarcane Bagasse Ash) used in this study was carried out using stir casting process. Stir casting equipment consists of a furnace and a stirrer that is used to mix the reinforcement thoroughly with the molten metal. The sugarcane bagasse ash was preheated in the separate furnace at 600°C for 3 h. The small pieces of aluminum alloy were added in the stir casting furnace and calcined at 800°C to allow the melting of the metal. Then the ash particles were added slowly into the alloy melt with 1–2 grams per stroke of the stirrer. 1 wt% of Magnesium was added further in the melt to remove the voids, and 3 wt% of the degassing agent hexachloroethane (C2Cl6) was added to increase the wettability between the matrix and reinforcement. The stirring was continued for another 10 min even after the completion of feeding the ash particles. The mixture was poured into the mold that was preheated to obtain the uniform solidification. Similar procedure was repeated for different weight volume fractions of 6%, 9%, and 12% ash particle reinforcements.