Charcoal-impregnated

On the large scale, cyanuric chloride is produced by the trimerization of cyanogen chloride. The cyanogen chloride is produced by chlorination of hydrogen cyanide and is trimerized by passing it over charcoal impregnated with an alkaline-earth metal chloride at a high temperature (250—480°C). 

Charcoal impregnated with the nitrate exploded lightly during sieving. Possibly a dust or black powder explosion. 

COPSA [CO pressure swing adsorption] A process similar to COPISA but using activated charcoal impregnated with cuprous chloride as the adsorbent for carbon monoxide. Developed by Mitsubishi Kakoki Kaisha. 

Activated charcoal, impregnated with H2S04 may alternatively, be employed in air sampling glycol formed desorbed with water or a suitable organic solvent analyzed by GC-FID. 

As, Se, Sb, Br, I and Hg) were observed on the base-treated filters using the combined techniques of PGAA, INAA and IC. The base-treated filters proved to be very efficient collectors of the acidic gas-phase species, but apparently allow some elemental and organic species to pass through as shown by studies with activated charcoal-impregnated filters. 

A series of experiments were conducted with activated-charcoal impregnated filters being used in both side-by-side studies and in... 

Chloro-l fluoroethane (10) is prepared by treating chloroethene with anhydrous hydrogen fluoride ° in the vapor phase at 20-70 C in the presence of a catalyst consisting of active charcoal impregnated with 10-45 % by weight fluorosulfonic acid or with hydrogen fluoride/ titanium(IV) chloride. ... 

A compn useful as a propellant Is derived from a mixture., with plasticized NC of dry potassium chlorate impregnated with Manila copal resin and of dry potassium chlorate/ charcoal impregnated With a gas oline-paraffin distillate. Burning rate of the grains obtained by extrusion or sheeting/cutting is controlled by the amount of chlorate-resin present Ref s.j. McClung, USP 2483589(1949) ... 

The same reaction can be conducted in the vapor phase (Goodrich around 500 to 600°C, on charcoal impregnated with caustic soda and cyanides. 

The effectiveness of modern masks depends on both physical adsorption and chemical inactivation of the threat agent. For example, in the M17 protective mask the adsorbent, known as ASC Whetlerite charcoal, is charcoal impregnated with copper oxide and salts of silver and chromium.6 The M40 protective mask uses an ASZ impregnated charcoal, which substitutes zinc for the hexavalent chromium (CrVI). The Centers for Disease Control and Prevention and the National Institute for Occupation... 

Activated charcoal impregnated with catalyst can, for example, oxidize formaldehyde into harmless carlxMi dioxide or craivert the highly toxic neural toxin hydrogen sulfide into elemental sulfur. For minor emitters, the impregnated activated charcoal powder is applied to open-celled PUR foam, making it easy to handle. 

Gay-Lussac invented a portable barometer, a steam injector pump, a maximum and minimum thermometer for use in the sea, a modified Volta s eudiometer, and an air thermometer and a spirit blow-lamp. He adapted an ordinary furnace for use as a muffle furnace and described a new method of heating with charcoal impregnated with sodium carbonate. 

Baker and Poziomek studied the reactivity of charcoals impregnated with five different pyridines toward methyl iodide. Different pyridines reacted differently and showed varying efficiencies for the removal of methyl iodide, the most efficient being the pyridine (Table 5.8). When the same charcoal sample was impregnated with different amounts of 4-aminopyridine and 4-vinylpyridine, the retention of... 

The global glucose oxidation rate in a low mass velocity trickle bed was found by Tsukamoto, Morita and Okada [78] to be higher than for a liquid full reactor in which the liquid was presaturated with oxygen. The catalyst was an activated charcoal impregnated with immobilized enzymes. The charcoal was 0.055 and 0.011 cm in size. The reactor was 2.1 cm I.D. and 27 cm long. 

Charcoal impregnated with zinc is able to catalyze, in a 10 mol% loading, the cycloaddition of organic azides and alkynes in DMF at 50 "C, to provide the corresponding 1,4-disubstituted 1,2,3-triazoles and 1,4,5-trisubstituted 1,2,3-triazoles in good to excellent yields (64-95%). The catalyst can be recovered by filtration and reused at least, for three more cycles [65]. 

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