Lamp-black

Niobium pentoxide can be reduced with carbon in a two-step process, called the Balke process. Formation of the carbide is the first step. The oxide is mixed with the stoichiometric amount of lamp black, placed in a carbon cmcible, and heated in vacuum to 1800°C ... 

The production process or the feedstock is sometimes reflected ia the name of the product such as lamp black, acetylene black, bone black, furnace black, or thermal black. The reason for the variety of processes used to produce carbon blacks is that there exists a unique link between the manufactuting process and the performance features of carbon black. 

Eady fusing systems, such as that used in the Xerox 914, employed radiant heat produced by incandescent lamps. Black toner is an extremely good... 

Humphry Davy showed carbon particles are the source of luminosity in flames (lamp black). 

Some pigments promote corrosion owing to their content of soluble salts, their reactivity, or their electrochemical action, and thus should be avoided. Rust of the spotted type can be the consequence of their presence in a paint, especially the hrst coat, e.g. of graphite (noble to steel), some red oxides of iron, gypsum, ochre or lamp black. 

The industrial practice for the production of tantalum consists of two steps. In the first, the carbide is made by charging a graphite crucible with an intimate, pelletized mixture of lamp black and tantalum pentoxide and heating it in a high-frequency furnace under a dynamic vacuum (10 torr). In the next step, the ground carbide and the requisite amount of tantalum pentoxide are mixed, palletized, and fed to a reduction furnace where the reduction to the metal occurs. The formation of tantalum carbide as well as the reduction to the metal occur at about 2000 °C. The product leaving the reduction furnace is in the form of pellets or roundels (small cylinders) of porous metal, usually sintered together. 

Boron reacts with sulfur at 600°C becoming incandescent [1]. Mixtures of sulfur with lamp black or freshly calcined charcoal ignite spontaneously, probably owing to adsorbed oxygen on the catalytic surface [2], Mixtures of yellow phosphorus and sulfur ignite and/or explode on heating [3], Ignition of an intimate mixture of red phosphorus and sulfur causes a violent exothermic reaction [4],... 

Prepare Van Urk reagent by adding 0.5 g p-dimethylamino-benzaldehyde, 100 ml water, 100 ml concentrated sulfuric acid. Dissolve 1 mg substance in 1 ml ethanol and mix with 2 ml Van Urk reagent and illuminate for 10 minutes with an ultraviolet lamp (black light). Psilocin gives a blue-grey, psilocybin a red-brown color. 

Irradiation Mercury lamps Mercury lamps Fluorescent tubes Black fluorescent lamps Black fluorescent lamps Solar... 

All organic chemicals are essentially combustible. Combustion of some chemicals, such as sulfur and sulfides of sodium, potassium, and phosphorous, result in the production of hazardous gases, in this case sulfur dioxide. Carbon black, lamp black, lead sulfocyanate, nitroaniline, nitrochlorobenze, and naphthalene are examples of combustible chemicals. 

Synonyms Carbon activated carbon acetylene carbon decolorizing carbon actibon channel black furnace black thermal black gas black lamp black ultracarbon... 

LAMP BLACK (Soot) Gives a reddish flame. 

Carbon black includes several forms of artificially prepared carbon, such as furnace black, channel black, lamp black, and animal charcoal. It is a finely divided form of carbon consisting of particles of extremely fine size. It is obtained by partial combustion (in 50% required air) of vapors of heavy oil fraction of crude oil in a furnace or by thermal cracking of natural gas. Carbon black is used in many abrasion-resistant rubber products including tire treads and belt covers. It also is used in typewriter ribbons, printing inks, carbon paper, and paint pigments. It also can be an absorber for solar energy and UV radiation. 

Emulsification produced by the addition of a dispersed solid to the two liquid phases must likewise be imagined to take place by reason of the solid going to the dineric surface (see p. 106) and being wetted but possessing a different angle of contact for each liquid. A microscopic examination of water emulsified in benzene stabilised with lamp black indicated that this was actually the case. rimr nTTh Benzene... 

Evidently the lamp black is more soluble in the benzene than in the water phase. On increasing the concentration of lamp black in the mixture the curvature of the particles increases and the mean diameter of the emulsion decreases as noted by Moore J.AXj.S). xli. 944, 1919) who obtained the following figures. The... 

Weight of lamp black per 10 C.O. kerosene in 30o.c.N.NH401(grms.) Mean diameter in mm. 

Clark La Motta (Ref 7) showed that LOX made with gas black or lamp black are more sensitive to impact than the standard Bureau of Mines 40% straight Dynamite. Impact sensitivity increased when small amounts of iron oxides, aluminum dust or ferro-silicon were added to the LOX. Impact sensitivity also increased as absorbent particle size was reduced. As the oxygen evapd, impact sensitivity, as expected, decreased... 

Liq oxygen is used with an intimate mixture of a main mass of a solid combustible material such as lamp black together with starch in a proportion materially to reduce the sensitivity of the explosive (eg, 10—30% of 300 mesh starch). H. Sauvage, USP 2076279 (1937)... 

Smoked sheet, 40 lamp black, 1 phenyl-/ -naphthylamine, 3.5 dicumyl peroxide 50 min at 140° C Methyl methacrylate 52 — 96 96... 

Carbonaceous fuel consisted of 2.5% cereal meal and 0.5% lamp-black... 

From this table it will be sean that lamp-black irra-... 

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