Synthetic Carbon

Owing to the predominance of the less-substituted enamine, alkylations occur primarily at the less-substituted a-carbon. Synthetic advantage can be taken of this selectivity to prepare 2,6-disubstituted cyclohexanones. The iminium ions resulting from C-alkylation are hydrolyzed in the workup procedure. 

This is a process mainly used in power plants for removal of sorbable contaminants. Activated carbon, synthetic sorbents are the common adsorbents to be used in the process. It may require pH adjustments. The process removal efficiency depends on the nature of the pollutants and the... 

Concerns about the effect of TPP on eutrophication have led many states, cities, and regional governments to ban the use of the compound in syndets. Such bans have caused serious problems for detergent manufacturers, however, because no entirely satisfactory substitute for TPP has yet been found. Two promising candidates are the sodium salt of nitrilotriacetic acid, 3Na, N(CH2C02)3 , or NTA and ethylenediaminetetraacetic acid (EDTA). Both of these compounds act in much the same way as TPP, that is, by sequestering metal ions. Other builders that have been incorporated into syndet formulations include sodium carbonate, synthetic zeolites, borates, and organic polymers known as polycarboxylates. 

Carbon Black Iron Powder Carbon, Synthetic Graphite Cement, Raw Mix Cement Kiln Dust Alcohol-Carbowax Sodium Silicait Water Water TUrbulator TurbulatorVDisc Disc Pelletizer Turbulator /Disc... 

Manufacturing of industrial of industrial carbons, graphite electrodes, anodes, midget electrodes, graphite blocks, graphite crucibles, gas carbons, activated carbon, synthetic diamonds, carbon black, channel black, and lamp black... 

Carbon, Synthetic Graphite Sodium Silicate nirbulaior /Disc... 

Calcium sulphide was a by-product, the sodium carbonate being extracted by crystallization. The process, invented in 1783 by the French chemist Nicolas Leblanc (1742-1806), was the first for producing sodium carbonate synthetically (earlier methods were from wood ash and other vegetable sources). By the end of the 19th century it had been largely replaced by the Solvay process. 

Calcium carbonate, synthetic n. CaC03. Pigment white 18 (77220). Calcium carbonate manufactured by a precipitation process in order to obtain a finer or more uniform particle size range. Four commercial processes are known. Density, 2.65 g/ cm (22.07Ib/gal) O.A., 28-58 particle size, 0.6-30 pm. Syn precipitated calcium carbonate. 

Fiber-reinforced plastic (FRP) Any plastic material, part or structure that contains reinforcing fibers, such as glass, carbon, synthetic, or metal fibers generally having... 

Precipitated calcium carbonate See calcium carbonate, synthetic. 

Bergman also showed that the white ores of iron (ferrous carbonate) contain the aerial acid. He prepared several metallic carbonates synthetically. He later... 

In high performance concrete, dispersed fibres are used frequently because of increased brittleness if compared with ordinary concretes and two aims should be addressed strengthening and increase of fracture toughness, and control of cracks. Various fibres (steel, carbon, synthetic) are used, preferably of small dimensions. 

See coke, delayed coke, filler coke, polygranular graphite polycrystalline carbon, synthetic graphite... 

Some groundwater plumes contaminated by dissolved wastes can be treated by a permeable bed of material placed in a trench through which the groundwater must flow. Limestone in a permeable bed neutralizes acid and precipitates some heavy metal hydroxides or carbonates. Synthetic ion exchange resins can be used in a permeable bed to retain heavy metals and even some anionic species, although competition with ionic species present naturally in the groundwater can reduce the effectiveness of this treatment method. 

Precipitated Calcium Carbonate See Calcium Carbonate, Synthetic. 

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