2008年10月22日 星期三

Carbon black

謂Carbon Black就是顏色非常黑、顆粒非常細的無定型碳總稱,一般稱為碳黑,是由烴類不完全燃燒而得的煙黑,主要用作汽車輪胎補強和其他橡膠類製品,正因為重要性高,日本BRIDGESTONE遂於墨西哥成立生產基地,來提升輪胎品質和競爭力。 為了拓展中南美洲市場,並強化北美 ...

Carbon black

(¦kär·bən ¦blak) (chemistry) An amorphous form of carbon produced commercially by thermal or oxidative decomposition of hydrocarbons and used principally in rubber goods, pigments, and printer's ink. gas black

Sci-Tech Encyclopedia: Carbon black

An amorphous form of carbon produced commercially by thermal or oxidative decomposition of hydrocarbons. It is used principally in rubber goods, pigments, and printer's ink. It is not an inert filler but enhances and reinforces various properties of rubber.

Manufacturing processes may be classed as contact, furnace, or thermal. In the channel (contact) process, natural gas is burned with insufficient air for complete combustion. The smoky flame from individual burners impinges on a cool channel iron, and carbon black deposited on the channel is removed by a scraper blade. In the furnace process, the hydrocarbon and air are fed into a reactor. Combustion of part of the hydrocarbon raises the temperature to 2000–3000°F (1100–1700°C), causing decomposition of the unburned hydrocarbon to carbon black. A water spray quickly cools the hot reaction products, and the finely divided black is recovered by cyclones and bag filters, In the thermal process, natural gas is decomposed to carbon and hydrogen by heated refractories.


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