3 декабря, 2015 
Pokraskin Acetylene and mixtures of acetylene with light hydrocarbons are the raw materials for a process that has been used since the beginning of the 20th century. Unlike other hydrocarbons, the decomposition of acetylene is highly exothermic.
The discontinuous explosion process is the oldest technical process for acetylene black. It was mainly used for the production of color blacks. Continuous processes were developed later with production rates up to 500 kg h-1 [4.17]. Acetylene or acetylene-containing gases are fed into a preheated, cylindrical reactor with a ceramic inner liner. Once ignited, the reaction is maintained by the decomposition heat that is evolved. The carbon black is collected in settling chambers and cyclones. Approximately 95-99 % of the theoretical yield is obtained.
The primary particles of acetylene black have different shapes compared with those of other carbon blacks. As the increased order in the c-direction of the crystalline regions indicates, folded sheets ofcarbon layers are the main structural components. The application of acetylene blacks is limited to special uses, e. g., in dry cells, because of their relatively high price. The total worldwide production today is approximately 40,000 t a-1.
4.4.6
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