PROCESS FOR THE PRODUCTION OF CARBON BLACK

摘要

1492346 Carbon black production VSESO NI INST TEKHNICH UGLERODA 30 June 1976 [30 June l975] 27275/76 Heading ClA Carbon black is produced by saturating with water vapour a heated carrier gas, the carrier gas being in the form of a plasma stream prior to saturation, and then admitting a hydrocarbon feedstock into the saturated heated carrier gas to thermally decompose the feedstock to obtain carbon black, and quenching the carbon black and other decomposition products (mainly H 2 ) to a temperature of from 200‹ to 700‹ C. The water vapour may be introduced into the heated carrier gas both radially and tangentially in relation to the walls of the reaction chamber in a ratio of 3:1 respectively. The hydrocarbon feed stock is preferably introduced into the reaction chamber to contact the water vapour saturated carrier gas at a distance of not less than 5 times the reaction chamber diameter from the point of introduction of the water vapour into the carrier gas. Typical carrier gases are Ar, Xe, H 2 , air, hydrocarbon gases, off-gases of the C black production, or mixtures thereof. Suitable hydrocarbon feedstocks are gaseous hydrocarbons containing up to four C atoms, hydrocarbons of coal or coke origin, heavy oil refinery fractions and mixtures thereof with a correlation index of from 90 to 130; benzene, toluene and the paraffins may also be used, along with thermal cracking gas oil, green oil, anthracene oil, pitch distillates, furfural extracts of thermal cracking and feedstocks obtained in the thermocatalytic cracking of heavy oil fractions. Typical quench rates are 105 to 106 degs./sec., with quench times varying from 10-3 to 10-2 sec.