Topic
Aromatic hydrocarbon
About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.
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TL;DR: The stable radical cation of large aromatic hydrocarbons remains a challenge, due to the recessive aromatic character and high reactivity as mentioned in this paper, and the design, synthesis, and characterization of large-scale large aromatic polycyclic compounds is a challenge.
Abstract: The stable radical cation of large aromatic hydrocarbons remains a challenge, due to the recessive aromatic character and high reactivity. Here we report the design, synthesis, and characterization...
22 citations
TL;DR: For separating the special phenolic compound 2,6-xylenol from the model coal tar, the liquid-liquid equilibrium data regarding the four mixtures (toluene + 2, 6-xyenol + glycerol/ethylene glycol/1,... as mentioned in this paper.
Abstract: For separating the special phenolic compound 2,6-xylenol from the model coal tar, the liquid–liquid equilibrium data regarding the four mixtures (toluene + 2,6-xylenol + glycerol/ethylene glycol/1,...
22 citations
Patent•
17 May 2007
TL;DR: In this paper, the ratio of carbons constituting an aromatic ring to the total carbons in the hydrocarbon oil (the aromatic ringconstituting carbon ratio) is 35 mole % or more to catalytic cracking in the presence of hydrogen.
Abstract: A method for producing an LPG fraction, a gasoline fraction, a kerosene fraction, a gas oil fraction, monocyclic aromatic hydrocarbon and a non-aromatic naphtha fraction from hydrocracked oil includes hydrocracking hydrocarbon oil containing polycyclic aromatic hydrocarbon to convert into a light hydrocarbon fraction, and efficiently and selectively producing monocyclic aromatic hydrocarbon with higher valuable alkylbenzenes. The method for producing hydrocarbon fraction comprises subjecting hydrocarbon feedstock containing polycyclic aromatic hydrocarbon and in which the ratio of carbons constituting an aromatic ring to the total carbons in the hydrocarbon oil (the aromatic ring-constituting carbon ratio) is 35 mole % or more to catalytic cracking in the presence of hydrogen. 40% or more of a fraction with a boiling point of 215° C. or higher in the hydrocarbon feedstock is converted into a fraction with a boiling point lower than 215° C., producing hydrocracked oil containing 30 vol % or more of monocyclic aromatic hydrocarbon.
22 citations
Patent•
16 Jan 2003TL;DR: In this paper, a unified process which couples a unique in-situ catalyst regeneration process with a continuous reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene with C2-C30 olefins using a solid acid catalyst supported in the reflux zone (21) of a distillation column (section A).
Abstract: A unified process which couples a unique in-situ catalyst regeneration process with a continuous reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene with C2-C30 olefins using a solid acid alkylation catalyst supported in the reflux zone (21) of a distillation column (section A). Periodic regeneration of the catalyst (sections E, F and G) is carried out with a countercurrent injection of a C4-C16 paraffin (35) below the benzene rectification zone at the top of the column, but above the catalyst zone while the aromatic hydrocarbon reaction feedstock (17) is injected continuously at a point above a rectification zone at the base of the column where the aromatic compound is separated from the paraffin and by-products washed from the catalyst. The use of the C4-C16 paraffin with the aromatic at a mole fraction in the range of 40 to 90% enables a regeneration temperature of about 175 - 250°C. to be achieved and maintained by adjusting the column pressure and aromatic reflux rate. Significantly lower pressures, on the order of 125 to 370 psig, are required to achieve regeneration temperature than would be otherwise required with the use only of the aromatic hydrocarbon to dilute and wash the by-products from the catalyst surfaces.
22 citations
Patent•
29 Jan 1993
TL;DR: In this paper, a process for the conversion of aromatic hydrocarbons including benzene to hydrocarbon components comprising primarily toluene is provided, where a catalyst reaction zone is established having a metal-loaded mordenite catalyst.
Abstract: In accordance with the the present invention, there is provided a process for the conversion of aromatic hydrocarbons including benzene to hydrocarbon components comprising primarily toluene. According to the invention, a catalyst reaction zone is established having a metal-loaded mordenite catalyst. A mixed feedstock of aromatic hydrocarbons, including benzene, xylene(s) and, optionally, ethylbenzene is introduced into the reaction zone and hydrogen is used as a cofeed to provide a reductive environment. The feedstock is contacted with the metal-loaded mordenite catalyst and the conversion of the aromatic hydrocarbon components is conducted under temperature and pressure conditions sufficient to effect the conversion of the feedstock to hydrocarbon components containing primarily toluene. Finally, the conversion product containing primarily toluene is recovered from the reaction zone.
22 citations