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.

Method for the distillation of vinyl aromatic compounds using polymerization inhibitors with low-volatility

Abstract: A method and apparatus is disclosed for the distillation of readily polymerizable vinyl aromatic compounds with polymerization inhibitors of low volatility, particularly a phenothiazine (PZ)-tertiarybutylcatechol (TBC) polymerization inhibitor combination. The method comprises introducing a feed of impure vinyl aromatic compound into a typical distillation train comprising a first fractionation column, a recycle column, and a finishing column; introducing as a separate stream into the upper portion of said recycle column and into said first fractionation column an effective amount of the PZ-TBC inhibitor in a volatile aromatic hydrocarbon diluent; and then distilling the vinyl aromatic compound in the presence of oxygen to recover an overhead product of high purity vinyl aromatic compound and a bottoms fraction.

Effect of temperature on the formation and degradation of polycyclic aromatic hydrocarbons

Abstract: Polyaromatic hydrocarbons (PAHs) are a class of aromatic hydrocarbon compounds which are catagorised as pollutants with carcinogens, and mutagenic characteristics. Scientifically, incomplete combustion and petroleum compounds emission were proven as a major source of PAHs. Thermal degradation of PAHs is one of the methods to destroy the pollutants as well as their hazardous by-products. During thermal treatment process, formation and/or degradation of PAHs is related to their chemical structural stability and rate of degradation. Summarized, PAHs with four or more rings are formed at low-temperature thermal treatment, and only the ones with less than 4 rings are degraded. High-temperature thermal treatment generally forms PAHs with 4 rings or less and degrades 5 rings or more. Due to environmental and human health considerations, thermal treatment of PAHs should be designed to completely degrade or destroy the pollutants as well as their hazardous byproducts. High-temperature thermal treatment and liquid extraction are effective in the treatment of PAHs, but expensive. A cheap alternative treatment method such as optimization of low temperature treatment perhaps combined with catalysis needs to be developed in order to reduce PAHs formation and increase their degradation simultaneously.

Method for producing 6-8c aromatic hydrocarbon

Abstract: PROBLEM TO BE SOLVED: To provide a method for economically producing 6-8C hydrocarbons such as BTX i.e. benzene, toluene and xylene from heavy oil. SOLUTION: The method for producing 6-8C hydrocarbons, is characterized by decreasing the total concentration of indane, alkylindane, indene, alkylindene, naphthalene and alkylnaphthalene and increasing the total concentration of benzene, toluene and xylene by bringing stock oil into contact with a metal carrier catalyst, which stock oil contains at least one selected from indane, alkylindane, indene, alkylindene, naphthalene and alkylnaphthalene. COPYRIGHT: (C)2007,JPO&INPIT