【Chemical Engineering Theory】I would appreciate your guidance: definitions of non-aromatic hydrocarbons, aromatic hydrocarbons, and heavy aromatic hydrocarbons
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This post was last edited by Xiao Gong 1985 on 2016-8-8 at 15:28. Please advise: the definitions of non-aromatic hydrocarbons, aromatic hydrocarbons, and heavy aromatic hydrocarbons
Heavy aromatics are mixed aromatics with a molecular weight greater than that of xylene. Aromatic hydrocarbons, abbreviated as “aromatics,” generally refer to hydrocarbons that contain benzene ring structures in their molecules. This post was last edited by zhenghemqx on 2009-2-8 at 23:28.]
What was said upstairs is correct; these three types are distinguished by their benzene rings, and their meanings can be understood from their names. Heavy aromatics refer to aromatics with a carbon chain length of >C9. They mainly consist of aromatics produced as by-products during the processing of petroleum and coal, namely CJ aromatics (primarily Cg and Cm aromatics). These heavy aromatics originate from the catalytic reforming units in refineries, the wide-range catalytic reforming units in polyester raw material plants, ethylene production facilities, as well as the by-products of high-temperature coal coking
"\"Non-aromatics, aromatics, and heavy aromatics\" are terms that frequently appear in combined aromatic production. Aromatics refer to C6–C8 aromatics, namely benzene, toluene, and xylene; heavy aromatics refer to aromatics with a carbon chain length of C9 or more. Non-aromatics refer to the extraction products that contain no aromatics after the removal of those compounds, also known as raffinate oil
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Weren’t you taught it when you were in school? BTX refers to light aromatic hydrocarbons; those that are larger than X are heavy aromatic hydrocarbons. Those that are smaller than B must be non-aromatic hydrocarbons. Of course, there are also heavy non-aromatic hydrocarbons, which have a carbon count of six or more but lack benzene rings
1. Aromatic hydrocarbons refer to hydrocarbons that contain a benzene ring in their structure. The most commonly used basic organic raw materials are benzene, ethylbenzene, and p-xylene; in addition, there are toluene and o-xylene. 2. Heavy aromatics refer to mixed aromatics with a molecular weight greater than that of xylene. It mainly comes from reformed heavy aromatics, pyrolyzed gasoline heavy aromatics, and coal tar. It is a mixed aromatic compound whose main component is nonane aromatic hydrocarbon. It can be directly used as a raw material for gasoline, high-boiling-point solvents, petroleum resins, carbon black, etc.