what is the second term from the above list means?
Chemical products obtained from petroleum by refining.
Petrochemical
etrochemicals (also known as petroleum distillates; and sometimes abbreviated as petchems) are the chemical products obtained from petroleum by refining.
how are saturn's moon titan and neptune's triton similar Both of them are geologically active. who discovered the triton? William Lassell. when was it discovered? 10 October,1846. can you mention some physical characteristics of this natural satellite? Triton's crust consists of 55% nitrogen ice with other ices mixed in. Water ice comprises 15–35% and frozen carbon dioxide the remaining 10–20%. Its surface area is 23 million km. how is the atmosphere there? It has a tenuous nitrogen atmosphere, with trace amounts of carbon monoxide and small amounts of methane near its surface. can you tell me when was this first chemical element you just mentioned discovered? It has the symbol N and atomic number 7. where is this element can be found? From nitre (potassium nitrate, saltpetre) and sodanitre (sodium nitrate, Chilean saltpetre). can you tell me how this can be produce? By the fractional distillation of liquid air, or by mechanical means using gaseous air. can you explain the first process just mentioned? It  is the separation of a mixture into its component parts, or fractions. which industries involve in this process of separation? Petroleum refineries, petrochemical and chemical plants, natural gas processing ,and cryogenic air separation plants.
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Petrochemical [SEP] Introduction
Petrochemicals (also known as petroleum distillates; and sometimes abbreviated as petchems) are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane. The two most common petrochemical classes are olefins (including ethylene and propylene) and aromatics (including benzene, toluene and xylene isomers). Oil refineries produce olefins and aromatics by fluid catalytic cracking of petroleum fractions. Chemical plants produce olefins by steam cracking of natural gas liquids like ethane and propane. Aromatics are produced by catalytic reforming of naphtha.