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By A D Aleksandrov, V A Zalgaller, J M Danskin
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5 Isoprene (2-methyl-1,3-butadiene) is a colorless liquid, soluble in alcohol but not in water. 1°C. Isoprene is the second important conjugated diene for synthetic rubber production. The main source for isoprene is the dehydrogenation of C5 olefins (tertiary amylenes) obtained by the extraction of a C5 fraction from catalytic cracking units. It can also be produced through several synthetic routes using reactive chemicals such as isobutene, formaldehyde, and propene (Chapter 3). The main use of isoprene is the production of polyisoprene.
The main source for isoprene is the dehydrogenation of C5 olefins (tertiary amylenes) obtained by the extraction of a C5 fraction from catalytic cracking units. It can also be produced through several synthetic routes using reactive chemicals such as isobutene, formaldehyde, and propene (Chapter 3). The main use of isoprene is the production of polyisoprene. It is also a comonomer with isobutene for butyl rubber production. AROMATIC HYDROCARBONS Benzene, toluene, xylenes (BTX), and ethylbenzene are the aromatic hydrocarbons with a widespread use as petrochemicals.
The following shows a porphyrin structure: Separation of nitrogen compounds is difficult, and the compounds are susceptible to alteration and loss during handling. However, the basic lowmolecular weight compounds may be extracted with dilute mineral acids. Oxygen Compounds Oxygen compounds in crude oils are more complex than the sulfur types. However, their presence in petroleum streams is not poisonous to processing catalysts. Many of the oxygen compounds found in crude oils are weakly acidic.