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p-Xylene (para-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes . The p- stands for para- , indicating that the two methyl groups in p -xylene occupy the diametrically opposite substituent positions 1 and 4.
p-Xylene is the principal precursor to terephthalic acid and dimethyl terephthalate, both monomers used in the production of polyethylene terephthalate (PET) plastic bottles and polyester clothing. 98% of p-xylene production, and half of all xylenes produced is consumed in this manner. [10] [14] o-Xylene is an important precursor to phthalic ...
In the petroleum refining and petrochemical industries, the initialism BTX refers to mixtures of benzene, toluene, and the three xylene isomers, all of which are aromatic hydrocarbons. The xylene isomers are distinguished by the designations ortho – (or o –), meta – (or m –), and para – (or p –) as indicated in the adjacent diagram.
Toluene disproportionation (TDP) is the conversion of toluene to benzene and xylene. [66] Given that demand for para-xylene (p-xylene) substantially exceeds demand for other xylene isomers, a refinement of the TDP process called Selective TDP (STDP) may be used. In this process, the xylene stream exiting the TDP unit is approximately 90% p ...
for p-Xylene/carbon tetrachloride [6] P = 760 mm Hg BP Temp. °C % by mole carbon tetrachloride liquid vapor 136.4: 1.7: 5.9 131.1: 6.3: 21.6 126.2: 11.1: 34.9 121.8 ...
Xylene is often used in paints, glues, pesticides and cleaning agents. Xylene also is used in the plastics, chemical and synthetic fiber industries. As a vapor, xylene is heavier than air, so it ...
A Minnesota woman was scrolling through TikTok when she plowed her car into a retired grandfather, killing him, cops said.. Mariska Nunn, 20, was charged with felony criminal vehicular homicide on ...
Heteroarenes are aromatic compounds, where at least one methine or vinylene (-C= or -CH=CH-) group is replaced by a heteroatom: oxygen, nitrogen, or sulfur. [3] Examples of non-benzene compounds with aromatic properties are furan, a heterocyclic compound with a five-membered ring that includes a single oxygen atom, and pyridine, a heterocyclic compound with a six-membered ring containing one ...