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Information @ a Glance

  • Xylene is a colourless, flammable liquid with a sweet odour that exists in three forms; meta-xylene, ortho-xylene and para-xylene. The three different forms are known as isomers.
  • Xylenes find varied uses in the chemical industry. A mixture of para, meta and ortho xylenes is used in the production of isophthalic acid and terephthalic acid.
  • O- xylene is a less expensive starting material for the production of phthalic anhydride and offers a higher yield potential.
  • The ISOMAR process is readily adaptable to yielding pure para-xylene when coupled with a UOP parex process unit, or with conventional crystallization, and ortho-xylene of standard purity when coupled with efficient fractionation.
  • ortho-Xylene is used almost exclusively to make phthalic anhydride whose main outlet is plasticizers, which are primarily used in polyvinyl chloride production as well as in the production of alkyd resins and unsaturated polyester resins.
  • The three isomers—ortho-, meta- and para-xylene—represent the major uses of isolated mixed xylenes, and account for most of the consumption, about 92% of total world consumption in 2009; the remaining 8% of mixed xylenes is used for solvent applications or as a gasoline component because of its high-octane value. para-Xylene is the most widely used isomer.
  • It is a solvent commonly used in the manufacture of paint, varnish, glue, printing ink, insecticides, dyes and in the rubber and pharmaceutical product industries.
  • Mixed xylenes, generally manufactured in petroleum refining processes, are produced in the range of 6-7 million metric tonnes a year.

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