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The Dow Chemical Company (Dow) and Davy Process Technology (DPT) announce the launch of Compress PTA, a technology for the production of purified terephthalic acid.

The technology is based on the combination of demonstrated pressure filtration, solvent recovery and integrated water recycle processes.

PTA production is integral to the manufacture of PET (polyethylene terephthalate); a performance polymer used in fibre, film, packaging containers, engineering resins and binder resins.

This technology process offers PTA producers an investment cost reduction of 15 per cent and high reliability, leading to higher capacity utilisation and conversion cost improvement of 20 per cent compared to competing technologies, according to the developers.

It also offers lower environmental impact as it has lower emissions and less liquid waste.

In 2008, Dow and DPT extended their 35-year collaboration on LPOxosm process technology, a technology for producing Oxo alcohols, to include the further development of Dow’s PTA technology.

The Compress PTA technology is jointly licensed, with basic engineering being provided by DPT.

Longer-term improvements are being developed at DPT’s Technology Centre in the UK, with the establishment of pilot facilities to enable the work on further cost reductions.

Dow Technology Licensing

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