Mass Spectrometry & Spectroscopy

  • Monitoring Catalyst Concentration in Purified Terephthalic Acid Production 

Monitoring Catalyst Concentration in Purified Terephthalic Acid Production 

Jul 08 2019 Read 711 Times

Purified Terephthalic Acid (PTA) is a white crystalline powder used as a precursor in the production of common plastics such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). These materials are used in many different products, including polyester fibres, packaging, electronics and construction materials. Global production of PTA reached 61.2 million tons in 2016.

The production of PTA is a multi-step process involving hazardous and corrosive substances. The manufacturing process involves the oxidation of paraxylene in acetic acid. This process relies on a cobalt-manganese-bromide catalyst. The quantities of the catalyst must be carefully controlled to ensure high yields at high quality. Regular measurements of the catalyst concentration by X-ray fluorescence (XRF) analysis helps to monitor the reaction, ensuring just the right amount of catalyst is present in the solution.

Hitachi High-Tech’s X-Supreme8000 is a benchtop energy dispersive XRF analyser that can help you monitor your processes in PTA production. It’s simple to use, so can be operated by either laboratory or production staff. It provides rapid sample analysis with virtually no sample preparation. The X-Supreme8000 is the workhorse of many production facilities and is often in use 24/7. 

You can test for the catalyst elements cobalt, manganese and bromine simultaneously. High precision, fast measurement times and low detection limits are achieved with a high-reliability tungsten target X-ray tube and a high-resolution silicon drift detector with optimised measurement parameters. The use of a Helium purge under the sample helps reduce the potential adverse effects of a corrosive atmosphere. The X-Supreme’s rugged design means it can be located right next to the production process, helping to keep production delays to a minimum.

More information online

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment

Digital Edition

Labmate UK & Ireland September 2019

September 2019

Articles Finding an easy, cost-effective way to break into new markets Exploring safe and intelligent multi-application liquid nitrogen cooling via auto-fill technology Characterisation o...

View all digital editions


Analitica Latin America

Sep 24 2019 Sao Paulo, Brazil

Pharma Asia

Sep 24 2019 Karachi, Pakistan


Sep 24 2019 Basel, Switzerland


Sep 25 2019 Bangkok, Thailand


Sep 25 2019 Kiev, Ukraine

View all events