Abstract
AbstractTerephthalic acid recovered from alkali reduction wastewaterA process for the recovery and purification of terephthalic acid (TA) from alkali reduction wastewater was developed. The process consisted of two steps: TA was first precipitated from alkali reduction wastewater by acidification. After that, the crude TA produced was dissolved into dimethylacetylamide and purified by cooling crystallization. The results indicated that acidification could reduce the chemical oxygen demand of the wastewater by 83 %, and the purity of TA by crystallization could reach 99.9 %. Furthermore, at an average cooling rate of 1.18 K min–1, the particle size of TA was uniform and the average size was about 100 µm. The isolated terephthalic acid can be recycled as raw material for polyethylene terephthalate production.S.‐C. Wu, Z.‐M. Cheng*, S.‐D. Wang, X.‐L. ShanChem. Eng. Technol. 2011, 34 (10), 1614–1618.DOI: 10.1002/ceat.201100096
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
