Specification for Purified Terephthalic Acid (PTA) with Low p-Toluic Acid

To enhance the work efficiency and systematization degree of fault diagnosis for process production, an extension CBR fault diagnosis (ECFD) method is proposed in which the extension theory applies the formal model to expand the possibility of matter and explore the innovative principle, and the CBR technology provides the ways for solution based on the historical experiences. Considering the characters of the two technologies, some researches are made on the extension basic-element case-description, distance-based extension case-retrieval, and character difference-based extension case-revision for fault diagnosis. Taking the purified terephthalic acid (PTA) solvent system as an application example for fault diagnosis, the ECFD method is proved to be feasible and effective, which provides a new way for diagnosing the production faults accurately.

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A novel fast mass transfer anaerobic inner loop fluidized bed biofilm reactor for PTA wastewater treatment

Water Science & Technology ◽

10.2166/wst.2016.285 ◽

2016 ◽

Vol 74 (5) ◽

pp. 1088-1095 ◽

Cited By ~ 2

Author(s):

Yingwen Chen ◽

Jinlong Zhao ◽

Kai Li ◽

Shitao Xie

Keyword(s):

Mass Transfer ◽

Wastewater Treatment ◽

Fluidized Bed ◽

Terephthalic Acid ◽

Oxygen Demand ◽

Biofilm Reactor ◽

Stable Chemical ◽

Start Up ◽

Operation Stability ◽

Purified Terephthalic Acid

In this paper, a fast mass transfer anaerobic inner loop fluidized bed biofilm reactor (ILFBBR) was developed to improve purified terephthalic acid (PTA) wastewater treatment. The emphasis of this study was on the start-up mode of the anaerobic ILFBBR, the hydraulic loadings and the operation stability. The biological morphology of the anaerobic biofilm in the reactors was also analyzed. The anaerobic column could operate successfully for 46 days due to the pre-aerating process. The anaerobic column had the capacity to resist shock loadings and maintained a high stable chemical oxygen demand (COD) and terephthalic acid removal rates at a hydraulic retention time of 5–10 h, even under conditions of organic volumetric loadings as high as 28.8 kg COD·m−3.d−1. The scanning electron microscope analysis of the anaerobic carrier demonstrated that clusters of prokaryotes grew inside of pores and that the filaments generated by pre-aeration contributed to the anaerobic biofilm formation and stability.

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Test Method for Determination of 4-Carboxybenzaldehyde and p-Toluic Acid in Purified Terephthalic Acid by Reverse Phase High Performance Liquid Chromatography

10.1520/d7884-19 ◽

2019 ◽

Author(s):

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

Terephthalic Acid ◽

High Performance ◽

Test Method ◽

Reverse Phase ◽

Purified Terephthalic Acid

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