Research and Implementation of Decreasing the Acetic Acid Consumption in Purified Terephthalic Acid Solvent System

2008 ◽  
Vol 16 (4) ◽  
pp. 650-655 ◽  
Author(s):  
Yuan XU ◽  
Qunxiong ZHU
Keyword(s):  
Acetic Acid ◽  
Terephthalic Acid ◽  
Solvent System ◽  
Acid Consumption ◽  
Purified Terephthalic Acid

Research and Application of Extension CBR Fault Diagnosis Method for Process Production

2011 ◽  
Vol 467-469 ◽  
pp. 389-394
Author(s):  
Yuan Xu ◽  
Qun Xiong Zhu ◽  
Yan Qing Wang
Keyword(s):  
Fault Diagnosis ◽  
Terephthalic Acid ◽  
Formal Model ◽  
Solvent System ◽  
Basic Element ◽  
Extension Theory ◽  
Case Description ◽  
Work Efficiency ◽  
Diagnosis Method ◽  
Purified Terephthalic 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.

HIGH-PERFORMANCE THIN LAYER CHROMATOGRAPHIC METHOD FOR THE SIMULTANEOUS QUANTITATION OF LOPINAVIR AND RITONAVIR IN TABLET FORMULATION

INDIAN DRUGS ◽  
2013 ◽  
Vol 50 (01) ◽  
pp. 23-29
Author(s):  
J. D. Fegade ◽  
◽  
N. D Chawla ◽  
R. Y. Chaudhari ◽  
V. R. Patil
Keyword(s):  
Acetic Acid ◽  
High Performance ◽  
Chromatographic Method ◽  
Glacial Acetic Acid ◽  
Solvent System ◽  
Tablet Formulation ◽  
Ich Guidelines ◽  
Rf Values ◽  
Aluminum Plates ◽  
Hptlc Method

The present work describes a simple, accurate and precise HPTLC method for simultaneous quantitation of ritonavir (RVR) and lopinavir (LVR) in tablet formulation. Chromatographic separation of both drugs was performed on precoated aluminum plates, silica gel 60 F254 as the stationary phase and the solvent system consisted of toluene: ethyl acetate: methanol: glacial acetic acid in the ratio of 6.5:2.5:0.5:0.5(v/v/v/v). Densitometric evaluation of the separated zones was performed at 266 nm. The two drugs were satisfactorily resolved with Rf values of 0.242 0.03 and 0.413 0.02 for RVR and LVR, respectively. The accuracy and reliability of the method was assessed by evaluation of linearity (400-2000 ng/spot for RVR and 1600-8000 ng/spot for LVR), precision (intra-day RSD 0.16-0.38% and inter-day RSD 0.21-0.60 % for RVR and intra-day RSD 0.35-0.58 % and inter-day RSD 0.26-0.55 % for LVR) and recovery (99.54 0.62 % for RVR and 100.45 0.65 % for LVR), in accordance with ICH guidelines.

Purified Terephthalic Acid Wastewater Treatment Using Modified Two-Stage UASB Bioreactor Systems

2020 ◽  
Vol 77 (6) ◽  
pp. 1081-1088
Author(s):  
Tayyibe Alpay ◽  
Burcin Karabey ◽  
Nuri Azbar ◽  
Guven Ozdemir
Keyword(s):  
Wastewater Treatment ◽  
Terephthalic Acid ◽  
Two Stage ◽  
Purified Terephthalic Acid
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