Purified Terephthalic Acid from p-Xylene (GTC Technology)
Terephthalic Acid Production Costs Report | Issue D | Q2 2024
Report Details |
750 kta United States-based plant | Q2 2024 | 107 pages |
This report presents a cost analysis of a 750 kta (kilo metric ton per annum) United States-based plant. You can add a customized cost analysis, assuming another location (country), when ordering a premium edition of this report.
Report Abstract
This analysis presents production cost of Purified Terephthalic Acid (PTA) production from p-xylene. The process examined in this report is similar to that one developed by GTC Technology. Differently from the conventional technology, this process does not involve a hydrogenation step for Terephthalic Acid purification after oxidation. The economic analysis assumes a plant located in the USA..
The report provides a comprehensive study of Terephthalic Acid production and related Terephthalic Acid production cost, covering three key aspects: a complete description of the Terephthalic Acid production process examined; an in-depth analysis of the related Terephthalic Acid plant capital cost (Capex); and an evaluation of the respective Terephthalic Acid plant operating costs (Opex).
The Terephthalic Acid production process description includes a block flow diagram (BFD), an overview of the industrial site installations, detailing both the process unit and the necessary infrastructure, process consumption figures and comprehensive process flow diagrams (PFD). The Terephthalic Acid plant capital cost analysis breaks down the Capex by plant cost (i.e., ISBL, OSBL and Contingency); owner's cost; working capital; and costs incurred during industrial plant commissioning and start-up. The Terephthalic Acid plant operating costs analysis covers operating expenses, including variable costs like raw materials and utilities, and fixed costs such as maintenance, labor, and depreciation.
Process Schematic
The process under analysis can be divided into three main areas: (1) Oxidation; (2) Purification; and (3) Finishing.
Oxidation. P-xylene and the catalyst are mixed with the acetic acid solvent and fed to a CSTR. Air is also introduced to the reactor, from its bottom, to act as the oxidizing agent to turn p-xylene into Terephthalic Acid. The heat of reaction causes the evaporation of the water produced and some of the solvent and p-xylene. This gaseous mixture is vented from the reactor along with the reaction residual gas and then fed to a column producing a bottom stream of acetic acid and p-xylene that returns to the reactor and an overhead stream that is treated in a catalytic combustion unit before being discharged. From the bottom of the reactor comes out a slurry of Crude Terephthalic Acid that proceeds to purification steps downstream.
Purification. The CTA slurry is filtered and washed with p-xylene. The mother solution and the wash effluent are returned to the reactor, while the separated cake is solubilized in NMP, heated, and bubbled with nitrogen to remove remaining p-xylene, which is returned to the reactor while the solution proceeds to a crystallizer. In the crystallizer, the temperature is dropped, causing precipitation of the Terephthalic Acid, which forms a slurry to be filtered. In this second filtration, the cake is washed with NMP. The mother solution and the wash effluent are fed to a distillation column to recover the NMP while the cake receives fresh NMP and proceeds to a second crystallization. Again, the temperature is reduced, a terephthalic acid slurry is formed and it is sent to filtration. In this third filtration, the cake is washed with NMP and with methanol. The mother solution and the NMP wash are recycled as solvents for the step preceding the first filter, the methanol wash is recovered, and the cake goes to a dryer.
Finishing. The purified Terephthalic Acid crystals, coming out of the third filtration, are dried and sent to storage. The separated methanol leaving the dryer is recovered and recycled.
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Production Process Information
Process Consumptions
Labor Requirements
Plant Capital Cost Summary
Operating Cost Summary
Production Costs Datasheet
Plant Capital Cost Details
Operating Cost Details
Plant Cost Breakdowns
Plant Capacity Assessment
Process Flow Diagrams
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Content Highlights
Plant Capital Cost Summary
Summary outlining the capital cost required for building the Terephthalic Acid production plant examined
Plant Capital Cost Details
Detailing of fixed capital (ISBL, OSBL & Owner’s Cost), working capital and additional capital requirements
Plant Cost Breakdowns
Breakdown of Terephthalic Acid process unit (ISBL) costs and infrastructure (OSBL) costs; plant cost breakdown per discipline
Operating Costs Summary
Summary presenting the operating variable costs and the total operating cost of the Terephthalic Acid production plant studied
Operating Cost Details
Detailing of utilities costs, operating fixed costs and depreciation
Plant Capacity Assessment
Comparative analysis of capital investment and operating costs for different Terephthalic Acid plant capacities
Production Process Information
Block Flow Diagram, descriptions of process unit (ISBL) and site infrastructure (OSBL)
Process Consumptions
Raw materials and utilities consumption figures, by-products credits, labor requirements
Process Diagrams
Process flow diagrams (PFD), equipment list and industrial site configuration
Other Terephthalic Acid Production Cost Reports
Medium-Purity Terephthalic Acid Production
This report presents the economics of Medium-Purity Terephthalic Acid (MTA) production. The analysis is based on a plant located in the United States starting from p-xylene using a typical catalytic oxidation process. In this process, p-xylene is oxidized to terephthalic acid (TPA). Then, the TPA is crystallized and recovered from the liquor and MTA is obtained as the final product.
Details: 750 kta United States-based plant | Q2 2024 | 107 pages | Issue A From $799 USD
The cost analyses presented in this report target a 750 kta (kilo metric ton per annum per annum) United States-based plant. For those interested in cost analyses considering other plant capacities and/or locations, Intratec offers a customized analysis as an optional feature.
Purified Terephthalic Acid from p-Xylene (Conventional Process)
This study presents the economics of Purified Terephthalic Acid (PTA) production using p-xylene as the process feedstock. The study approaches the construction of a plant in the United States employing a conventional catalytic oxidation process. In this process, p-xylene is oxidized to terephthalic acid (TPA). The TPA is subjected to separation and drying steps, and then sent to hydrogenation to obtain PTA as the final product.
Details: 700 kta United States-based plant | Q2 2024 | 107 pages | Issue B From $799 USD
The cost analyses presented in this report target a 700 kta (kilo metric ton per annum per annum) United States-based plant. For those interested in cost analyses considering other plant capacities and/or locations, Intratec offers a customized analysis as an optional feature.
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