Commodity Production Costs Report
Paraxylene from Mixed Xylenes (Only Adsorption and Isomerization)
p-Xylene Operating Costs & Plant Construction Costs
This report examines the costs related to a typical process for p-Xylene production from mixed xylenes via adsorption and isomerization in the United States. The remaining xylenes as well as the ethylbenzene are isomerized and recycled to the adsorption unit.
The report provides a comprehensive study of p-Xylene production and related p-Xylene production cost, covering three key aspects: a complete description of the p-Xylene production process examined; an in-depth analysis of the related p-Xylene plant capital cost (Capex); and an evaluation of the respective p-Xylene plant operating costs (Opex).
The p-Xylene 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 p-Xylene 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 p-Xylene plant operating costs analysis covers operating expenses, including variable costs like raw materials and utilities, and fixed costs such as maintenance, labor, and depreciation.
Key reference(s): ?
The process under analysis comprises two major sections: (1) Products Separation; and (2) Isomerization.
Products Separation. A fresh mixed xylenes stream is first clay treated to remove impurities, then fed along with a recovered mixed xylenes stream to a distillation column. The column bottom stream is a valuable heavy aromatics stream, sold to nearby facilities. The distillate is passed through an adsorption unit, where the Paraxylene product is extracted from other major streams that are sent to isomerization. The extract is submitted to distillation steps, from which high purity Paraxylene and a small amount of toluene are obtained.
Isomerization. C8 aromatic compounds - ethyl benzene, meta-xylene, and ortho-xylene - and residual nonaromatics are stripped off from the dilute raffinate produced in the adsorption unit. A desorbent-rich stream is purified from heavy impurities and recycled to the adsorption unit. Then, the C8 stream is vaporized, mixed with hydrogen, and heated up to the isomerization reaction temperature. This hot feed stream is passed radially through a fixed bed of a molecular sieve catalyst, in such a way that part of the aromatics are converted to Paraxylene. Such isomerization step reestablishes a near-equilibrium distribution of xylene isomers. After further distillation steps, a stream of recovered xylenes, a liquid stream of light hydrocarbons (C7-), and a stream of non-condensables are obtained. The xylenes are recycled to the adsorption unit, the C7- fraction is sold to nearby units and the non-condensables are reused as fuel in the plant.
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Professional report based on Q3 2024 economic data, ensuring timely evaluations.
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Content Highlights
Plant Capital Cost Summary
Summary outlining the capital cost required for building the p-Xylene 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 p-Xylene 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 p-Xylene 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 p-Xylene 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
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Other p-Xylene Production Cost Reports
Paraxylene from Mixed Xylenes (Ethylbenzene Dealkylation)
It presents the economics of a process for p-Xylene production from mixed xylenes in the United States, via isomerization followed by ethylbenzene (EB) dealkylation. In this process, a mixture of C8 aromatics is sent to an adsorption unit for the recovery of p-Xylene. The remaining xylenes are isomerized to equilibrium and the EB is dealkylated to benzene by-product.
Details: 1100 kta United States-based plant | Q3 2024 | 107 pages | Issue C | From $799 USD
Paraxylene from Mixed Xylenes (P-Xylene Crystallization)
This report analyses the economics of a process for p-Xylene production from mixed xylenes in the United States. In this process, a mixture of C8 aromatics is sent to a crystallization recovery unit for p-Xylene separation. The remaining xylenes are isomerized to equilibrium and the EB is dealkylated to benzene by-product.
Details: 1100 kta United States-based plant | Q3 2024 | 107 pages | Issue D | From $799 USD
Paraxylene from Mixed Xylenes (O-Xylene Recovery)
It presents the economics of a typical process for p-Xylene production from mixed xylenes in the United States. In this process, o-xylene is also generated as by-product.
Details: 600 kta United States-based plant | Q3 2024 | 107 pages | Issue E | From $799 USD
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