Hexamethylenediamine Production from Butadiene
Hexamethylenediamine Production Costs Report | Issue A | Q3 2024
| Report Details |
| 200 kta United States-based plant | Q3 2024 | 107 pages |
This report presents a cost analysis of a 200 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 report presents the economics of Hexamethylenediamine (HMDA) production from butadiene. In the process examined, butadiene is reacted with hydrogen cyanide to generate adiponitrile intermediate, which is then hydrogenated to HMDA. The economic analysis performed assumes a plant located in the United States.
The report provides a comprehensive study of Hexamethylenediamine production and related Hexamethylenediamine production cost, covering three key aspects: a complete description of the Hexamethylenediamine production process examined; an in-depth analysis of the related Hexamethylenediamine plant capital cost (Capex); and an evaluation of the respective Hexamethylenediamine plant operating costs (Opex).
The Hexamethylenediamine 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 Hexamethylenediamine 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 Hexamethylenediamine 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 comprises four major sections: (1) Hydrocyanation; (2) Adiponitrile Separation; (3) Hydrogenation; and (4) HDMA Purification.
Hydrocyanation. In the first reaction stage, butadiene is fed to the reactor, along with hydrogen cyanide. This reaction produces different isomers of pentenenitriles and branched butenenitriles. Catalyst and unconverted reactants are separated from reaction mixture and recycled to the reactor. As the hydrocyanation of branched butene nitriles does not yield adiponitrile, they must also be separated from linear nitriles prior to second hydrocyanation step. Separation is accomplished in a distillation column and separated branched nitriles are further treated for recovery of 2-methyl-3-butenenitrile (2M3BN). 2M3BN is fed into an isomerization reactor, where it is converted to useful 3-pentenenitrile (3PN), which is mixed with the linear pentenenitriles previously obtained and fed to the second hydrocyanation reactor. The reactor is also fed with fresh HCN, as well as fresh and recycled catalyst solution. Adiponitrile is the main product formed in the reaction, but some yield losses may occur due to the formation of by-products.
Adiponitrile Separation. First, catalyst is separated from reaction mixture and recycled to the reactor. The product stream is passed through three distillation steps to recover mononitriles, dinitriles and dimers as well as other high boiling compounds. Purified adiponitrile is routed to the hydrogenation section.
Hydrogenation. Adiponitrile, fresh and recycle hydrogen are fed to a “gas-lift” reactor, where they quickly react on the surface of RaneyTM nickel catalysts yielding Hexamethylenediamine (HMDA). High catalyst concentrations are used to keep the concentration of unreacted nitriles very low. Water and caustic soda are fed to the reactor so as to make up for losses leaving in the crude HMDA.
HDMA Purification. Crude HMDA is passed through a distillation train, so as to remove water, 1,2-diaminocyclohexane (DCH) and high boilers. DCH is still sent to a column, in which residual HDMA is recovered, before it is purged.
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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 Hexamethylenediamine 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 Hexamethylenediamine 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 Hexamethylenediamine 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 Hexamethylenediamine 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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