unit process


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unit process

[′yü·nət ‚prä‚ses]
(chemical engineering)
In chemical manufacturing, a process that involves chemical conversion.
References in periodicals archive ?
Continuous processing generally refers to rather continuous operation of unit processes involved in products manufacturing, ideally including rather continuous transfer of components/intermediates from one unit process to the next, exemplified by automobile and other assembly lines and petroleum refineries.
[[Embodied manufacturing energy content of part] = Recorded energy consumption of unit process 1 (kWh)] / [Number of parts processed (no.)]] + [[Recorded energy consumption of unit process 2 (kWh)] / [Number of pdrts processed (no.)]] (1)
Then, an inventory modeling is performed by identifying the unit processes of the two systems and tracking and quantifying the environmental (material, primary energy, air emissions, etc.) and economic flows (transportation, electricity, etc.) associated with the unit processes.
This suggests that LCI scaling is to some extent dependent on the paint process under consideration, with some unit process operations carrying greater associated uncertainty in the results (e.g., basecoat).
Most, if not all, blood services found that their unit process costs for testing were similar to those for split-processing, whereas the unit costs for raw material collection were two to three times greater--ie, in the approximate range of(C / 2 = T = S) to (C / 3 = T = S).
Micromax systems have been applied to a number of production equipment and unit process operations running in either continuous or batch mode.
Results from this pilot project found that, in production trials of 1000 dosage forms manufactured in batches of 100, there were significant time-savings in unit process times from inkjet printing when compared to traditional manufacturing methods with no issues or interaction with the API in the Xaar 1201 printhead or impact on the printheads life.
The process plant design incorporates industry unit process operations, consisting of primary and secondary crushing, closed-circuit ball milling with gravity concentration, intensive leach of gravity concentrate, carbon-in-leach of the gravity tailings, elution, electrowinning, and smelting to produce gold dore.
"The combined expertise of Siemens and Adents will provide drug manufacturers with the best item-level serialization solution, with a competitive cost," said Vincent Masztalerz, head of the business unit Process Automation in France.
The LCA method uses a rigorous systems analysis approach in which each discrete element of a supply chain is defined as a unit process, with inputs from nature and other processes and with outputs to nature and other processes.
With the intention of helping readers attain such skills as flowcharting, performing degree of freedom analyses, identifying possible systems and subsystems, and applying the first law of thermodynamics, they describe real balanced and single unit processes, multiple unit process calculations, balances and reactive processes, multiple systems involving reaction recycling and purging, energy balance without reaction, energy balance with three actions, combined material and energy balances, unsteady state material and energy balances.
Grit and screenings have a widely variable strength of odor depending on how much of the raw sewage is removed in the unit process and the residence time of the material before disposal.