"Chemical engineering is a branch of engineering that applies the natural (or experimental) sciences (e.g., chemistry and physics) and life sciences (e.g. Use these shapes for drawing block flow diagrams (BFD), process flow diagrams (PFD), piping and instrumentation diagrams (P&ID), and water flow diagrams. The vector stencils library "Chemical engineering" contains 24 symbols of chemical and process engineering equipment. The process flow diagram (PFD) example "Jet fuel mercaptan oxidation treating" was drawn using the ConceptDraw PRO software extended with the Chemical and Process Engineering solution from the Chemical and Process Engineering area of ConceptDraw Solution Park. The Merox process is usually more economical than using a catalytic hydrodesulfurization process for much the same purpose." The liquid hydrocarbon disulfides may remain in the sweetened products, they may be used as part of the refinery or natural gas processing plant fuel, or they may be processed further. Processes within oil refineries or natural gas processing plants that remove mercaptans and/ or hydrogen sulfide (H2S) are commonly referred to as sweetening processes because they results in products which no longer have the sour, foul odors of mercaptans and hydrogen sulfide. In other versions, the catalyst is impregnated onto charcoal granules. The catalyst in some versions of the process is a water-soluble liquid. In other versions of the process, the alkalinity is provided by ammonia, which is a weak base. The Merox process requires an alkaline environment which, in some of the process versions, is provided by an aqueous solution of sodium hydroxide (NaOH), a strong base, commonly referred to as caustic. It is a proprietary catalytic chemical process developed by UOP used in oil refineries and natural gas processing plants to remove mercaptans from LPG, propane, butanes, light naphthas, kerosene and jet fuel by converting them to liquid hydrocarbon disulfides. "Merox is an acronym for mercaptan oxidation. This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported icense. This PFD of jet fuel mercaptan oxidation treating was redrawn from Wikipedia file: ConvLPGMerox.png. The example "Design elements - Process annotations" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Chemical and Process Engineering solution from the Engineering area of ConceptDraw Solution Park. In the chemical industry, chemical engineers will use the following to define or illustrate a process: Constraints imposed on the tasks and resources required to implement them are essential for executing the tasks mentioned.Ī chemical process is a series of unit operations used to produce a material in large quantities. For example, System Engineering processes of the EIA-632 and processes involved in the Capability Maturity Model Integration (CMMI) institutionalization and improvement approach. Systems Engineering normative documents and those related to Maturity Models are typically based on processes. These tasks may be carried out by people, nature, or machines using resources so an engineering process must be considered in the context of the agents carrying out the tasks, and the resource attributes involved. "In engineering a process is a set of interrelated tasks that, together, transform inputs into outputs. Use these shapes for setting automatic labels to display a datasheet field for a pipeline shape, labels, captions, outlines, off-sheet labels, text balloons, annotations, outlines, tags, and descriptions. The vector stencils library "Process annotations" contains 22 symbols of interface points, slope, off-sheet labels, callouts and textboxes.
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