Unit Operation

{
  "id": "MLC-T-ENV-029125",
  "term": "Unit Operation",
  "field": "Environment",
  "definition": "1. Those processing steps that occur within distinct equipment that are used, among other things, to prepare reactants, facilitate reactions, separate and purify products, and recycle materials. Equipment used for these purposes includes but is not limited to reactors, distillation columns, extraction columns, absorbers, decanters, dryers, condensers, and filtration equipment.\n\n2. Distinct equipment used in processing, among other things, to prepare reactants, facilitate reactions, separate and purify products, and recycle materials. Equipment used for these purposes includes, but is not limited to, reactors, distillation columns, extraction columns, absorbers, decanters, dryers, condensers, and filtration equipment.\n\n3. Processing steps that occur within distinct equipment that are used, among other things, to prepare reactants, facilitate reactions, separate and purify products, and recycle materials. Equipment used for these purposes includes, but is not limited to, reactors, distillation units, extraction columns, absorbers, decanters, dryers, condensers, and filtration equipment. [40 CFR 63.1361 (CFR 2013)]\n\n4. One or more pieces of process equipment used to make a single change to the physical or chemical characteristics of one or more process streams. Unit operations include, but are not limited to, reactors, distillation units, extraction columns, absorbers, decanters, condensers, and filtration equipment. [40 CFR 63.1423 (CFR 2013)]\n\n5. With regard to a unit, to combust fuel. [40 CFR 97.402 (CFR 2013)][40 CFR 97.502 (CFR 2013)][40 CFR 97.602 (CFR 2013)]\n\n6. Those processing steps that occur within distinct equipment that are used, among other things, to prepare reactants, facilitate reactions, separate and purify products, and recycle materials. There may be several emission episodes within a single unit operation.",
  "references": [
    "40 CFR 63.1251 (CFR 2013)",
    "40 CFR 63.1101 (CFR 2013)",
    "40 CFR 63.2550 (CFR 2013)",
    "40 CFR 63.101 (CFR 2024)",
    "40 CFR 97.702 (CFR 2013)",
    "40 CFR 63.522 (CFR 2018)"
  ],
  "url": "https://mlchart.com/terminology/environment/unit-operation/"
}