# Commission Implementing Decision (EU) 2017/2117 of 21 November 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for the production of large volume organic chemicals (notified under document C(2017) 7469) (Text with EEA relevance), Division: Acronyms and definitions Extent: E+W+S+N.I. For the purposes of these BAT conclusions, the following acronyms and definitions apply. Commission Implementing Decision 2012/119/EU of 10 February 2012 laying down rules concerning guidance on the collection of data and on the drawing up of BAT reference documents and on their quality assurance referred to in Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions (OJ L 63, 2.3.2012, p. 1). Term used Definition BAT-AEPL Environmental performance level associated with BAT, as described in Commission Implementing Decision 2012/119/EU. BAT-AEPLs include emission levels associated with the best available techniques (BAT-AELs) as defined in Article 3(13) of Directive 2010/75/EU BTX Collective term for benzene, toluene and ortho-/meta-/para-xylene or mixtures thereof CO Carbon monoxide Combustion unit Any technical apparatus in which fuels are oxidised in order to use the heat thus generated. Combustion units include boilers, engines, turbines and process furnaces/heaters, but do not include waste gas treatment units (e.g. a thermal/catalytic oxidiser used for the abatement of organic compounds) Continuous measurement Measurement using an ‘automated measuring system’ permanently installed on site Continuous process A process in which the raw materials are fed continuously into the reactor with the reaction products then fed into connected downstream separation and/or recovery units Copper The sum of copper and its compounds, in dissolved or particulate form, expressed as Cu DNT Dinitrotoluene EB Ethylbenzene EDC Ethylene dichloride EG Ethylene glycols EO Ethylene oxide Ethanolamines Collective term for monoethanolamine, diethanolamine and triethanolamine, or mixtures thereof Ethylene glycols Collective term for monoethylene glycol, diethylene glycol and triethylene glycol, or mixtures thereof Existing plant A plant that is not a new plant Existing unit A unit that is not a new unit Flue-gas The exhaust gas exiting a combustion unit I-TEQ International toxic equivalent – derived by using the international toxic equivalence factors, as defined in Annex VI, part 2 to Directive 2010/75/EU Lower olefins Collective term for ethylene, propylene, butylene and butadiene, or mixtures thereof Major plant upgrade A major change in the design or technology of a plant with major adjustments or replacements of the process and/or abatement units and associated equipment MDA Methylene diphenyl diamine MDI Methylene diphenyl diisocyanate MDI plant Plant for the production of MDI from MDA via phosgenation New plant A plant first permitted on the site of the installation following the publication of these BAT conclusions or a complete replacement of a plant following the publication of these BAT conclusions New unit A unit first permitted following the publication of these BAT conclusions or a complete replacement of a unit following the publication of these BAT conclusions NOX precursors Nitrogen-containing compounds (e.g. ammonia, nitrous gases and nitrogen-containing organic compounds) in the input to a thermal treatment that lead to NOX emissions. Elementary nitrogen is not included PCDD/F Polychlorinated dibenzo-dioxins and -furans Periodic measurement Measurement at specified time intervals using manual or automated methods Process furnace/heater Process furnaces or heaters are: combustion units whose flue-gases are used for the thermal treatment of objects or feed material through direct contact, e.g. in drying processes or chemical reactors; or combustion units whose radiant and/or conductive heat is transferred to objects or feed material through a solid wall without using an intermediary heat transfer fluid, e.g. furnaces or reactors heating a process stream used in the (petro-)chemical industry such as steam cracker furnaces. It should be noted that, as a consequence of the application of good energy recovery practices, some of the process furnaces/heaters may have an associated steam/electricity generation system. This is considered to be an integral design feature of the process furnace/heater that cannot be considered in isolation. Process off-gas The gas leaving a process which is further treated for recovery and/or abatement NOX The sum of nitrogen monoxide (NO) and nitrogen dioxide (NO2), expressed as NO2 Residues Substances or objects generated by the activities covered by the scope of this document, as waste or by-products RTO Regenerative thermal oxidiser SCR Selective catalytic reduction SMPO Styrene monomer and propylene oxide SNCR Selective non-catalytic reduction SRU Sulphur recovery unit TDA Toluene diamine TDI Toluene diisocyanate TDI plant Plant for the production of TDI from TDA via phosgenation TOC Total organic carbon, expressed as C; includes all organic compounds (in water) Total suspended solids (TSS) Mass concentration of all suspended solids, measured via filtration through glass fibre filters and gravimetry TVOC Total volatile organic carbon; total volatile organic compounds which are measured by a flame ionisation detector (FID) and expressed as total carbon Unit A segment/subpart of a plant in which a specific process or operation is carried out (e.g. reactor, scrubber, distillation column). Units can be new units or existing units Valid hourly or half-hourly average An hourly (or half-hourly) average is considered valid when there is no maintenance or malfunction of the automated measuring system VCM Vinyl chloride monomer VOCs Volatile organic compounds as defined in Article 3(45) of Directive 2010/75/EU --- Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/n2/division/6 (the official version) Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-n2/division-6 Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.