{
  "url": "https://openlegislation.uk/eu-decision-2017-2117/annex/division-3/division-3.4/division-BAT",
  "json_url": "https://openlegislation.uk/eu-decision-2017-2117/annex/division-3/division-3.4/division-BAT.json",
  "legislation": "eudn/2017/2117",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2017-2117",
  "path": "annex/division/3/division/3.4/division/BAT",
  "kind": "division",
  "number": "BAT 29:",
  "heading": "In order to use energy efficiently when using distillation, BAT is to use one or a combination of the techniques given below.",
  "text": "Technique\nDescription\nApplicability\na.\nDistillation optimisation\nFor each distillation column, the number of trays, reflux ratio, feed location and, for extractive distillations, the solvents to feed ratio are optimised\nApplicability to existing units may be restricted by design, space availability and/or operational constraints\nb.\nRecovery of heat from column overhead gaseous stream\nReuse condensation heat from the toluene and the xylene distillation column to supply heat elsewhere in the installation\nc.\nSingle extractive distillation column\nIn a conventional extractive distillation system, the separation would require a sequence of two separation steps (i.e. main distillation column with side column or stripper). In a single extractive distillation column, the separation of the solvent is carried out in a smaller distillation column that is incorporated into the column shell of the first column\nOnly applicable to new plants or major plant upgrades.\nApplicability may be restricted for smaller capacity units as operability may be constrained by combining a number of operations into one piece of equipment\nd.\nDistillation column with a dividing wall\nIn a conventional distillation system, the separation of a three-component mixture into its pure fractions requires a direct sequence of at least two distillation columns (or main columns with side columns). With a dividing wall column, separation can be carried out in just one piece of apparatus\ne.\nThermally coupled distillation\nIf distillation is carried out in two columns, energy flows in both columns can be coupled. The steam from the top of the first column is fed to a heat exchanger at the base of the second column\nOnly applicable to new plants or major plant upgrades.\nApplicability depends on the set-up of the distillation columns and process conditions, e.g. working pressure",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2017/2117/annex/division/3/division/3.4/division/BAT",
    "retrieved_at": "2026-11-01T15:13:18.480772+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}