# 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 BAT 74:: In order to reduce the amount of organic residues being sent for disposal from the TDI plant, BAT is to use a combination of the techniques given below.

Extent: E+W+S+N.I.

Technique
Description
Applicability
Techniques to prevent or reduce the generation of waste
a.
Minimisation of high-boiling residue formation in distillation systems
See BAT 17b.
Only applicable to new distillation units or major plant upgrades
Techniques to recover organic material for reuse or recycling
b.
Increased recovery of TDI by evaporation or further distillation
Residues from distillation are additionally processed to recover the maximum amount of TDI contained therein, e.g. using a thin film evaporator or other short-path distillation units followed by a dryer.
Only applicable to new distillation units or major plant upgrades
c.
Recovery of TDA by chemical reaction
Tars are processed to recover TDA by chemical reaction (e.g. hydrolysis).
Only applicable to new plants or major plant upgrades

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/9/division/9.3/division/BAT+74 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-9/division-9.3/division-BAT+74
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.