# Commission Implementing Decision of 9 October 2014 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for the refining of mineral oil and gas (notified under document C(2014) 7155) (Text with EEA relevance) (2014/738/EU), Division BAT 22: In order to prevent and reduce the emissions of hazardous substances to air and water from base oil production processes, BAT is to use one or a combination of the techniques given below.

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

Technique
Description
Applicability
(i)
Closed process with a solvent recovery
Process where the solvent, after being used during base oil manufacturing (e.g. in extraction, dewaxing units), is recovered through distillation and stripping steps.
See Section 1.20.7
Generally applicable
(ii)
Multi-effect extraction solvent-based process
Solvent extraction process including several stages of evaporation (e.g. double or triple effect) for a lower loss of containment
Generally applicable to new units.
The use of a triple effect process may be restricted to non-fouling feed stocks
(iii)
Extraction unit processes using less hazardous substances
Design (new plants) or implement changes (into existing) so that the plant operates a solvent extraction process with the use of a less hazardous solvent: e.g. converting furfural or phenol extraction into the n-methylpyrrolidone (NMP) process
Generally applicable to new units.
Converting existing units to another solvent-based process with different physico-chemical properties may require substantial modifications
(iv)
Catalytic processes based on hydrogenation
Processes based on conversion of undesired compounds via catalytic hydrogenation similar to hydrotreatment.
See Section 1.20.3 (Hydrotreatment)
Generally applicable to new units

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Source: https://www.legislation.gov.uk/eudn/2014/738/annex/division/3/division/1.3/division/BAT (the official version)
Page: https://openlegislation.uk/eu-decision-2014-738/annex/division-3/division-1.3/division-BAT
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.