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(11) | EP 0 839 891 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Process for obtaining aromatic oils having a polycyclic aromatics content of less than 3% which are useful as process oils |
| (57) Process for obtaining aromatic oils having a polycyclic aromatic compounds content
of less than 3 %, useful as rubber extenders, from the mixed extract flow obtained
in the manufacture of lubricant bases, which comprises cooling the flow of mixed extracts
to render non-polyaromatic components insoluble, settling to bring about separation
of the bases, total or partial redissolution in solvent of the light phase obtained
in said settling, cooling to effect separation of the non-polyaromatic components,
and settling to recover the light phase having a low polyaromatic compound content.
A hydrocarbonated stream, having an initial boiling point greater than 200°C, to regulate
the solvent/solute rate and increase the production capacity of aromatic oils with
a PCA content of less than 3%, may be added to the starting mixed extract flow. |