Process for the production of an aromate concentrate suitable fo

Details Process for the production of an aromate concentrate suitable fo Process for the production of an aromate concentrate suitable fo

1988-08-08

1990-05-15

Bascomb, Wilbur

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating the distillation zone

203 27, 203 58, 203 74, 203 75, 203 77, 203 81, 203 82, 585808, 585865, 208312, 208313, 208326, 208355, 208365, B01D 340, C07C 708

Patent

active

049255355

ABSTRACT:
The process for production of an aromate concentrate for use as a blending component for gasification fuel includes subjecting another feed hydrocarbon mixture to an extractive distillation using N-substituted morpholines as selective solvent in a extractive distillation column. Low-boiling non-aromates with a boiling range up to about 105.degree. C. practically completely and higher-boiling non-aromates with a boiling range between about 105.degree. and 160.degree. C. to a substantial extent are discharged as a raffinate from the top of the extractive distillation column. The extract bottoms from the extractive distillation are fed to a solvent stripping column where the solvent is at least partially recovered from other hydrocarbons. To eliminate condensation and polymerization products due to components with a boiling point over 170.degree. C. from the feed hydrocarbon mixture which can impair the process, a feed hydrocarbon mixture which contains those high boiling components is predistilled prior to extractive distillation to remove them. The top product from the predistillation column is fed to the extractive distillation column for extractive distillation. The predistillation residue can then be added to other hydrocarbons to form the aromate concentrate.

REFERENCES:
patent: 2842484 (1958-07-01), Fleck
patent: 3216929 (1965-11-01), Favre
patent: 4410400 (1983-10-01), Preusser et al.
patent: 4488936 (1984-12-01), Preusser et al.
patent: 4586986 (1986-05-01), Preusser et al.
patent: 4595491 (1986-06-01), Berns

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