Process for the continuous recovery of thermally unstable solven

Details Process for the continuous recovery of thermally unstable solven Process for the continuous recovery of thermally unstable solven

1976-09-03

1981-04-21

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating feed

203 73, 203 74, 203DIG19, 208 33, 202173, 202174, 202180, 159 17R, 570262, B01D 126, C07C 1902

Patent

active

042631025

ABSTRACT:
In recovering the multi-solvent portion of the oil solvent mixture in a solvent dewaxing process, decomposition of a thermally unstable, lower boiling solvent component is substantially avoided by recovering the solvent in a series of controlled evaporations whereby the major portion of the lower boiling solvent component is removed from the mixture prior to the removal of the remaining portion of the solvent. The solvent removal may be conducted in a high pressure evaporator having an upper section and a lower section separated by an annular tray.

REFERENCES:
patent: 2672434 (1954-03-01), MacFarlane
patent: 3130143 (1964-04-01), Salmon et al.
patent: 3388046 (1968-06-01), Hendrix
patent: 3412016 (1968-11-01), Graven
patent: 3448016 (1969-06-01), Hoppe
patent: 3458431 (1969-07-01), Nixon
Schneider et al.: Hydrocarbon Processing & Petroleum Refiner (vol. 42), #12, pp. 104-106.

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