Method for extraction solvent recovery

Details Method for extraction solvent recovery Method for extraction solvent recovery

1983-12-19

1985-10-22

Gantz, D. E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

203 6, 203 33, 203 43, 208 8LE, 208 45, 570117, 570121, 570178, 585240, C10G 104

Patent

active

045487014

ABSTRACT:
A method for recovery of extraction solvent from a dissolved solute wherein halogen gas evolution and halogen compound retention in the solute are minimized comprises heating a solution of a halogenated organic solvent and the extracted solute in the presence of an ammonium, Group I metal or Group II metal salt of an acid of carbon number 1 to 6, such as ammonium bicarbonate, ammonium carbonate, ammonium formate, sodium carbonate, sodium formate, or calcium formate, to recover the solvent and the solute.

REFERENCES:
patent: 2280794 (1942-04-01), Cass
patent: 2589212 (1952-03-01), Agapelus et al.
patent: 2653904 (1953-09-01), Hanna et al.
patent: 3846253 (1974-11-01), Obrecht
patent: 4046669 (1977-09-01), Blaine et al.
patent: 4055480 (1977-10-01), Smith et al.
patent: 4057485 (1977-11-01), Blaine et al.

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