Process for the recovery and reuse of heavy metal oxidation cata

Details Process for the recovery and reuse of heavy metal oxidation cata Process for the recovery and reuse of heavy metal oxidation cata

1981-12-01

1984-08-07

Konopka, P. E.

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Treating with a liquid or treating in a liquid phase,...

502 28, 560 77, 560 78, B01J 3140, C07C 6982

Patent

active

044644779

ABSTRACT:
A process for the recovery and reuse of heavy metal oxidation catalyst from residues in the Witten DMT process by extraction, which involves mixing and settling of the residue with water or dilute aqueous solutions of water-soluble, low-molecular, aliphatic monocarboxylic acids at 70.degree.-160.degree. C. and recycling of the extract of the high-boiling distillation residues into the DMT process. The high-boiling distillation residue and the extractant are used in a quantitative ratio of 1:0.9 to 1:0.1, preferably 1:0.5 to 1:0.3.

REFERENCES:
patent: 3914287 (1975-10-01), Takeda et al.
patent: 4092481 (1978-05-01), Bunger et al.
patent: 4096340 (1978-06-01), Fujii et al.
patent: 4126755 (1978-11-01), Bunger et al.
patent: 4353810 (1982-10-01), Wendle, Jr.
patent: 4372875 (1983-02-01), Bunger et al.
Chemical Engineers' Handbook, J. H. Perry, McGraw-Hill Book Co. Inc., N.Y., 1950, Third Edition, pp. 716-718.

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