Phase transfer catalyst recovery

Details Phase transfer catalyst recovery Phase transfer catalyst recovery

1990-05-07

1991-07-09

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564281, C07C20986

Patent

active

050307576

ABSTRACT:
A quaternary ammonium salt catalyst is recovered from mixtures where the salt is in contact with an aqueous alkaline phase by adding water to completely dissolve the salt and adding base to cause the dissolved catalyst to separate as a hydroxide which forms an oily upper phase.

REFERENCES:
patent: 3148214 (1964-09-01), Smith
patent: 3523967 (1970-08-01), Dewar et al.
patent: 3579581 (1971-05-01), Maloney et al.
patent: 3992432 (1976-11-01), Napler et al.
patent: 4172782 (1979-10-01), Masuko et al.
patent: 4489698 (1984-12-01), Idel et al.
"Preliminary Study on the Role Played by the Third Liquid Phase in Phase Transfer Catalysis" by Der-Her Wang and Hung-Shan Weng, Chemical Engineering Science, vol. 43, No. 8, pp. 2019-2024, 1988.

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