Process for recovery of amine from spent acid stripping liquor

Details Process for recovery of amine from spent acid stripping liquor Process for recovery of amine from spent acid stripping liquor

1982-08-20

1984-09-18

Sever, Frank

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 75, 203 77, 203 78, 203 80, 203 82, 203 84, 203 94, 203 98, 564499, B01D 334

Patent

active

044722460

ABSTRACT:
Disclosed is a process for recovering a virtually water-free amine from an amine acid salt thereof. The process comprises a unique combination of phase separation stages practiced under mild heating and distillation stages. An amine product containing less than 0.2% water can be achieved by the present process. The feedstock for the process suitably is an acid scrub liquor used to scrub amine from a vapor stream thereof which has been used in a cold-box molding process in the foundry industry or in the cure of vapor permeation curable coatings in the coatings industry.

REFERENCES:
patent: 3536533 (1970-10-01), Hurley et al.

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