Purification of tertiary amines using an adsorbent

Details Purification of tertiary amines using an adsorbent Purification of tertiary amines using an adsorbent

1979-08-08

1981-03-10

Doll, John

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

Organic compounds

Amino nitrogen containing

C07C 8526

Patent

active

042553563

ABSTRACT:
A method of purifying tertiary amines by removing sec. and prim. amines and/or their hydrochlorides produced in the manufacture of the tertiary amines. The impurities are removed by dissolving the impure tertiary amines in an organic solvent and the resulting solution is passed over absorbents such as aluminum oxides having a specific surface area of about 100 to 400 square meters per gram. The sec. and prim. amines and/or their hydrochlorides are retained on the adsorbents and pure tertiary amines are useful in the solvents or can be separated therefrom. The adsorbents are regenerated by passing polar solvents thereover to remove the sec. and prim. amines and/or their hydrochlorides.

REFERENCES:
patent: 3406204 (1968-10-01), Bathellier et al.
patent: 3855298 (1974-12-01), Bathellier et al.

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