Purification of N-vinylpyrrolidone by crystallization

Details Purification of N-vinylpyrrolidone by crystallization Purification of N-vinylpyrrolidone by crystallization

1996-09-09

1998-01-20

McKane, Joseph K.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548555, C07D20708

Patent

active

057102848

ABSTRACT:
In a process for purifying N-vinylpyrrolidone by crystallization in a crystallizer, those surfaces of the crystallizer from which crystals grow during the crystallization are covered with an N-vinylpyrrolidone seed layer before the crystallization.

REFERENCES:
patent: 3597164 (1971-08-01), Ab-Der-Halden et al.
patent: 4873336 (1989-10-01), Liu et al.
patent: 5039817 (1991-08-01), Kroker et al.
patent: 5329021 (1994-07-01), Cohen et al.

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