Method and apparatus for purifying acrylic acid, and acrylic aci

Details Method and apparatus for purifying acrylic acid, and acrylic aci Method and apparatus for purifying acrylic acid, and acrylic aci

1994-03-22

1996-04-02

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5142

Patent

active

055042473

ABSTRACT:
A method of purifying acrylic acid by fractional crystallization is provided. The method includes the steps of subjecting an acrylic acid containing mixture to a dynamic crystallization stage to recover purified acrylic acid, leaving a residue containing acrylic acid; subjecting the residue to a static crystallization stage to recover an acrylic acid enriched fraction; and recycling the acrylic acid enriched fraction to the dynamic crystallization stage for recovery of purified acrylic acid.

REFERENCES:
patent: 2868830 (1954-10-01), Weedman et al.
patent: 2885431 (1959-05-01), Tarr
patent: 3050952 (1962-08-01), Marwil
patent: 4493719 (1985-01-01), Wintermantel et al.
patent: 4780568 (1988-10-01), Pascoe
Chemical Abstract 90:104686 1978.

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