Purification of crude (meth)acrylic acid

Details Purification of crude (meth)acrylic acid Purification of crude (meth)acrylic acid

1994-11-23

1996-01-09

Bascomb, Jr., Wilbur

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203DIG21, 203 59, 562600, B01D 334, C07C 5144

Patent

active

054825970

ABSTRACT:
In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.

REFERENCES:
patent: 3725208 (1973-04-01), Maezawa et al.
patent: 3893895 (1975-07-01), Dehnert et al.
patent: 4828652 (1989-05-01), Schropp
patent: 5196578 (1993-03-01), Kuragano et al.

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