Recovery of monomeric acrylic acid from residues originating fro

Details Recovery of monomeric acrylic acid from residues originating fro Recovery of monomeric acrylic acid from residues originating fro

1975-02-12

1976-05-04

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5100

Patent

active

039548546

ABSTRACT:
Monomeric acrylic acid is recovered from residues originating from processed crude acrylic acid and containing .beta.-acryloyloxypropionic acid, .beta.-acetoxypropionic acid, hydracrylic acid, dihydracrylic acid and polymeric hydracrylic acid. To this end, the residues are heated to temperatures within the range 130.degree. and 250.degree.C under pressures within the range 0.01 and 1 atmosphere absolute in contact with catalysts selected from alkali metal or alkaline earth metal carboxylates, phosphates or borates, or from alkali metal or alkaline earth metal compounds producing carboxylates together with the carboxylic acids being contained in the residues.

REFERENCES:
patent: 2485510 (1949-10-01), Redmon
patent: 3086046 (1963-04-01), Kutepow et al.
patent: 3639466 (1972-02-01), Leichte

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