Purifying acrylonitrile for the manufacture of acrylonitrile polymers
AssigneeBASF SE
InventorsHans Wild, Rudolf Jung, Adolf Echte, Johann Zizlsperger, Hermann Gausepohl
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Abstract
Acrylonitrile or monomer mixtures containing acrylonitrile are purified by treating them with alkaline reacting compounds followed by distillation. The products are particularly suitable for the manufacture of acrylonitrile polymers showing improved color stability.
Claims16
A process for the purification of monomeric acrylonitrile or an acrylonitrile-containing monomer mixture to be used in the manufacture of an acrylonitrile polymer, which process comprises treating said monomeric acrylonitrile or a mixture of acrylonitrile and another copolymerizable monomer with an alkaline-reacting compound, and then distilling under a pressure of from 20 to 150 mm of Hg and at a temperature of from 15 to 90.degree. C.
A process for the purification of a monomeric mixture containing styrene and acrylonitrile to be used in the manufacture of a styrene/acrylonitrile copolymer, which process comprises treating said monomeric mixture of styrene and acrylonitrile with an alkaline-reacting compound and then distilling the treated mixture.
Dependencies are inferred from the claim text.