C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/496.8
C07C 67/58 (2006.01) C07C 69/54 (2006.01)
Patent
CA 1332744
ABSTRACT OF THE DISCLOSURE A process for purifying methyl methacrylate which comprises treating methyl methacrylate having a purity of 99.5% or more containing a trace of impurities with one or more sulfonic acid group-containing compounds. According to the present invention, there can be obtained highly purified methyl methacrylate which exhibits an absorbance of 0.02 or less in a range of wavelength of 400 - 500 nm according to the sulfuric acid color method and is free of even a trace of furan-type compounds.
599924
Kobayashi Masao
Okamura Kouhei
Yoshioka Teruhiko
Gowling Lafleur Henderson Llp
Mitsubishi Rayon Co. Ltd.
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