Method of producing poly(ortho-methylphenol)

Details Method of producing poly(ortho-methylphenol) Method of producing poly(ortho-methylphenol)

2008-01-22

2008-01-22

Eyler, Yvonne (Department: 1621)

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

Organic compounds

Sulfonic acids or salts thereof

Reexamination Certificate

active

11671901

ABSTRACT:
Poly(ortho-methylphenol) is obtainable at high purities and yields using industrial processes by causing a secondary amine and formaldehyde to react with a polyphenol (first step), and then breaking down the aminomethyl group of the obtained poly(ortho-aminomethyl)phenol by means of hydrogenolysis in the presence of a hydrogenation catalyst (second step).

REFERENCES:
patent: 49-55635 (1974-05-01), None
patent: 2003-238470 (2003-08-01), None
Hubacher (Journal of the American Chemical Society (1961) vol. 61, p. 2664).
Max H. Hubacher, “3,3′- Dimethyl-4,4′-dihydroxybenzophenone,” Journal of American Chemical Society vol. 61, 1961 pp. 2664-2665.
M. Gombero, et al., 31, 32, 33-Trimethyl-Aurin (Ortho-Cresaurin) and 31, 32, 33—Trimethyl-N1, N2, N3—Triphenyl-Para-Rosaniline (Triphenyl-Ros-Ortho-Toluidine), Journal of American Chemical Society vol. 47, Jul. 1925 pp. 2022-2033.

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