Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1990-09-06
1992-01-21
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
556439, 556430, C07F 708
Patent
active
050829599
ABSTRACT:
An improved process is disclosed for preparation of silicon-containing aromatic polyacids by liquid phase oxidation of a silyl compound in the presence of oxygen and a catalyst comprising cobalt-manganese-bromine. 2-Trimethylsilyl-p-xylene is oxidized to 2-trimethylsilyl-terephthalic acid; 5-trimethylsilyl-m-xylene is oxidized to 5-trimethylsilyl-isophthalic acid, 2,5-bis (trimethylsilyl)-p-xylene is oxidized to 2,5-bis (trimethylsilyl)-terephthalic acid; 5-trimethylsilyl-pseudocumene is oxidized to 1,2,4-tricarboxy-5-trimethylsilyl benzene; and 1,3-bis-(p-tolyl)-tetramethyl-disiloxane is oxidized to 1,3-bis(p-carboxyphenyl)-tetramethyl-disiloxane.
REFERENCES:
patent: 4940810 (1990-07-01), Yokelson et al.
Ernst Andreas B.
Gipe Robert K.
Yokelson Howard B.
Amoco Corporation
Blumberg Gunar J.
Magidson William H.
Medhurst Ralph C.
Shaver Paul F.
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