Isomerization process

Details Isomerization process Isomerization process

1973-08-29

1976-12-07

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 2EA, C07D30789

Patent

active

039962490

ABSTRACT:
The delta-4 isomer of tetrahydrophthalic anhydride is isomerized in the presence of a catalytic amount of palladium and selected acid anhydrides that liquify the normally solid delta-4 isomer at a temperature below its melting point. This permits the isomerization to be effected at relatively low temperatures and in relatively short times to produce a mixture of isomers of tetrahydrophthalic anhydride that is in the liquid state at temperatures in the range of room temperature.

REFERENCES:
patent: 2764597 (1956-09-01), Barney
patent: 3169975 (1965-02-01), Schulz
patent: 3341555 (1967-09-01), Wooster et al.
patent: 3487092 (1969-12-01), Cheng et al.
patent: 3647701 (1972-03-01), Robinson et al.
Shriner et al., The Systematic Identification of Organic Compounds, Fifth Edition, New York, John Wiley, 28-29.

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