Process for the preparation of chloroformic acid aryl esters and

Details Process for the preparation of chloroformic acid aryl esters and Process for the preparation of chloroformic acid aryl esters and

1976-09-28

1978-04-18

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 6802

Patent

active

040851290

ABSTRACT:
A process for the preparation of chloroformic acid aryl-esters and cyclic carbonates of aryl compounds containing at least two phenolic hydroxy groups wherein aromatic compounds containing one or more hydroxy groups linked to an aromatic nucleus, are reacted with phosgene in the presence of catalytic amounts of N,N-disubstituted acid amide either under pressure or without pressure while removing the hydrogen chloride continuously from the reaction mixture. This improved process results in almost quantitative or very high yields of pure products and avoids problems such as disposal of waste water.

REFERENCES:
patent: 3170946 (1965-02-01), Kilsheimer et al.
patent: 3211774 (1965-10-01), Stephens
patent: 3211776 (1965-10-01), Stephens
patent: 3255230 (1966-06-01), Kurkjy et al.
Kirk-Othmer, Encyclopedia of Chem. Technology, 2nd ed., vol. 4, Interscience Publishers, N.Y. (1964), p. 386.
Cotter et al., Chemistry & Industry, pp. 791-793, 5/8/65.

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