Process for the preparation of unsymmetric dialkyl carbonates

Details Process for the preparation of unsymmetric dialkyl carbonates Process for the preparation of unsymmetric dialkyl carbonates

1992-05-21

1993-04-27

Higel, Floyd D.

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

Organic compounds

Carbonate esters

558270, 558260, C07C 6996, C07C 6800

Patent

active

052064085

ABSTRACT:
Basic cesium compounds are effective transesterification catalysts for the conversion of symmetric dialkyl carbonates to unsymmetric dialkyl carbonates. Crown ethers, polyalkylene glycols, and polyalkylene glycol ethers are useful cocatalysts for the process. Methyl tert-butyl carbonate and methyl tertamyl carbonate, useful octane enhancers for gasoline, can be prepared using the process.

REFERENCES:
patent: 3227741 (1966-01-01), Fenton
patent: 3642858 (1972-02-01), Frevel et al.
patent: 4181676 (1980-01-01), Buysch et al.

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