Carbonate production

Details Carbonate production Carbonate production

1984-09-10

1986-04-15

Daus, Donald G.

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

Organic compounds

Carbonate esters

210691, C07C 6806, C07C 6808

Patent

active

045826455

ABSTRACT:
A solution of a di-alkyl carbonate, e.g. dimethyl carbonate, in the corresponding alcohol, e.g. methanol, is concentrated by contacting the solution with a hydrophobic zeolite e.g. silicalite. The di-alkyl carbonate is absorbed preferentially. Where the solution also contains water, e.g. as in the case of the products from certain di-alkyl carbonate synthesis reactions, the water can be removed using a hydrophilic zeolite prior to recycle of the alcohol.

REFERENCES:
patent: 2834799 (1958-04-01), Sowa
patent: 3952045 (1976-04-01), Gaenzler et al.
patent: 4213913 (1980-07-01), de Rosset
patent: 4218391 (1980-08-01), Romano et al.
patent: 4257885 (1981-03-01), Grose et al.
patent: 4309281 (1982-01-01), Dessau
patent: 4327035 (1982-04-01), Heitz et al.
Flanigen et al.: "Silicalite, A New Hydrophobic Crystalline Silica Molecular Sieve", Nature, vol. 271, Feb. 9, 1978, pp. 512-516.
Yamazaki et al.: "Polycarbonate, -Urethane and -Urea from Carbon Dioxide and Carbonates", Polymer Preprints, 20 (1979), pp. 146-149.

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