Preparation of dioxane and co-products

Details Preparation of dioxane and co-products Preparation of dioxane and co-products

1979-06-29

1981-08-11

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

546254, C07D31910

Patent

active

042833396

ABSTRACT:
Dioxane is prepared by reaction of polyethylene glycols in a catalytically active liquid reaction medium comprising a mixture of partial phosphate esters of a polyethylene glycol, and ammonium salts of partial esters of a polyethylene glycol. Along with dioxane, valuable co-products, including the compound 5-ethyl-2-methylpyridine, are formed from which the dioxane is readily separated in highly pure form. The catalytically active liquid reaction medium is derived from the reaction of ammonium dihydrogen phosphate with a polyethylene glycol at temperatures preferably in the range from 190.degree. to 225.degree. C. Temperatures of reaction between the polyethylene glycol and the catalytically active liquid reaction medium to form the dioxane and co-products are preferably in the range of from about 225.degree. C. to about 275.degree. C.

REFERENCES:
patent: 4007095 (1977-02-01), Wolf et al.
Inoue et al., J. Chem. Soc., Japan, (1955).
Fieser, Experiments in Organic Chemistry, p. 368-369.
Chem. Abstracts 50, 15600, (1956).
Chem. Abstracts 33, 1663, (1939).
Chem. Abstracts 44, 2986, (1950).
Chem. Abstracts 47, 3311, (1953).
Chem. Abstracts 49, 2108, (1955).
Chem. Abstracts 50, 13024, (1956).

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