Preparation of tetrahydrofuran

Details Preparation of tetrahydrofuran Preparation of tetrahydrofuran

1985-02-21

1986-05-13

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30708

Patent

active

045888272

ABSTRACT:
Tetrahydrofuran is prepared from a crude alkaline aqueous solution of butane-1,4-diol, as obtained by reaction of acetylene with aqueous formaldehyde and catylytic hydrogenation of the resulting but-2-yne-1,4-diol solution by a process in which the alkaline solution is first neutralized with sulfuric acid and water is then eliminated in the liquid phase at from 200.degree. to 260.degree. C., under superatmospheric pressure and in the presence of phosphoric acid.

REFERENCES:
patent: 2251292 (1941-08-01), Reppe
patent: 2251835 (1941-08-01), Reppe et al.
patent: 3726905 (1973-04-01), Coates et al.
patent: 3980672 (1976-09-01), Tomomatsu
patent: 4233228 (1980-11-01), Mueller et al.
Reppe et al, Annalen der Chemie, 596, (1955), 81 and 82.

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