Process for the production of 1,4-butanediol and tetrahydrofuran

Details Process for the production of 1,4-butanediol and tetrahydrofuran Process for the production of 1,4-butanediol and tetrahydrofuran

1977-11-21

1979-05-22

Raymond, Richard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

568864, C07D30708, C07C 2704

Patent

active

041559193

ABSTRACT:
Process for the catalytic hydrogenolysis of maleic anhydride to give 1,4-butanediol and tetrahydrofuran in a single-stage operation by means of hydrogen under heat and pressure, in the presence of a suspension of a reduced solid catalyst, which contains as catalytically active elements Ni in association with Mo and/or W and optionally with Zr and/or Nb, having the following essential characteristics: (I) double oxidizing treatment of the solid catalyst in two stages before its reduction, and (II) conducting the hydrogenolysis of maleic anhydride at a temperature of from 170.degree. to 215.degree. C. under a hydrogen pressure below about 200 bars, in a reaction medium which contains gamma-butyrolactone, for a time such that the amount of gamma-butyrolactone in the final reaction medium is substantially equal to that present in the initial reaction medium.

REFERENCES:
patent: 2772291 (1956-11-01), McShane et al.
patent: 2772293 (1956-11-01), Gilbert et al.
patent: 3492314 (1970-01-01), Asano et al.
patent: 3890361 (1975-06-01), Kanetaka et al.

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