Maleic Anhydride → Gamma-Butyrolactone

HRID 1614413Notes

Reaction equation

HRID 1614413 reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH:3]=[CH:2]1.[C:8]([OH:15])(=O)/[CH:9]=[CH:10]\[C:11]([OH:13])=O.[H][H]>>[C:4]1(=[O:5])[O:6][C:1](=[O:7])[CH2:2][CH2:3]1.[C:11]1(=[O:13])[O:15][CH2:8][CH2:9][CH2:10]1

Participants

5

Reactant 3

HCID 7923Maleic AnhydrideHCID 444266Maleic AcidHCID 178418361HCID 178418361, compound

Product 2

HCID 7302Gamma-ButyrolactoneHCID 7922Succinic anhydride

Procedure

Maleic anhydride is hydrogenated to produce 1,4-butanediol in a two-stage process. In the first stage maleic anhydride and/or maleic acid contacted with hydrogen at a temperature of about 100° C. to about 350° C. in the presence of a suitable hydrogenation catalyst to produce succinic anhydride and/or gamma-butyrolactone. In the second stage, the succinic anhydride and/or gamma-butyrolactone and hydrogen are contacted at a temperature of about 180° C. to about 350° C. in the presence of a ruthenium-containing hydrogenation catalyst to produce 1,4-butanediol.

Sources & evidence

ORD record
ord-f3d2d5ca915946f3871fa690485b642e
Source dataset
uspto-grants-1993_03
Patent number
US05196602

Reaction notes

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