Water → Maleic Anhydride

HRID 1902574Notes

Reaction equation

HRID 1902574 reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH:3]=[CH:2]1.[OH2:8]>>[C:4]1(=[O:5])[O:6][C:1](=[O:7])[CH:2]=[CH:3]1.[C:1]([OH:6])(=[O:7])/[CH:2]=[CH:3]\[C:4]([OH:8])=[O:5].[C:1]([OH:6])(=[O:7])/[CH:2]=[CH:3]/[C:4]([OH:8])=[O:5]

Participants

5

Reactant 2

HCID 962WaterHCID 7923Maleic Anhydride

Product 3

HCID 7923Maleic AnhydrideHCID 444266Maleic AcidHCID 444972Fumaric Acid

Procedure

In a process for stripping low-boiling impurities from crude maleic anhydride produced by the vapor phase oxidation of a hydrocarbon feedstock; the improvement which comprises, passing the lights stripper overhead vapor containing, by volume, about 1 to 30 percent maleic anhydride and about 10 to 70 percent water, through a condenser system maintained at a temperature in the range of from about 25° C. to 40° C. at less than about 50 millimeters of mercury pressure thereby to obtain solid maleic anhydride having less than 300 ppm of maleic acid and fumaric acid impurities.

Workup

  1. temperaturemaintained at a temperature in the range of from about 25° C. to 40° C. at less than about 50 millimeters of mercury pressure

Sources & evidence

ORD record
ord-f0f6f59f6ba7498e9d30a3f0c2f665b0
Source dataset
uspto-grants-1982_12
Patent number
US04364748

Reaction notes

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