Maleic Anhydride → Maleic Acid

HRID 583575Notes

Reaction equation

HRID 583575 reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH:3]=[CH:2]1.[C:8]([OH:15])(=[O:14])/[CH:9]=[CH:10]/[C:11]([OH:13])=[O:12]>O>[C:8]([OH:15])(=[O:14])/[CH:9]=[CH:10]/[C:11]([OH:13])=[O:12].[C:1]([OH:6])(=[O:7])/[CH:2]=[CH:3]\[C:4]([OH:12])=[O:5]

Participants

5

Reactant 2

HCID 7923Maleic Anhydride2×HCID 444972Fumaric Acid2×

Product 2

HCID 444266Maleic AcidHCID 444972Fumaric Acid

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

adding water to the dehydrator bottoms stream to convert a portion of the maleic anhydride to fumaric acid and then cooling the dehydrator bottoms stream comprising molten maleic anhydride, entrainer, and fumaric acid to a temperature of about 250° F. to about 310° F. to precipitate the fumaric acid and form a slurry of fumaric acid in molten maleic acid;

Workup

  1. temperaturecooling the dehydrator
  2. customto a temperature of about 250° F. to about 310° F.
  3. customto precipitate the fumaric acid

Sources & evidence

ORD record
ord-9c30cd0d382b4ac08bf5f0b46712d3ed
Source dataset
uspto-grants-1999_07
Patent number
US05929255

Reaction notes

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