Methacrylic Acid → Methacrylic anhydride

HRID 1033265Notes

Reaction equation

HRID 1033265 reaction equation
[C:1]([OH:6])(=[O:5])[C:2]([CH3:4])=[CH2:3].[OH-:7].[Na+]>O>[C:1]([O:6][C:3](=[O:7])[C:2]([CH3:4])=[CH2:1])(=[O:5])[C:2]([CH3:4])=[CH2:3]

Participants

4

Reactant 2

HCID 4093Methacrylic AcidHCID 14798Sodium Hydroxide

Product 1

HCID 12974Methacrylic anhydride

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

The 81A product (11.51 gm) was allowed to react under the conditions of Example 1 with 5.28 gm XSA, 9.99 gm methacrylic acid, 2.78 gm AMPS, and 44.50 gm water. After reaction, 6.94 grams of water was added along with NaOH to adjust pH to 4.4 (referred to below as 81B). The solution contained 29% solids.

Sources & evidence

ORD record
ord-4ade0e7e28c14a6f98bbfc1ef9c2af7c
Source dataset
uspto-grants-1994_05
Patent number
US05310828

Reaction notes

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