Methacrylic Acid → Methacrylic anhydride

HRID 128839Notes

Reaction equation

HRID 128839 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-594dee8f56d74f84864d7c00003627d4
Source dataset
uspto-grants-1995_11
Patent number
US05464911

Reaction notes

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