Methacrylic Acid → Methacrylic Acid
Reaction equation
C(O)(=O)C=C.[C:6]([OH:11])(=[O:10])[C:7]([CH3:9])=[CH2:8]>>[C:6]([OH:11])(=[O:10])[C:7]([CH3:9])=[CH2:8].[CH3:8][C:7](=[CH2:6])[CH3:9]Participants
Procedure
A continuous distillation operation was carried out in a way similar to the example 3.1 except that acrylic acid was changed to methacrylic acid. But an aqueous methacrylic acid solution obtained from a catalytic gas phase oxidation reaction of isobutylene, which contains 37% by weight of methacrylic acid, 9.07% by weight of acetic acid, and 50% by weight of water, was subjected to an extracting operation by n-heptane with an extraction ratio of 1.3. The thus-obtained n-heptane phase containing 76.4% by weight of n-heptane, 21.8% by weight of methacrylic acid, and 1.3% by weight of acetic acid was used as a supplying material. Distillation was carried out under the conditions of temperature at the column top 42° C., temperature at the column bottom 122° C., pressure at the column top 105 mmHg, and refluxing ratio=1.0 (weight standard).
Sources & evidence
- ORD record
- ord-f46fca648d4845f4948eec063910f7f7
- Source dataset
- uspto-grants-1994_12
- Patent number
- US05371280
Reaction notes
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