Cycloalkanone composition
AssigneeKao Corporation
InventorKoji Mine
Life of this patent
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Abstract
The present invention relates to a cycloalkanone composition which contains cycloalkanone (1) in an amount of 70 wt % or more based on the composition, wherein the content of a dimer of a cycloalkanone represented by formula (2) is 0.055 or less in terms of weight ratio to the cycloalkanone (1), a process for producing the same, a process for producing a composition containing alkyl acetate (5) by using the cycloalkanone composition, and an alkyl acetate composition obtained by the process wherein n is an integer of 1 or 2, R1 and R2 each represent H, a C1 to C8 alkyl group etc., and R3 represents a C1 to C3 alkyl group.
Claims7
A process for producing a cycloalkanone composition comprising a cycloalkanone represented by formula (1) in an amount of 70 wt % or more based on the composition, wherein the content of a dimer of a cycloalkanone represented by formula (2) is 0.055 or less in terms of weight ratio to the cycloalkanone (1),
- in which said process comprises:
- reacting the cycloalkanone represented by formula (2) with an aldehyde or ketone represented by formula (3) by aldol condensation in the presence of water and a basic catalyst at a mole ratio of water/compound of formula (3) of 1.5/1 to 5.5/1,
- wherein n is an integer of 1 or 2, R1 and R2 independently represent a hydrogen atom, a C1 to C8 linear or branced alkyl grou or a substituted or unsubstituted aryl group.
A process for producing an alkyl acetate composition comprising an alkyl acetate represented by formula (5):
- wherein n is an integer of 1 or 2, R1 and R2 independently represent a hydrogen atom, a C1 to C8 linear or branched alkyl group or a substituted or unsubstituted aryl group, and R3 represents a C1 to C3 linear or branched alkyl group, in which said process comprises:
- subjecting a cycloalkanone composition to a dehydration reaction to obtain a product composition,
- wherein the cycloalkanone composition comprises a cycloalkanone represented by formula (1) in an amount of 70 wt % or more based on the composition, wherein the content of a dimer of a cycloalkanone represented by formula (2) is 0.055 or less in terms of weight ratio to the cycloalkanone (1),
- then
- subjecting the product composition to an isomerization reaction in order to obtain an isomerization product, then
- reacting the isomerization product with a malonic diester represented by formula (4) in order to obtain a product:
- wherein R3 has the same meaning as defined above and two R3s maybe the same as or different from each other,
- and reacting the product with water.
Dependencies are inferred from the claim text.