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US 6,562,996 B2Granted
Alkyl aromatic aldehydes
AssigneeExxonMobil Chemical Patents Inc.
InventorRamzi Yanni Saleh
Life of this patent
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Abstract
A composition containing isomeric mixtures of arylaldehydes prepared from a mixed alkyl aromatic feedstock. A composition containing isomeric mixtures of dimethylbenzaldehydes prepared from a mixed xylene feedstock using a Gatterman-Koch type reaction. A composition of isomeric mixtures of tolualdehydes prepared from a toluene feedstock using a Gatterman-Koch type reaction.
Claims6
An aromatic acid composition comprising:
- about 80% to about 98% by weight terephthalic acid;
- about 2% to about 10% by weight phthalic acid;
- and
- less than about 3% by weight isophthalic acid.
1 more element
An aromatic acid composition comprising:
- about 80% to about 98% by weight trimellitic acid;
- and
- about 2% to about 10% by weight terephthalic acid.
An alkyl benzaldehyde composition comprising:
- about 32% to about 33% by weight ethyldimethylbenzylaldehyde;
- about 18% to about 20% by weight methylpropylbenzylaldehyde;
- and
- about 20% to about 22% by weight diethyl- and propylethylbenzylaldehyde;
- about 9% to about 10% naphthaldehyde;
- and
- about 0.5% to about 1% butylbenzaldehye;
- wherein the alkyl benzaldehyde composition is produced from contacting an alkyl benzene feedstock with a carbonylation catalyst.
5 more elements
An alkyl napthylaldehyde composition comprising:
- about 50% to about 52% by weight methylnapthylaldehyde;
- about 25% to about 28% by weight dimethylnapthylaldehyde;
- about 11% to about 12% by weight napthaldehyde;
- about 7% to about 8% by weight ethylnapthaldehyde;
- and
- about 5% to about 6% by weight indanecarboxaldehyde and dimethylindanecarboxaldehyde;
- wherein the alkyl napthylaldehyde composition is produced from contacting an alkyl napthalene feedstock with a high boiling point carbonylation catalyst.
4 more elements
Dependencies are inferred from the claim text.