Carboxylic acid production process employing solvent from esterification of lignocellulosic material
First Claim
1. A process for producing an aromatic carboxylic acid, said process comprising oxidizing an oxidation feed comprising at least one oxidizable compound and at least one solvent comprising a monocarboxylic acid, wherein at least a portion of said monocarboxylic acid originated from a wood acetylation process, wherein said solvent further comprises one or more terpenes, wherein said oxidizable compound comprises para-xylene, wherein said carboxylic acid comprises terephthalic acid.
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Abstract
Methods and apparatus for producing a carboxylic acid employing a solvent from esterification of lignocellulosic materials. An acid-containing composition from esterification of lignocellulosic materials can be employed in the oxidation of para-xylene to terephthalic acid. The acid-containing composition can comprise acetic acid, acetic anhydride, and one or more terpenes.
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19 Claims
- 1. A process for producing an aromatic carboxylic acid, said process comprising oxidizing an oxidation feed comprising at least one oxidizable compound and at least one solvent comprising a monocarboxylic acid, wherein at least a portion of said monocarboxylic acid originated from a wood acetylation process, wherein said solvent further comprises one or more terpenes, wherein said oxidizable compound comprises para-xylene, wherein said carboxylic acid comprises terephthalic acid.
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7. A process for producing an aromatic carboxylic acid, said process comprising:
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(a) contacting at least one lignocellulosic material with a compound containing at least one acetyl group to thereby produce an acetylated lignocellulosic material and an acid-containing composition; and (b) introducing at least a portion of said acid-containing composition and an oxidizable compound into a carboxylic acid production process, wherein said acid-containing composition comprises acetic acid;
wherein said acid-containing composition further comprises one or more terpenes in an amount of at least 0.01 weight percent based on the weight of said acetic acid in said acid-containing compositions. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A process for producing an aromatic carboxylic acid, said process comprising oxidizing an oxidizable compound in an oxidation reactor in the presence of at least one solvent comprises acetic acid, wherein said solvent further comprises acetic anhydride in an amount of at least 0.01 weight percent based on the total weight of the solvent;
- wherein said solvent comprises terpenes in a cumulative amount of at least 0.01 weight percent based on the total weight of the solvent.
- View Dependent Claims (14, 15, 16, 17, 18, 19)
Specification