| 摘要 |
The method of the present invention provides a high yield pathway to 2,5-dimethylhexadiene from renewable isobutanol, which enables economic production of renewable p-xylene (and subsequently, terephthalic acid, a key monomer in the production of PET) from isobutanol. In addition, the present invention provides methods for producing 2,5-dimethylhexadiene from a variety of feed stocks that can act as “equivalents” of isobutylene and/or isobutyraldehyde including isobutanol, isobutylene oxide, and isobutyl ethers and acetals. Catalysts employed in the present methods that produce 2,5-dimethylhexadiene can also catalyze alcohol dehydration, alcohol oxidation, epoxide rearrangement, and ether and acetal cleavage. |
| 主权项 |
1. A method for preparing xylenes, comprising:
a. providing a feedstock comprising isobutanol; b. at least partially oxidizing a portion of said isobutanol to form a first stream comprising isobutyraldehyde and isobutanol; c. coupling said isobutyraldehyde with isobutylene to form a second stream comprising 2,5-dimethyl-2,4-hexadiene; and d. dehydrocyclizing said 2,5-dimethyl-2,4-hexadiene to form a product stream comprising said xylenes.
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