Production method for p-xylene

1. A method for producing p-xylene, comprising:

bringing a first raw material comprising isobutene into contact with a dimerization catalyst to generate C8 components comprising diisobutylene;

bringing a second raw material comprising the C8 components into contact with a dehydrogenation catalyst comprising Pt in the presence of water to obtain a reaction product comprising p-xylene, wherein the amount of water is from 0.1 equivalents to 10 equivalents based on the C8 components in the second raw material; and

collecting p-xylene from the reaction product.

2. The method according to claim 1 , wherein a C8 collected fraction comprising at least one selected from the group consisting of diisobutylene, 2,2,4-trimethylpentane, 2,5-dimethylhexane, 2,5-dimethylhexene and 2,5-dimethylhexadiene is further collected from the reaction product.

3. The method according to claim 2 , wherein the C8 collected fraction is recycled to the second raw material.

4. The method according to claim 1 , wherein a C4 collected fraction comprising at least one selected from the group consisting of isobutene and isobutane is further collected from the reaction product.

5. The method according to claim 4 , wherein the C4 collected fraction is recycled to the first raw material.

6. The method according to claim 1 , wherein the dimerization catalyst comprises at least one acidic catalyst selected from the group consisting of sulfuric acid, zeolite, solid phosphoric acid, hydrofluoric acid, ionic liquids, and ion-exchange resins.

7. The method according to claim 1 , wherein the dehydrogenation catalyst further comprises Sn.