Process for preparing p-xylene and propylene from mixed alcohol ethers

[0012] Example 1

[0013] Put ZSM-5 molecular sieve and ZSM-11 molecular sieve in sodium hydroxide solution for primary immersion modification, the mass concentration of sodium hydroxide solution is 5%, the temperature of primary immersion modification is 30~35℃, duration is 2.5 h, then use the acidic modification solution for secondary immersion modification in the kettle body. The acidic modification solution is a mixed aqueous solution of hydrochloric acid and fluorosilicic acid. The content of hydrochloric acid in the mixed aqueous solution is 2% (mass concentration, the same below), The content of fluorosilicic acid is 6%, the temperature of the secondary impregnation modification is 110℃, the duration is 2.5h, and the internal pressure of the sealed vessel is controlled to 0.25MPa. After the secondary impregnation modification, ZSM-5 molecular sieve and ZSM-11 molecular sieve are recovered and combined Wash and dry; mix ZSM-5 molecular sieve, ZSM-11 molecular sieve and clay ac

[0016] Example 2

[0017] Put ZSM-5 molecular sieve and ZSM-11 molecular sieve in sodium hydroxide solution for primary immersion modification, the mass concentration of sodium hydroxide solution is 5%, the temperature of primary immersion modification is 30~35℃, duration is 2.5 h, then use the acidic modification solution for secondary immersion modification in the kettle body. The acidic modification solution is a mixed aqueous solution of hydrochloric acid and fluorosilicic acid. The content of hydrochloric acid in the mixed aqueous solution is 2% (mass concentration, the same below), The content of fluorosilicic acid is 6%, the temperature of the secondary impregnation modification is 110℃, the duration is 2.5h, and the internal pressure of the sealed vessel is controlled to 0.25MPa. After the secondary impregnation modification, ZSM-5 molecular sieve and ZSM-11 molecular sieve are recovered and combined Wash and dry; mix ZSM-5 molecular sieve, ZSM-11 molecular sieve and clay ac

[0020] Example 3

[0021] Put ZSM-5 molecular sieve and ZSM-11 molecular sieve in sodium hydroxide solution for primary immersion modification, the mass concentration of sodium hydroxide solution is 5%, the temperature of primary immersion modification is 30~35℃, duration is 2.5 h, then use the acidic modification solution for secondary immersion modification in the kettle body. The acidic modification solution is a mixed aqueous solution of hydrochloric acid and fluorosilicic acid. The content of hydrochloric acid in the mixed aqueous solution is 2% (mass concentration, the same below), The content of fluorosilicic acid is 6%, the temperature of the secondary impregnation modification is 110℃, the duration is 2.5h, and the internal pressure of the sealed vessel is controlled to 0.25MPa. After the secondary impregnation modification, ZSM-5 molecular sieve and ZSM-11 molecular sieve are recovered and combined Wash and dry; mix ZSM-5 molecular sieve, ZSM-11 molecular sieve and clay ac