Preparation method of SSZ-13 molecular sieve for MTO catalytic reaction

[0037] A kind of preparation method for the SSZ-13 molecular sieve of MTO catalytic reaction, comprises the following steps:

[0038] (1) Preparation of Cu-SSZ-13 molecular sieve: the aluminum source, silicon source, sodium source, water and copper amine complex according to 1.0Al 2 o 3 :10~35SiO2 2 :3.0~5.0Na 2 O:200~300H 2 O: 2.0~4.0Cu-TEPA molar ratio mixed at room temperature, stirred with a stirring paddle for 30min, put into a polytetrafluoroethylene-lined steel reaction kettle, reacted at 130℃~175℃ for 96h~144h, reacted After completion, the product was washed with deionized water and dried at 100°C for 12 hours to obtain Cu-SSZ-13 molecular sieve (S1). The silicon source used in this step was water glass, silica sol, silica gel, amorphous SiO 2 Powder, Si(OCH 3 ) 4 and Si(OC 2 h 5 ) 4 One or several mixtures of them, the aluminum source is sodium metaaluminate, pseudoboehmite, amorphous aluminum hydroxide powder and aluminum isopropoxide, and the sodium source is

[0048] Preparation of SSZ-13 molecular sieve with copper amine complex as template

[0049] The preparation of Cu-SSZ-13 molecular sieve: Sodium metaaluminate, water glass, sodium hydroxide, deionized water and copper ammonium complex are according to n(Al 2 o 3 ):n(SiO 2 ):n(Na 2 O):n(H 2 The molar ratio of O):n(Cu-TEPA) is 1:10:3.0:200:2.0, mixed at room temperature, and stirred with a stirring paddle for 30min. Put it into a polytetrafluoroethylene-lined steel reactor and react at 130°C for 96h. After the reaction was completed, the product was washed with deionized water and dried at 100° C. for 12 hours to obtain Cu-SSZ-13 molecular sieve (S1).

[0050] Removal of Cu: Add 2 g of the synthesized S1 sample into 50 mL of ammonium nitrate solution with a concentration of 1 mol / L, ion exchange for 4 h in a water bath at 80 °C, wash, and dry at a constant temperature of 100 °C for 2 h, repeating 3 times. A molecular sieve sample (S2) is obtained.

[0051] Secondary crysta

[0053] Preparation of SSZ-13 molecular sieve with copper amine complex as template

[0054] Preparation of Cu-SSZ-13 molecular sieve: Pseudoboehmite (CP), Si(OCH 3 ) 4 (AR), sodium oxide (AR), deionized water and copper ammonium complex according to n(Al 2 o 3 ):n(SiO 2 ):n(Na 2 O):n(H 2 The molar ratio of O):n(Cu-TEPA) is 1:20:3.5:220:2.5. Mix at room temperature and stir with a stirring paddle for 30min. Put it into a polytetrafluoroethylene-lined steel reactor and react at 140°C for 108h. After the reaction was completed, the product was washed with deionized water and dried at 100° C. for 12 hours to obtain Cu-SSZ-13 molecular sieve (S1).

[0055]Removal of Cu: Add 2 g of the synthesized S1 sample into 50 mL of ammonium chloride solution with a concentration of 1.2 mol / L, ion exchange for 6 h in a water bath at 80 °C, wash, and dry at a constant temperature of 100 °C for 2 h, repeating 3 times. A molecular sieve sample (S2) is obtained.

[0056] Secondary crystalli