Transition metal element modified MTW structure-containing eutectic catalyst as well as preparation method and application thereof
A transition metal element and catalyst technology, which is applied in the field of transition metal element modified eutectic catalyst containing MTW structure and its preparation, can solve the problems of low metal dispersibility and cumbersome process, so as to improve the conversion rate and overcome the cumbersome process. Effect
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Embodiment 1
[0025] 1. Put MTW / MOR eutectic molecular sieve into 0.75mol / L citric acid solution, 85℃
[0026] Stir at constant temperature for 1 hour, then filter with suction, and dry at 100°C for 5 hours;
[0027] 2. Put the MTW / MOR eutectic molecular sieve treated in the above steps into 1.5mol / L ammonium nitrate solution, perform ammonium ion exchange at 80°C for 4 hours, then wash, filter, and dry at 80°C, repeat the above operation three times , roasting the dried molecular sieve at 530°C for 4 hours to obtain H-type MTW / MOR eutectic molecular sieve;
[0028] 3. Put the above H-type MTW / MOR eutectic molecular sieve into 0.9mol / L ferric nitrate solution for ion exchange at 80°C for 4h, then wash, filter, dry at 80°C, and roast at 550°C for 4h.
[0029]The obtained transition metal element-modified eutectic catalyst containing MTW structure, the main body is MTW / MOR eutectic molecular sieve, and the catalyst contains 96% of MTW / MOR eutectic molecular sieve, 0.03% of sodium element, an...
Embodiment 2
[0031] 1. Put MTW / BEA eutectic molecular sieve into 0.3mol / L hydrochloric acid solution, stir at 85°C for 2h, then filter with suction, and dry at 89°C for 3h;
[0032] 2. Put the MTW / BEA eutectic molecular sieve treated in the above steps into a 1.5mol / L ammonium sulfate solution, soak in ammonium at 90°C for 2 hours, then wash, filter, and dry at 80°C. Repeat the above operation three times. The dried molecular sieve was calcined at 550°C for 4 hours to obtain H-type MTW / BEA eutectic molecular sieve;
[0033] 3. Put the above H-type MTW / BEA eutectic molecular sieve into 0.25mol / L cobalt nitrate solution for ion exchange at 85°C for 4h, then wash, filter, dry at 80°C, and roast at 550°C for 4h.
[0034] The obtained transition metal element-modified MTW / BEA eutectic molecular sieve catalyst is a MTW / BEA eutectic molecular sieve. In terms of mass percentage, the catalyst contains 95% of MTW / BEA eutectic molecules, 0.0001% of sodium elements, and 2.4% of cobalt elements. %; Th...
Embodiment 3
[0036] 1. Put MTW / BEA eutectic molecular sieve into 1mol / L citric acid solution, stir at 80°C for 0.2h, then suction filter, and dry at 80°C for 4h;
[0037] 2. Put the MTW / BEA eutectic molecular sieve treated in the above steps into a 0.6mol / L ammonium chloride solution, heat at 80°C for 3 hours, then wash, filter, and dry at 80°C, repeat the above operation three times, Calcining the dried molecular sieve at 550°C for 4 hours to obtain H-type MTW / BEA eutectic molecular sieve;
[0038] 3. Put the above H-type MTW / BEA eutectic molecular sieve into 1mol / L nickel chloride solution for ion exchange at 80°C for 4h, then wash, filter, dry at 80°C, and roast at 550°C for 4h.
[0039] The obtained transition metal element-modified MTW / BEA eutectic molecular sieve catalyst has a body of MTW / BEA eutectic molecular sieve. In terms of mass percentage, the catalyst contains 80.3% of MTW / BEA eutectic molecular sieve, 0.003% of sodium element, and 2.1% of nickel element. %; The specific su...
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