Regeneration method and application of olefin reduction catalyst
An olefin catalyst and catalyst technology, which is applied in the field of regeneration of olefin-reducing catalysts, can solve the problems that catalyst life and good activity cannot be combined
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Embodiment 1
[0078] Mix NaOH, silica sol, sodium aluminate, and HMI (hexamethyleneimine) at 4°C to make a molar ratio of Na 2 O:Al 2 o 3 : SiO 2 :H 2 O=8:0.7:10:100 reaction raw material mixture, stir the above mixture at room temperature, crystallize at 150°C for 35 hours, then filter, dry at 100°C for 24h, and roast at 550°C for 12h to obtain crystalline molecular sieves . Using alumina as binder, molecular sieve and alumina are mixed according to the weight ratio of 7:3, extruded, dried (100°C, 24h), activated, ammonium exchange (the mass concentration of ammonium nitrate solution is 5%) , and calcined at 450°C for 6h to obtain olefin-reducing catalyst 1.
[0079] On the fixed bed reactor, carry out the stability test of reducing olefins, the reaction raw materials include 41.51% of C8 aromatics, 40.76% of C9 aromatics, 16.42% of C10 aromatics, 1.31% of indene, the amount of catalyst is 1g, the reaction temperature is 180 degrees, the pressure 2.0MPa, raw material bromine index 98...
Embodiment 2
[0081] Mix NaOH, silica sol, sodium aluminate, and hexahydropyridine at 8°C to make a molar ratio of Na 2 O:Al 2 o 3 : SiO 2 :H 2 O=8.5:0.7:10:120 reaction raw material mixture, stir the above mixture evenly at room temperature, crystallize at 155°C for 37 hours, then filter, dry at 100°C for 24h, and roast at 550°C for 12h to obtain crystalline molecular sieves . Alumina is used as a binder, molecular sieve and alumina are mixed in a weight ratio of 7:3, extruded into a rod, dried, activated and pressed, and calcined at 480°C for 8 hours to obtain the olefin-reducing catalyst 2.
[0082] The olefin degrading stability test is the same as Example 1, except that the catalyst of this example is used, the results are shown in Table 1, and deactivated catalyst 2 is obtained after the test.
Embodiment 3
[0084] Regenerate the deactivated catalyst 1 of Example 1, wash it with benzene at 150°C for 6h, and space velocity 20h -1 . Afterwards, nitrogen purging was used, and after drying, the temperature was raised to 400° C. for carbonization for 3 hours. After that, raise the temperature to 450°C, feed oxygen-containing gas, the oxygen content is 18%, slowly heat up and roast at 450 to 550°C, the heating rate is not more than 1 degree per minute, and roast until there is no CO 2 Generated to obtain the regenerated catalyst 1.
[0085] The olefin-reducing stability test is the same as in Example 1, except that the regenerated catalyst 1 of this example is used, and the results are shown in Table 1 below. It can be seen from the table that the performance of the catalyst is basically fully restored after regeneration, and has good regeneration performance, thereby prolonging its industrial service life.
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