A kind of in situ activation method of catalyst
A catalyst and in-situ technology, applied in catalyst regeneration/reactivation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of short catalyst operation period, low yield of target product, frequent regeneration, etc., and prolong online operation time , Improve the selectivity of propylene and prolong the service life
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Embodiment 1
[0039] This example illustrates the process of the first in-situ online activation treatment in the first reaction cycle and the corresponding reaction results.
[0040] The deactivated MTP catalyst in the above Comparative Example 1 was not regenerated by normal charcoal burning, but was activated online by using an aromatic hydrocarbon-containing reactivator feed.
[0041] Following the evaluation of Comparative Example 1, the temperature of the MTP catalyst bed was controlled to be 465±5°C. Adopt toluene (analytically pure, Tianjin Kemiou Chemical Reagent Co., Ltd.) as revitalizing agent, space velocity 1h -1 , Normal pressure reaction 24h. Then return to the normal feeding of 50% (heavy) methanol aqueous solution, and adjust the temperature of the MTP reactor to be 480±5° C. at the same time. According to methanol space velocity 1.0h -1 Evaluate the conversion rate, the methanol conversion rate rises to over 99% within 24 hours of switching the feed, after that, the met...
Embodiment 2
[0044] This example illustrates the process of the second in-situ on-line activation treatment in the first reaction cycle and the corresponding reaction results.
[0045] Following Example 1, the carbon-deposited deactivated MTP catalyst was subjected to online activation treatment for the second time by using an aromatic hydrocarbon-containing reactivating agent feed.
[0046] Following the evaluation of Example 1, the temperature of the MTP catalyst bed was controlled to be 465±5°C. Adopt 1,2,4-trimethylbenzene (98%, Acros) as revitalizing agent, space velocity 1.5h -1 , Normal pressure reaction 16h. Then return to the normal feeding of 50% (heavy) methanol aqueous solution, and adjust the temperature of the MTP reactor to be 480±5° C. at the same time. According to methanol space velocity 1.0h -1 Evaluate the conversion rate, the methanol conversion rate rises to over 99% within 24 hours of switching the feed, after that, the methanol feed space velocity can be increase...
Embodiment 3
[0049] This example illustrates the process of the third in-situ on-line activation treatment in the first reaction cycle and the corresponding reaction results.
[0050] Continuing with Example 2, the carbon-deposited deactivated MTP catalyst was subjected to the third on-line activation treatment using an aromatic hydrocarbon-containing reactivating agent feed.
[0051] Following the evaluation of Example 2, the temperature of the MTP catalyst bed was controlled to be 470±5°C. Gasoline obtained by methanol-to-gasoline (MTG) process (laboratory MTG evaluation retention, containing 33.9% by weight of aromatics, 12.69% by weight of olefins, others are alkanes and cycloalkanes) is used as a rejuvenating agent, and the space velocity is 0.5h -1 , Normal pressure reaction 16h. Then return to the normal feeding of 50% (heavy) methanol aqueous solution, and adjust the temperature of the MTP reactor to be 480±5° C. at the same time. According to methanol space velocity 1.0h -1 Eva...
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