Cyclic regeneration method of Ti-HSZ (Ti-containing hollownest-structured zeolite) catalyst
A technology for recycling and regenerating catalysts, which is applied in the direction of catalyst regeneration/reactivation, molecular sieve catalysts, chemical instruments and methods, etc. It can solve the problems that have not yet appeared in the method of recycling and regenerating molecular sieves with titanium-containing hollow nest structures, and achieve good catalytic regeneration effect and safety The effect of high performance and high regeneration catalytic activity
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Embodiment 1
[0022] Embodiment 1: a kind of recycling regeneration method of Ti-HSZ catalyst, comprises the steps:
[0023] 1) Recovery of Ti-HSZ catalyst
[0024] Recover the Ti-HSZ catalyst after the olefin epoxidation reaction, filter and dry it, and set it aside;
[0025] 2) Regeneration of Ti-HSZ catalyst
[0026] By step 1) the Ti-HSZ catalyst after recovery treatment gets 1g and mixes with 60.5g regeneration liquid evenly, and wherein regeneration liquid is 30% H by 5.5g concentration 2 o 2 The aqueous solution and 55g of ethanol were prepared, stirred at 25°C for 10 hours, filtered and dried to obtain the regenerated Ti-HSZ catalyst.
Embodiment 2～15
[0028] In Examples 2 to 15, according to the technical proposal provided by the present invention, the ratio of raw materials is adjusted within the given range, and the performance of the obtained products is equivalent, all conforming to the technical idea of the present invention. Implementation process except following difference, all the other are all the same as embodiment 1, see table 1.
[0029] Table 1
[0030]
Embodiment 16
[0031] Example 16: Evaluate the stability of the regenerated Ti-HSZ catalysts obtained in Examples 1-15 by epoxidation of allyl chloride. The catalytic reaction conditions are: 0.25 grams of catalyst, 4.2 grams of acetone, 2.365 grams of allyl chloride, and 3.69 grams of hydrogen peroxide (mass concentration: 26.8%). The specific process is that the catalyst, solvent and reactant are added into the double-necked flask in sequence. under stirring conditions. Divide the hydrogen peroxide into four equal portions. They were added to the reactor successively within 30 minutes, and reacted at 60°C for 8 hours. Afterwards, the catalyst regeneration method in Example 1 was repeated 5 times, and the stability of the catalyst performance after repeated catalysis was counted, and the results are shown in Table 2.
[0032] Table 2
[0033]
[0034] As can be seen from Table 2, the regenerated Ti-HSZ catalyst obtained according to the recycling regeneration method of a Ti-HSZ catal...
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