A kind of in-situ combined regeneration method of deactivated titanium-silicon molecular sieve catalyst
A titanium-silicon molecular sieve and catalyst technology, which is applied in the field of in-situ combined regeneration of titanium-silicon molecular sieve catalysts, can solve the problems of incomplete regeneration of titanium-silicon molecular sieve, cumbersome operation, and short service life of catalysts.
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Embodiment 1
[0031] 5G inactivated catalyst was filled in a fixed bed reaction tube constant temperature section, 0.5 MPa, 60 ° C for 6 hours, and the amount of feed was 10 g / h. Then, the aqueous oxide solution was introduced, the amount of feed was 5 g / h, and the peroxide mass fraction was 5%, and the treatment time was 12 hours. The aqueous tetramethyl ammonium chloride solution was re-formed, and the amount of feed was 10 g / h, and the mass fraction of tetramethyl chloride was 2%. Processing time 2H. The methanol solvent was subjected to 3 hours, and the amount of feed was 10 g / h. Example A of the titanium silicon molecular sieve catalyst after regeneration was obtained.
Embodiment 2
[0033] The 5G inactivated catalyst was filled in the constant temperature section of the fixed bed reaction tube, from 1.0 MPa, 80 ° C for 12 hours, and the amount of feed was 5 g / h. The peroxide methanol solution was then introduced, the amount of feed was 5 g / h, and the peroxide mass fraction was 10%, and the treatment time was 6 hours. The aqueous solution of 4-.fluated ammonium chloride was incorporated, the feed was 5 g / h, and the quadratic chloride mass fraction was 5%. Processing time is 8h. The acetone solvent was treated again for 2 hours, and the amount of feed was 10 g / h. Example B of the titanium silicon molecular sieve catalyst after regeneration was obtained.
Embodiment 3
[0035] 5G inactivated catalyst was filled in a fixed bed reaction tube constant temperature section, at 1.0 MPa, 100 ° C for 2 hours, and the feed volume was 8 g / h. Then, the peroxide acetone solution was then introduced, the amount of feed was 10 g / h, and the peroxide mass fraction was 12%, and the treatment time was 2 hours. The aqueous tetrabutylammonium chloride solution is then introduced, the amount of feed is 6 g / h, and the mass fraction of tetrabutylammonium chloride is 5%. Processing time is 3h. The acetonitrile solvent was treated again for 6 hours, and the amount of feed was 10 g / h. Example C of titanium silicon molecular sieve catalyst after regeneration was obtained.
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