Patent ID: 9371239
Filing Date: 2016-06-21
CPC Classification: B01J,C01B,C07D

Claim Text:
1. A process for preparing a tin-containing zeolitic material having an MWW-type framework structure (Sn-MWW) comprising (i) providing a boron-containing zeolitic material having an MWW framework structure comprising SiO (ii) deboronating the B-MWW by treating the B-MWW provided in (i) with a liquid solvent system having a pH in the range of from 5.5 to 8; (iii) incorporating Sn into deboronated B-MWW obtained from (ii) by a process comprising (iv) treating the tin-containing zeolitic material having an MWW-type framework structure obtained from (iii) with an aqueous solution having a pH of at most 5 thereby obtaining the Sn-MWW having an Sn content of at most 2 weight-%, calculated as element and based on the weight of the Sn-MWW, and optionally separating the Sn-MWW from the aqueous solution.