| abstract |
The present invention is a process for preparing a zeolite material having an MWW framework structure comprising YO 2 and B 2 O 3 , wherein Y represents a tetravalent element, (i) preparing a mixture comprising at least one source of YO 2 , at least one source of B 2 O 3 , at least one organic template, and seed crystals, (ii) crystallizing the mixture obtained in (i) to obtain a laminated precursor of the MWW framework structure, (iii) calcining the laminated precursor obtained in (ii) to obtain a zeolite material having an MWW framework structure , Wherein at least one organic mold has the formula (I) R 1 R 2 R 3 N (I) In this formula, And R 1 is (C 5 -C 8) cycloalkyl, R 2 and R 3 are independently of each other H or alkyl, the mixture prepared in step (i) and crystallized in step (ii) comprises not more than 35% by weight of H 2 O based on 100% by weight of YO 2 contained in the mixture prepared in (i) and crystallized in (ii) And to synthetic boron-containing zeolites obtainable and / or obtainable according to the process of the invention and to their use. |