Process for preparing the titanosilicate zeolite MWW form of pure silica using mww as precursor and its use.

摘要

The present invention relates to a process of synthesis of metallosilicate MWW form of zeolite comprising at least the following steps: #i) MWW Precursor Preparation pure silica by heating a mixture comprising at least one organic compound acts as organic structure directing agent (ADEO), at least one source of silicon and water, among other compounds that may be needed (such as fluoride anions); followed by recovery of the resulting crystalline solid and calcination to remove traces of organic compound. # ii) Preparation of metallosilicate MWW heating the pure precursor silica obtained in the first step with at least one source of metal (M), water, and at least one organic molecule (agent organic structure directing, ADEO) normally used in typical preparation of materials MWW. # where M is selected from at least one element of groups 3 to 14 of period 4 or more of the periodic table. # iii) Recovery and calcination of the material obtained in ii).