Synthesis of glycidol via transesterification glycerol with dimethylcarbonate in the presence of composites based on a layered titanosilicate AM-4 and ZIF-8

The AM-4 Family of Layered Titanosilicates: Single-Crystal-to-Single-Crystal Transformation, Synthesis and Ionic Conductivity

“…The same titanosilicate blocks are also present in the structure of synthetic AM-4 material [ 27 , 49 ] that attracted considerable interest due to its selective cation-exchange properties [ 49 , 96 ]. Our experiments indicate that acid treatment of AM-4 leads to the formation of the layered structure of the L3 type, which opens a possibility for its use for the creation of a new family of layered titanosilicate materials in catalysis [ 13 , 50 ].…”

“…The acidic form of AM-4 can be used as a renewable sorbent for the Ag and I uptakes, with at least five cycles of transformation without loss of sorption properties [ 49 ]. Acid modification of AM-4 with HNO 3 is used for the reaction of catalysis cyclocondansation between 1,2-phenylenediamine and acetone [ 13 ] and transesterification of glycerol with dimethylcarbonate [ 50 ]. The XRD powder pattern of the acid-modified form significantly differs from the initial AM-4 [ 13 ]; the crystal structure of this phase is unknown.…”

Metal Organic Frameworks Derived Catalysts for the Upgrading of Platform Chemicals

“…Timofeeva et al found that a composite consisting of microporous layered titanosilicate Aveiro-Manchester-4 (AM-4) and ZIF-8 was efficient for the one-pot synthesis of glycidol from glycerol and dimethyl carbonate through the tandem transesterification and decarbonylation, and the quantity of ZIF-8 within the composite played a crucial role in determining the selectivity of glycidol. [117] And it was interesting to say that Sun et al further found that the hydrogenation of glycidol over a carbon film encapsulated Co nanoparticle catalyst (Co@NC, that prepared via the pyrolysis of Co-MOFs) could bring another important monomer (1,3-propanediol, 1,3-PDO). This Co@NC catalyst was highly active, selective and stable for the formation of 1,3-PDO from glycidol under mild conditions, and the high selectivity toward 1,3-PDO was attributed to that carbon film encapsulation could inhibit the excessive adsorption and activation of H 2 molecules (see Figure 11).…”

“…Timofeeva et al. found that a composite consisting of microporous layered titanosilicate Aveiro‐Manchester‐4 (AM‐4) and ZIF‐8 was efficient for the one‐pot synthesis of glycidol from glycerol and dimethyl carbonate through the tandem transesterification and decarbonylation, and the quantity of ZIF‐8 within the composite played a crucial role in determining the selectivity of glycidol [117] …”