Molybdenum carbonyl grafted onto silicate intercalated cobalt–aluminum hydrotalcite: A new potential catalyst for the hydroformylation of octene

Preparation of an MCM‐22/Hydrotalcite Framework Composite and Its Catalytic Application

“…As‐synthesized HT shows reflections around 2 θ values of 12 and 23, corresponding to the (003) and (006) planes of the layered HT structure, respectively. The powder XRD pattern of pure MCM‐22 shows all reflections characteristic of the MWW (framework code of MCM‐22 zeolite) structure . The XRD profile of the as‐synthesized composite (MAMCM and MAMCM‐1), has reflections corresponding to the coexistence of both the layered HT structure and MCM‐22.…”

“…The MAMCM composite was prepared by a three‐step procedure. Initially the MCM‐22 and MA‐HT precursor gel were separately obtained as per procedures described in the literature , , . The MCM‐22 gel was prepared with a molar gel composition of SiO 2 /NaOH/Al 2 O 3 /HMI/H 2 O = 1:0.3:0.033:0.5:40 , .…”

“…In the second step, briefly, MA‐HT gel was prepared with a molar composition of Mg 2+ /Al 3+ /CO 3 2– /NH 4 + /H 2 O = 0.116:0.038:0.0769:0.379:30.6 . Solution 1 was prepared by dissolving metal nitrates of Mg and Al such as Mg(NO 3 ) 2 · 6H 2 O (29.74 g) and Al(NO 3 ) 3 · 9H 2 O (14.2 g), respectively, and solution 2 was prepared by dissolving bases such as (NH 4 ) 2 CO 3 (7.38 g) and NH 4 OH (13.28 g) in equal amounts of 30.6 m in deionized H 2 O (550.8 g).…”

“…In this regard, it is worth to mention here that recently, the introduction of silicate into the interlayer space of hydrotalcite materials was demonstrated. The resultant materials possess higher surface area and expose active sites favoring superior catalytic activity to that of traditional oxide catalysts derived from pure HT …”

Framework of ruthenium-containing nickel hydrotalcite-type material: preparation, characterisation, and its catalytic application

“…These materials can be used either in the as-synthesised form or in the form of mixed metal oxides derived aer calcination. [1][2][3][4][6][7][8][9][10][11][12][13][14] These types of layered HT materials possess inherent basicity and have redox properties, which are derived from the elemental composition of the octahedral layers of the materials. Catalytic properties of HTs can be modied by introducing varying divalent and trivalent cations such as Zn 2+ , Ni 2+ , Mn 2+ , Co 2+ , Fe 2+ , Cr 3+ , Fe 3+ , Mn 3+ , Co 3+ , and Ga 3+ into the framework.…”