A new layered vanadyl (IV) phosphate with an expanded interlayer

Journal Article · Fri May 01 00:00:00 EDT 1987 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(87)90119-X· OSTI ID:6294201

Alagna, L; Prosperi, T; Tomlinson, A A.G.

At high H/sub 3/PO/sub 4/ : V/sub 2/O/sub 5/ ratios (>4:1), the reaction of V/sub 2/O/sub 5/ with H/sub 3/PO/sub 4/ : EtOH at reflux for extended times gives rise to a material of formulation (VOHPO/sub 4/)/sub 2/ . 2.5H/sub 2/O . EtOH. This material is thermally stable, and has a Stage I layered structure with a distance of 13.58 A between the vanadyl (IV)-phosphate containing planes. Spectroscopic evidence suggests that the EtOH molecule acts as a pillar holding these layers apart and that the stability is due to coordination of the ethanol to in-layer V(IV) atoms. Thermal decomposition of the material gives materials different than those given by the hemihydrate analogue VO(HPO/sub 4/)/sub 2/ . 0.5H/sub 2/O. Such decomposition products may - in part at least - be responsible for many of the irreproducible results found during the preparation of precursors for the V-P-O catalysts adopted in the butane maleic anhydride conversion.

• Research Organization: I.T.S.E., Area della Ricerca di Roma del C.N.R., C.P. 10 Monterotondo Staz., 00016 Rome
• OSTI ID: 6294201
• Journal Information: Mater. Res. Bull.; (United States), Vol. 22:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
VANADIUM PHOSPHATES
CHEMICAL PREPARATION
STRUCTURAL CHEMICAL ANALYSIS
THERMODYNAMIC PROPERTIES
BUTANE
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION YIELD
ETHANOL
HYDRATES
LAYERS
MALEIC ACID
PHOSPHORIC ACID
SPECTROSCOPY
STABILITY
TEMPERATURE EFFECTS
THERMAL DEGRADATION
ALCOHOLS
ALKANES
CARBOXYLIC ACIDS
DICARBOXYLIC ACIDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
YIELDS
360602* - Other Materials- Structure & Phase Studies
360601 - Other Materials- Preparation & Manufacture