Vanadium oxide dust

Synonyms/Trade Names Divanadium pentoxide dust. Vanadic anhydride dust. Vanadium oxide dust. Vanadium pentaoxide dust. Other synonyms vary depending upon the specific vanadium compound. 

Vanadium powder, dust, and most of its oxide compounds are explosive when exposed to heat and air. They are also toxic when inhaled. Vanadium chloride compounds are strong irritants to the skin and poisonous when ingested. 

VANADIUM BROMIDE see VEKOOO VANADIUM CHLORIDE see VEFOOO VANADIUM(III) CHLORIDE see VEPOOO VANADIUM COMPOUNDS see VCZOOO VANADIUM DUST and FUME (ACGIH) see VDUOOO VANADIUM DUST and FUME (ACGIH) see VDZOOO VANADIUM (OSHA) see VDZOOO VANADIUM OXIDE see VEAOOO VANADIUM(V) OXIDE see VDUOOO VANADIUM OXYTRICHLORIDE see VDPOOO VANADIUM PENTAOXIDE see VDUOOO VANADIUMPENTOXID (GERMAN) see VDUOOO VANADIUM PENTOXIDE (dust) see VDUOOO VANADIUM PENTOXIDE (fume) see VDZOOO... 

Carsey TP. 1985. Quantitation of vanadium oxides in airborne dusts by x-ray diffraction. Anal Chem 57 2125-2130. 

Vanadium(V) oxide dust or fume [Vanadium pentoxide] V703 1314-62-1 0.05 mg/m ... 

Synonyms Cl 77938 Vanadic acid anhydride Vanadic anhydride Vanadium dust and fume Vanadium oxide... 

Vanadium (V) oxide Vanadium pentaoxide Vanadium pentoxide (dust) Vanadium pentoxide (fume) Vanadium pentoxide, nonfused... 

The adopted values for TWAs for airborne vanadium, including oxide and metal dusts of vanadium, is 0.5 mg/m the values for fumes of vanadium compounds is 0.05 mg/m. These limits are for normal 8-h workday and 40-h work-week exposures. The short-term exposure limit (STEL) is 1.5 mg/m for dusts (25). A description of health ha2ards, including symptoms, first aid, and organ involvement, personal protection, and respirator use has beenpubhshed (26). 

High 50,000 0,000 8-16 Aluminum, copper, zinc, vanadium, calcined dolomite, hme, magnesia, magnesium carhonates, sodium chloride, sodium and potassium compounds Flue dust, natural and reduced iron ores Flue dust, iron oxide, natural and reduced iron ores, scrap metals... 

Any dust and impurities are removed from the sulfur dioxide produced, as well as any unreacted oxygen. These clean gases are heated to a temperature of approximately 450 °C and fed into a reaction vessel, where they are passed over a catalyst of vanadium(v) oxide (V2Os). This catalyses the reaction between sulfur dioxide and oxygen to produce sulfur trioxide (sulfur(vi) oxide, SOs). 

However, this reaction is very slow in the absence of a catalyst. One of the mysteries during early research on air pollution was how the sulfur dioxide produced from the combustion of sulfur-containing fuels is so rapidly converted to sulfur trioxide in the atmosphere. It is now known that dust and other particles can act as heterogeneous catalysts for this process (see Section 15.9). In the preparation of sulfur trioxide for the manufacture of sulfuric acid, either platinum metal or vanadium(V) oxide (V205) is used as a catalyst, and the reaction is carried out at approximately 500°C, even though this temperature decreases the value of the equilibrium constant for this exothermic reaction. 

OSHA PEL Respirable Dust and Fume TWA 0.05 mg(V205)/m3 NIOSH REL TWA 1.0 mg(V)/m3 SAFETY PROFILE An inhalation hazard. Poison by subcutaneous route. Questionable carcinogen with experimental tumorigenic data. Flammable in dust form from heat, flame, or sparks. Violent reaction with BrFs, CI2, lithium, nitryl fluoride, oxidants. When heated to decomposition it emits toxic fumes of VOx. See also VANADIUM COMPOUNDS. 

VANADIUM DUST and FUME (ACGIH) VANAD-IUM(V) OXIDE VANADIUM PENTAOXIDE VANADIUMPENTOXID (GERMAN) VANADIUM PENTOXIDE, non-fused form (DOT) VANADIUM-PENTOXYDE (DUTCH) VANADIUM, PENTOXYDE de (FRENCH) WANADU PIECIOTLENEK (POLISH)... 

Vanadium is mainly absorbed via the respiratory and gastrointestinal routes. The oxidation state of vanadium does not appear to influence absorption (Carson et al.. 1986). In occupational exposure the main route of absorption is by inhalation of dust and fumes containing vanadium or vanadium compounds. 

Solid Waste - The oxidation process uses vanadium catalyst that must be periodically removed and screened for dusts. A 1,500-tpd plant produces 20 m of the spent catalyst annually. 

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