US4604266A - Process for purifying molybdenum …
Process for purifying molybdenum trioxide Download PDF Info Publication number US4604266A. US4604266A US06/716,727 US71672785A US4604266A US 4604266 A US4604266 A US 4604266A US 71672785 A US71672785 A US 71672785A US 4604266 A US4604266 A US 4604266A Authority US United States Prior art keywords ammonium ammonium molybdate solution iron concentrate Prior …
US3694147A - Process for the purification of …
The calcination of the molybdenum sulfide is conducted in hearth roasting or rotary kiln pyrometallurgical equipment to drive off substantially all the sulfur as sulfur dioxide. This leaves a …
US4555386A - Process for purifying molybdenum …
The resulting molybdenum concentrate is digested in ammonium hydroxide under conditions that maximize iron precipitation and removal. The resulting ammonium molybdate solution is …
Method of purifying molybdenum trioxide
Method of purifying molybdenum trioxide. C01G39/02 - Oxides; Hydroxides. FIELD: chemistry. SUBSTANCE: invention can be used to produce molybdenum trioxide with high degree of purity, used in synthesis of tellurite glass which has potential for use in making active and passive elements of fibre and integrated infrared optics. Initial molybdenum trioxide is calcined in a vacuum at 550-580°C ...
molybdenum trioxide purifying - V W Automation …
molybdenum trioxide purifying. Molybdenum disulphide as an oil additive . Molybdenum disulphide as an oil additive In past RET-Monitors for this keyword we have taken a general overview of oil additive technology but it is worth looking at some additives in more detail in this case molybdenum disulphide often referred to as just moly . Get Price . Doping strategies for small molecule organic ...
Molybdenum trioxide | MoO3 - PubChem
by inhalation, molybdenum trioxide dust, on the same daily, repeated 1-hr exposure schedule at 250 mg molybdenum trioxide/cu m (164 mg molybdenum/cu m) proved extremely irritating to guinea pigs. loss of appetite & weight occurred; diarrhea & muscular incoordination were apparent, as was loss of hair. of 51 animals exposed, 26 died after tenth ...
Purification of molybdenum (Patent) | OSTI.GOV
The U.S. Department of Energys Office of Scientific and Technical Information
Molybdenum trioxide - Substance Information - …
Molybdenum trioxide. Regulatory process names 12 Translated names 20 IUPAC names 7 Trade names 28 Other identifiers 13 . Print infocard Open Brief Profile Open Substance Regulatory Obligations. Substance identity Substance identity. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. The substance identifiers displayed in the ...
CA1053911A - Molybdenum oxide purification …
MOLYBDENUM OXIDE PURIFICATION PROCESS Abstract of the Disclosure A process for purifying concentrates of molybdenum oxide containing a variety of naturally-occurring contaminating metals, such as potassium, copper, calcium, magnesium, iron, aluminum, lead, Zinc, bismuth, and the like, as well as compounds thereof, by roasting the impure concentrate at an elevated temper-ature in an …
Process for purifying molybdenum trioxide - GTE …
26.11.1985 · Process for purifying molybdenum trioxide . United States Patent 4555386 . Abstract: Processes are described for preparing pure ammonium molybdate from impure roasted molybdenum concentrates. An aqueous solution of nitric acid, ammmonium sulfate, and ammonium nitrate is contacted with impure molybdenum concentrate to solubilize a major portion of the impurities. The resulting molybdenum ...
Process for purifying molybdenum trioxide - GTE …
22.07.1986 · Process for purifying molybdenum trioxide . United States Patent 4601890 . Abstract: Processes are described for preparing pure ammonium molybdate from impure roasted molybdenum concentrates. An aqueous solution of hydrochloric acid and ammonium nitrate is contacted with impure molybdenum concentrate to solubilize a major portion of the impurities. The resulting molybdenum …
US4724128A - Method for purifying molybdenum …
A method is disclosed for purifying molybdenum which involves reducing a molybdenum compound selected from the group consisting of molybdenum trioxide, ammonium dimolybdate, and ammonium paramolybdate to molybdenum dioxide which is then water washed to remove potassium, and produce a purified molybdenum dioxide having a potassium content of no greater than about 30 weight ppm, …
Method for purifying molybdenum - GTE …
09.02.1988 · One method of pre-purifying molybdenum trioxide is by washing it with water or acids to purify it before the reduction to the dioxide. This step is carried out if the potassium level is greater than about 200 weight ppm. Acid leaching of technical grade molybdenum trioxide is a known method to remove potassium from molybdenum.
WO2008139266A3 - Purified molybdenum …
A process for converting molybdenum technical oxide, partially oxidized MoS 2 or off-spec products from MoS 2 oxidation processes into a purified molybdenum trioxide product is provided, generally comprising the steps of: combining molybdenum technical oxide with an oxidizing agent and a leaching agent in a reactor under suitable conditions to effectuate the oxidation of residual MoS 2 , MoO 2 ...
Process for purifying molybdenum trioxide - GTE …
24.06.1986 · Although molybdenum trioxide is substantially insoluble in the above solution which solubilizes the impurities, it is preferred to use from about one part to about three parts by weight aqueous solution per part of impure molybdenum concentrate.
US Patent for Purification of molybdenum trioxide …
U.S. Pat. No. 3,957,946 discloses a process for purifying moybdenum which involves subjecting impure concentrates of molybdenum oxide to oxidative roasting, followed by ammoniacal leaching of the molybdic oxide to produce ammonium molybdate which is further purified by passage through a chelating cation exchange resin.
Molybdenum Trioxide - an overview | …
Molybdenum does not react with oxygen or water at room temperature, and the bulk oxidation occurs at temperatures >790 °C, resulting in molybdenum trioxide, MoO 3. Other common molybdenum compounds commonly encountered include molybdenum trioxide, sodium molybdate, Na 2 MoO 4 ·2H 2 O, and ammonium di- and heptamolybdate, (NH 4 ) 2 Mo 2 O 7 , and (NH 4 ) 6 Mo 7 O 24 ·4H 2 O.
Extraction of molybdenum(VI) by several …
OSTI.GOV Journal Article: Extraction of molybdenum(VI) by several phosphorus-containing organic reagents. [Triisoamylphosphine oxide]
Molybdenum trioxide - Registration Dossier - ECHA
molybdenum trioxide Implementation: EU Remarks: Existing classification in accordance with Commission Regulation (EC) No 790/2009 of 10 August 2009 amending, for the purposes of its adaptation to technical and scientific progress, Regulation (EC) No 1272/2008 of the European Parliament and of the Council on classification, labelling and packaging of substances and mixtures. …