Determination of fluorine in antimony catalysts for the liquid-phase production of freons

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:6812176

Shchavelev, V B

In order to reduce the solubility of lanthanum fluoride and to improve the precision of fluorine determination, (ILLEGIBLE) recommend (ILLEGIBLE) organic solvents (ethanol, acetone, etc.) to the titrated solution. It is shown that fluoride can be determined in the presence of antimony without preparation only when all antimony is present in the tervalent state. The results obtained in the determination of fluoride ion in synthetic mixtures at a fluorine:antimony molar ratio of 2, which approximates the composition of the antimony catalyst, are shown in tables. It can be seen that hydrobromic acid is the only suitable of the agents tested, whereby its concentration in the analyzed sample must not be less than 7.6. The relatively high reproducibility of the proposed procedure allows the authors to recommend it for the determination of fluorine in antimony catalysts or other analogous compositions when fluorine and pentavalent antimony are present simultaneously.

• OSTI ID: 6812176
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 52:2; ISSN INDLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ACETONE
ALCOHOLS
ANTIMONY CHLORIDES
ANTIMONY COMPOUNDS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTS
ETHANOL
FLUORIDES
FLUORINE
FLUORINE COMPOUNDS
FREONS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENS
HYDROBROMIC ACID
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
ION SELECTIVE ELECTRODE ANALYSIS
KETONES
LANTHANUM COMPOUNDS
LANTHANUM FLUORIDES
LANTHANUM NITRATES
NITRATES
NITROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RARE EARTH COMPOUNDS
SOLUBILITY
SYNTHESIS
TITRATION