ChemicalBook CAS DataBase List Hydrogen fluoride

Hydrogen fluoride synthesis

7synthesis methods

Product Name:Hydrogen fluoride
CAS Number:7664-39-3
Molecular formula:FH
Molecular Weight:20.01

Anhydrous hydrogen fluoride is manufactured by the action of sulfuric on calcium fluoride. Powdered acid-grade fluorspar (≥97% CaF2) is distilled with concentrated sulfuric acid; the gaseous hydrogen fluoride that leaves the reactor is condensed and purified by distillation.
Anhydrous hydrogen fluoride is manufactured by treating fluorspar (fluorite, CaF2) with concentrated sulfuric acid in heated kilns. The gaseous HF evolved is purified by distillation, condensed as liquid anhydrous HF, and stored in steel tanks and cylinders.

368-39-8
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82113-65-3 Synthesis

82113-65-3
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$25.00/1g

Oxonium, triethyl-, salt with 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methanesulfonamide (1:1)

945614-34-6
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7664-39-3
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$21.00/25ml

7637-07-2
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$35.29/10ML

Yield:945614-34-6 100%

Reaction Conditions:

at 75 - 80; for 3 h;

Steps:

3

Example 3Triethyloxonium bis(trifluoromethylsulfonyl)imide A mixture of 3.7 g (19.47 mmol) of triethyloxonium tetrafluoroborate and 5.47 g (19.46 mmol) of bis(trifluoromethylsulfonyl)imide is heated to 75-80° C. (temperature of the oil bath) and stirred for three hours under a nitrogen atmosphere. Volatile constituents are pumped off over the course of one hour under reduced pressure (7 Pa) at 75-80° C. (temperature of the oil bath), giving 7.46 g of an oil. The yield of triethyloxonium bis(trifluoromethylsulfonyl)imide is virtually quantitative. The product was investigated by NMR spectroscopy.¹H NMR spectrum, ppm: 1.51 t (3CH₃), 4.68 q (3CH₂); J³_H,H=7.1 Hz.¹⁹F NMR spectrum, ppm: -78.98 s

References:

US2009/36628,2009,A1 Location in patent:Page/Page column 10

368-40-1 Synthesis