Vinyl fluoride

• Vinyl fluoride
• Fluorinated ethylene
• Monofluorethen
• VF
• R1141

Highly flammable, colorless gas with ethereal odor

Gaseous

0.636 g · cm -3

-160.5 ° C

-72.2 ° C

24.879 bar (20 ° C)

Slightly soluble in water

Risk

-138.8 KJ / mol

Template: Infobox chemical / molecular formula search available

Fluoroethene is a chemical compound from the group of unsaturated aliphatic halogenated hydrocarbons, and organic fluorine compounds.

Production and representation

Frédéric Swarts fluoroethene synthesized for the first time in 1901. He used while the reaction of zinc with 1,1- difluoro-2- bromoethane. Today it is produced industrially in two ways: First, by the reaction of acetylene with hydrogen fluoride and mercury compounds or aluminum, tin or zinc fluoride as a catalyst:

And secondly, by catalytic Dehydrofluorination or dechlorination of 1,1,1- trifluoroethane and 1,1- chlorofluoroethane:

It is classified by the U.S. Environmental Protection Agency ( EPA) as a high production chemical, as its production volume in 1990 amounted to more than a million pounds. 1999, more than 33,000 tons were produced worldwide.

Properties

Fluoroethene is a highly flammable, colorless gas with ethereal odor. It is heavier than air and slightly soluble in water. It is chemically unstable and has a tendency to polymerize. In compressed gas cylinders it is in liquid form. When flowing the liquid or at the escape of large quantities of gas to mist that spread on the ground form. The vapor pressure function is given by Antoine corresponding log10 (P) = A- ( B / ( T C )) ( P in bar, T in K) with A = 3.46439, B = C = -30.039 593.551 and in the temperature range of from 123.8 to 201.0 K, it has a critical temperature of 54.73 ° C, a critical pressure of 51.12 bar, a critical density of 0.322 kg / l and a triple point temperature (melting temperature) of -160.5 ° C.

Use

Fluoroethene is used for the production of polyvinyl fluoride ( PVF ), and for the copolymerization with chlorotrifluoroethylene and hexafluoropropylene. It has been used in the past under the designation R1141 as refrigerant.

Safety

The vapors of fluoroethene can combine with air to form an explosive mixture (ignition temperature 375 ° C). There is a suspicion of a carcinogenic effect.

Related compounds

• Vinyl bromide
• Vinyl chloride
• Vinylidene