Method for storing fluoro-2-butene
Provided is a method for storing a fluoro-2-butene by which isomerization reaction is unlikely to proceed during storage. A fluoro-2-butene represented by general formula C 4 H x F y where x is 0 or more and 7 or less, y is 1 or more and 8 or less, and x+y is 8 contains or does not contain hydrogen fluoride as an impurity. The fluoro-2-butene is stored in a container in which the concentration of hydrogen fluoride is 100 ppm by volume or less in a gas phase portion when the fluoro-2-butene contains hydrogen fluoride.
1 . A method for storing a fluoro-2-butene comprising
storing the fluoro-2-butene in a container,
wherein the fluoro-butene is represented by general formula C 4 H x F y where x is 0 or more and 7 or less, y is 1 or more and 8 or less, and x+y is 8, wherein
the fluoro-2-butene contains or does not contain hydrogen fluoride as an impurity, and a concentration of hydrogen fluoride is 100 ppm by volume or less in a gas phase portion when the fluoro-2-butene contains hydrogen fluoride.
2 . The method for storing a fluoro-2-butene according to claim 1 , wherein the fluoro-2-butene is at least one selected from (Z)-1,1,1,4,4,4-hexafluoro-2-butene, (E)-1,1,1,4,4,4-hexafluoro-2-butene, (Z)-1,1,1,2,4,4,4-heptafluoro-2-butene, (E)-1,1,1,2,4,4,4-heptafluoro-2-butene, (Z)-1,1,1,2,3,4,4,4-octafluoro-2-butene, and (E)-1,1,1,2,3,4,4,4-octafluoro-2-butene.
3 . The method for storing a fluoro-2-butene according to claim 1 , wherein the fluoro-2-butene is stored at a temperature of −20° C. or more and 50° C. or less.
4 . The method for storing a fluoro-2-butene according to claim 2 , wherein the fluoro-2-butene is stored at a temperature of −20° C. or more and 50°° C. or less.
5 . The method for storing a fluoro-2-butene according to claim 1 ,
wherein the fluoro-2-butene contains hydrogen fluoride as an impurity, and
the fluoro-2-butene is stably stored by suppressing isomerization of the fluoro-2-butene.