A surfactant composition contains: a C12 compound of the following formula (1):

##STR00001##

where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is 9; a C13 compound of the formula (1), where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is 10; a C14 compound of the formula (1), where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is 11; and a Y compound of the formula (1), where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is at least one of 8 or less and 12 or more.

A surfactant composition contains: a C12 compound of the following formula (1):

##STR00001##

where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is 9; a C13 compound of the formula (1), where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is 10; a C14 compound of the formula (1), where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is 11; and a Y compound of the formula (1), where A is an alkylene group having 1 to 3 carbon atoms, x is 1 to 50, and m+n is at least one of 8 or less and 12 or more.

An alkoxyvinyl ether is disclosed having the chemical structure R.sub.fC(OR)═CHR.sub.f′, wherein R.sub.f is an at least partially fluorinated functional group having at least one carbon atom, R.sub.f′ is an at least partially fluorinated functional group having at least two carbon atoms, and R is a functional group. A method for preparing an alkoxyvinyl ether is disclosed, comprising R.sub.fCFHCFHR.sub.f′+KOH/ROH.fwdarw.R.sub.fC(OR)═CHR.sub.f′, wherein R.sub.f is a perfluoro functional group, R.sub.f′ is a perfluoro functional group, and R is an alkyl functional group. Another method for preparing an alkoxyvinyl ether is disclosed, comprising R.sub.fCF═CHR.sub.f′+KOH/ROH.fwdarw.R.sub.fC(OR)═CHR.sub.f′, wherein R.sub.f is a perfluoro functional group, R.sub.f′ is a perfluoro functional group, and R is an alkyl functional group.

An alkoxyvinyl ether is disclosed having the chemical structure R.sub.fC(OR)═CHR.sub.f′, wherein R.sub.f is an at least partially fluorinated functional group having at least one carbon atom, R.sub.f′ is an at least partially fluorinated functional group having at least two carbon atoms, and R is a functional group. A method for preparing an alkoxyvinyl ether is disclosed, comprising R.sub.fCFHCFHR.sub.f′+KOH/ROH.fwdarw.R.sub.fC(OR)═CHR.sub.f′, wherein R.sub.f is a perfluoro functional group, R.sub.f′ is a perfluoro functional group, and R is an alkyl functional group. Another method for preparing an alkoxyvinyl ether is disclosed, comprising R.sub.fCF═CHR.sub.f′+KOH/ROH.fwdarw.R.sub.fC(OR)═CHR.sub.f′, wherein R.sub.f is a perfluoro functional group, R.sub.f′ is a perfluoro functional group, and R is an alkyl functional group.

A method can produce a divinyl ether compound having an alkylene skeleton from an alkanediol and acetylene at a rapid production rate and a high reaction yield. In the production method, a compound of formula (1)

##STR00001##

wherein R.sup.1 is an alkylene group having 4 to 20 carbon atoms, may be reacted with acetylene in the presence of an alkali metal catalyst to produce a compound of formula (2)

##STR00002##

and the reaction may be performed in the absence of a solvent.

A method can produce a divinyl ether compound having an alkylene skeleton from an alkanediol and acetylene at a rapid production rate and a high reaction yield. In the production method, a compound of formula (1)

##STR00001##

wherein R.sup.1 is an alkylene group having 4 to 20 carbon atoms, may be reacted with acetylene in the presence of an alkali metal catalyst to produce a compound of formula (2)

##STR00002##

and the reaction may be performed in the absence of a solvent.

A method of purifying a divinyl ether compound having an alkylene skeleton may take place with low energy and in a simplified manner. Such a method for producing a divinyl ether compound may include: reacting a compound of formula (1)

##STR00001##

wherein R.sup.1 is an alkylene group having 4 to 20 carbon atoms, with acetylene by using an alkali metal catalyst; and purifying the divinyl ether compound of formula (2)

##STR00002##

which is obtained in the reacting, without an extraction.

A method of purifying a divinyl ether compound having an alkylene skeleton may take place with low energy and in a simplified manner. Such a method for producing a divinyl ether compound may include: reacting a compound of formula (1)

##STR00001##

wherein R.sup.1 is an alkylene group having 4 to 20 carbon atoms, with acetylene by using an alkali metal catalyst; and purifying the divinyl ether compound of formula (2)

##STR00002##

which is obtained in the reacting, without an extraction.

To provide a method capable of easily and efficiently removing a 2-alkoxyethanol from a mixture containing the 2-alkoxyethanol and a (2-alkoxyethyl) vinyl ether while suppressing a decrease in the yield of (2-alkoxyethyl) vinyl ether. A method for removing a 2-alkoxyethanol, including the step of adding one or more azeotropic solvents selected from the group consisting of alkanes having 7 to 8 carbon atoms and cycloalkanes having 7 to 8 carbon atoms to a mixture containing the 2-alkoxyethanol represented by the following formula (1)
R—O—CH.sub.2CH.sub.2OH  (1) where R represents an alkyl group having 1 to 4 carbon atoms, and a (2-alkoxyethyl) vinyl ether represented by the following formula (2)
R—O—CH.sub.2CH.sub.2O—CH═CH.sub.2  (2) where R has the same meaning as R in the formula (1), and subjecting the resulting mixture to azeotropic distillation.

To provide a method capable of easily and efficiently removing a 2-alkoxyethanol from a mixture containing the 2-alkoxyethanol and a (2-alkoxyethyl) vinyl ether while suppressing a decrease in the yield of (2-alkoxyethyl) vinyl ether. A method for removing a 2-alkoxyethanol, including the step of adding one or more azeotropic solvents selected from the group consisting of alkanes having 7 to 8 carbon atoms and cycloalkanes having 7 to 8 carbon atoms to a mixture containing the 2-alkoxyethanol represented by the following formula (1)
R—O—CH.sub.2CH.sub.2OH  (1) where R represents an alkyl group having 1 to 4 carbon atoms, and a (2-alkoxyethyl) vinyl ether represented by the following formula (2)
R—O—CH.sub.2CH.sub.2O—CH═CH.sub.2  (2) where R has the same meaning as R in the formula (1), and subjecting the resulting mixture to azeotropic distillation.