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)

ROCH.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)

ROCH.sub.2CH.sub.2OCHCH.sub.2(2) where R has the same meaning as R in the formula (1), and subjecting the resulting mixture to azeotropic distillation.

A hydrofluoroolefin compound is represented by the following general formula (I): where R.sub.f is a linear or branched perfluorinated alkyl group containing 2-10 carbon atoms and optionally contains (i) at least one catenated heteroatom selected from O or N; or (ii) a ring structure having 3 to 6 ring carbon atoms that optionally contains one or more catentated heteroatoms selected from O or N.

##STR00001##

Fragrance compounds having a unique chemical structure are provided, including esters and ethers of 3-cyclohexenyl methanol and derivatives thereof. The fragrance compounds can have multi-faceted odors. The fragrance compounds can be used alone or incorporated into a fragrance composition and/or consumer product to modify or enhance the odor of the fragrance composition and/or consumer product.

A wetness-retaining ophthalmic lens material comprises an organic monomer, a cross-linking agent, an initiator, a salt, and a solvent. The salt dissolves in the water dissociates a plurality of anions and cations, which bind to water molecules and retard the evaporation of the water molecules, the ophthalmic lens material thus can keep wet for a long time. An ophthalmic lens made of the ophthalmic lens material is also provided.

A wetness-retaining ophthalmic lens material comprises an organic monomer, a cross-linking agent, an initiator, a salt, and a solvent. The salt dissolves in the water dissociates a plurality of anions and cations, which bind to water molecules and retard the evaporation of the water molecules, the ophthalmic lens material thus can keep wet for a long time. An ophthalmic lens made of the ophthalmic lens material is also provided.

A wetness-retaining ophthalmic lens material comprises an organic monomer, a cross-linking agent, an initiator, a salt, and a solvent. The salt dissolves in the water dissociates a plurality of anions and cations, which bind to water molecules and retard the evaporation of the water molecules, the ophthalmic lens material thus can keep wet for a long time. An ophthalmic lens made of the ophthalmic lens material is also provided.

A wetness-retaining ophthalmic lens material comprises an organic monomer, a cross-linking agent, an initiator, a salt, and a solvent. The salt dissolves in the water dissociates a plurality of anions and cations, which bind to water molecules and retard the evaporation of the water molecules, the ophthalmic lens material thus can keep wet for a long time. An ophthalmic lens made of the ophthalmic lens material is also provided.

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.

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.