Composition containing fluorine-containing monomer and fluoride ions, method for producing fluorine-containing monomer having reduced fluoride ion content, and method for purifying fluorine-containing monomer

A method for producing a fluorine-containing monomer (M) having a further reduced fluoride ion content from a fluorine-containing monomer (M) contaminated with fluoride ions,

• the method comprising:
• subjecting the fluorine-containing monomer (M) contaminated with fluoride ions to at least one treatment selected from the group consisting of activated carbon adsorption and washing to reduce fluoride ions;
• wherein the fluoride ion content of the fluorine-containing monomer (M) produced is 0.01 to 1000 ppm by mass, and
• the fluorine-containing monomer (M) is at least one monomer selected from the group consisting of
• a compound represented by formula (M1):
• wherein R1 and R2 each independently represent a fluorine atom, a perfluoroalkyl group, or a perfluoroalkoxy group,
• a compound represented formula (M2):
• wherein R3, R4, R5, and R6 each independently represent a fluorine atom, a perfluoroalkyl group, or a perfluoroalkoxy group, and
• a compound represented by formula (M3):
• wherein R7, R1, R9, and R10 each independently represent a fluorine atom, a perfluoroalkyl group, or a perfluoroalkoxy group.

A method for purifying a fluorine-containing monomer (M) contaminated with fluoride ions,

• the method comprising:
• subjecting the fluorine-containing monomer (M) contaminated with fluoride ions to at least one treatment selected from the group consisting of activated carbon adsorption and washing to reduce fluoride ions;
• wherein the fluorine-containing monomer (M) is at least one monomer selected from the group consisting of
• a compound represented by formula (M1):
• wherein R1 and R2 each independently represent a fluorine atom, a perfluoroalkyl group, or a perfluoroalkoxy group,
• a compound represented by formula (M2):
• wherein R3, R4, R5, and R6 each independently represent a fluorine atom, a perfluoroalkyl group, or a perfluoroalkoxy group, and
• a compound represented by formula (M3):
• wherein R7, R1, R9, and R10 each independently represent a fluorine atom, a perfluoroalkyl group, or a perfluoroalkoxy group.