| 摘要 |
A production method for a compound, whereby the oxygen concentration from the start of a crystallization step for crystals to the end of a drying step is no more than 3 vol%, in a series of steps in which: a solution for a compound having -CF2O- in a linking group is prepared; crystals are crystallized by separating crystals from the obtained solution for separating crystals, after the solution is caused to come in contact with a refining agent or without causing the solution to come in contact with a refining agent; and the obtained crystals are filtered and dried. |
