Mitsui Chemicals Inc. (TYO:4183) has posted record-high net, ordinary and operating profit figures for the combined first three quarters of fiscal 2017 (April–December). Sales for the period totaled 959.83 billion yen ($8.78 billion), up 10.3 percent from the same period in the previous year. Operating profit was 75.74 billion yen, up 5.7 percent year-on-year; ordinary profit was 78.85 billion yen,…