Phthalic Anhydride → 6688-50-2

Participants

Reaction Steps

1.48 kg of phthalic anhydride and 2.49 kg of dibutyltin oxide are mixed with one another, and the mixture is continuously added to a twin-screw laboratory extruder via an addition tunnel. The cylinder section consists of three heating zones and a cooling zone. The temperature of the mixture in the reaction zone is 63° C. After passing through the cooling extruder unit, the product temperature at the discharge point is 38° C. The throughput takes 35 minutes, which corresponds to an average residence time of 4.7 min. Dibutyltin phthalate (compound 1) is obtained as the end product in the form of a white free-flowing powder.

Provenance & Evidence