Devolatilization process for SMA (Styrene Maleic Anhydride) product production

The invention discloses a devolatilization process for SMA (Styrene Maleic Anhydride) product production. The devolatilization process comprises mixing, preheating, extruding, filtering and devolatilization treatment of SMA, and relates to the technical field of chemical production. The devolatilization process is characterized in that a preheating mechanism is arranged at the bottom of an extrusion mechanism, and hot oil is used for preheating SMA in a preheating pipe inside a preheating pipe barrel, so that the temperature difference between the SMA and the interior of a machine barrel can be reduced, then the local overheating danger of SMA molecular chains is effectively avoided, and the obtaining rate of the SMA is guaranteed; in addition, a heat conduction pipe is arranged in the machine barrel, the hot oil passing through the preheating pipe barrel enters the heat conduction pipe, and the SMA located in the middle of the machine barrel is heated through the heat conduction pipe; meanwhile, the machine