There are three prevailing processes for MMA or methyl methacrylate production, C-2 Process starting from ethylene, methanol and formaldehyde, C-3 Process (also called ACH Process) which uses the byproduct of HCN from acrylonitrile production as the feedstock, and C-4 process which uses isobutene or tertiary butanol as the feedstock. SL Tec can help build MMA plant based on C-4 Process, consisting of three working units, i.e. oxidation unit, distillation unit and esterification unit.