There are two prevailing processes for MMA, or methyl methacrylate production, C-2 Process starting from ethylene, methanol and formaldehyde, C-3 Process (also called as 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-TECH provides MMA plant based on C-4 Process, consisting of three working units, i.e. oxidation unit, distillation unit and esterification unit.
| C-2 Process | C-3 Process | C-4 Process | |
| Feed | The ethylene, methanol, and formaldehyde can be used as the feed. | It is required to use the byproduct of HCN from acrylonitrile unit as the feed. | Isobutene or tertiary butynol (TBA) as the feed, which is easy to access. |
| Investment Cost | High | High | Comparatively Low |
| Environmental Impact & Safety Performance | Environmentally-friendly | The treatment cost of the ammonium bisulfate-contained sewage is pretty high and is harmful to the environment. | Environmentally-friendly |
| S/N | Item | Index |
| 1 | Purity, wt% ≥ | 99.9 |
| 2 | Color, APHA ≤ | 10 |
| 3 | Water Content, wt% ≤ | 0.05 |
| 4 | Acidity, wt% ≤ | 0.005 |
| 5 | Polymerization inhibitor, ppm | 10 |
Polysulfone Production Technology
Paraformaldehyde (Spray Dryer Process)
Hydrogen Peroxide
Urea Formaldehyde
EN