Features:
Use C4 and methanol as raw materials, featuring two-stage oxidation and long-life catalysts.

Technical advantages:
I. Compared to the acetone cyanohydrin method
It is not subject to the impact of the output of hydrocyanic acid byproduct in the production of acrylonitrile.As there is no excess ammonium bisulfate produced due to excessive concentrated sulfuric acid in the reaction process, thus it does not require the high-cost waste treatment, which also effectively avoids safety problems due to the hydrocyanic acid raw materials.
II. Compared to the other two-stage C4 oxidation methods
① The unique cooling technology reduces the generation of by-products.
② The patented extraction technology improves the yield coefficient of methacrolein.
③ The catalyst life is 2 years, while the replacement intervals of other producers are mostly 3 months, so it reduces the unit cost and the operating costs.
④ The purity of MMA product is up to 99.99%.
III. Compared to the method of direct methylation of C4
It does not require separation and purification on the byproducts methacrylic acid and m methanol in the production of MMA directly from methylacrolein, and requires no noble metal catalyst.

Industrialization Level:
Japan’s 50,000 ton equipment has been running safely for more than 20 years. Korea’s 50,000 ton equipment has been running safelyfor over 15 years. And China’s 100,000 ton equipment has been running safely for more than 8 years.

Description and pictures:
proprietary technology of producing high concentrations of methyl methacrylate from isobutylene or tertiary butanol through methyl acrylate.


Recommended process route:
1. With a refining unit and self-produce mixed C4, refine isobutene through TBA or MTBE, as the raw materials of MMA production.
2. Produce high concentrations of isobutylene through MTBE cracking, as raw materials of MMA production.
3. Conduct isomerization reaction to the MTBE etherified C4 to obtain isobutylene of certain concentration, then purify the isobutylene by TBA or MTBE, as raw materials of MMA production.
4. MTO C4 byproductConduct isomerization reaction on the mixture of MTO byproduct and C4 to obtain isobutylene of certain concentration, then purify the isobutylene by TBA or MTBE, as raw materials of MMA production.