Polyoxymethylene dimethyl ethers (PODEn or DMMn) are a class of chemical compounds with the molecular formula CH₃O(CH₂O)nCH₃ where n is typically about 3 to 8.PODEn, which can be obtained from methanol in a process chain,has the advantages of extremely low sulfur content and zero arene content.DMM_3-8 is recognized as a new diesel additive component, which can greatly improve the combustion efficiency of diesel and reduce the emission of pollutants. At the same time when n=2-5,DMMn is a new aromatic free green solvent. Therefore, as environmental protection plays an increasingly important role in development, the development of clean energy DMMn products has been widely concerned by scholars.

Sichuan Xinda adopts the innovative and high technology with independent intellectual property rights which has been developed successfully by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences for many years.It invested more than 700 million RMB to build the world's first "Annual Output of 50,000 tons of Polyoxymethylene Dimethyl Ethers" industrialization demonstration plant.

By now,we have three types DMMn product, DMM₂（XD-S100） and DMM_3-5(XD-S240) and DMM_3-8(XD-S320).In future,we will introduce more DMMn product to the market soon,such as DMM₃ and DMM_4-5 etc.