Shanghai has a new molecular sieve Ltd. Keywords: eutectic; molecular sieve; DME; carbonylation; methyl acetate CLC: TQ426.61 sieve, TQ225.24 + 1 Document code: A DOI: 10.3969 / j. issn.1006-6829.2013.03.005 in the synthesis of molecular sieves, the same reaction system often generates multiple Gujiao zeolite crystals, which is mixed crystal zeolite synthesis, symbiosis or eutectic phenomenon. 2-phase co-crystallized zeolite allows its catalytic reaction in the course of the reaction molecules more accessible to the active site, significantly improve the catalytic reaction rate controlled by diffusion, product selectivity, as well as resistant to deactivation more carbon pores is removed by baking, etc. Features, Shanghai Co. --4A new molecular sieve zeolite using three-dimensional structure of this technology can be fully mordenite catalyst amount of strong acid and high-acid and β zeolites with large aperture (0.76nm × 0.64nm) complement each other off stone sieve, their limitations were overcome two Yuanping sieve, with good thermal stability of water and methanol dehydration reaction process DME good application effect. DME carbonylation of methyl acetate synthesis reaction, DITZEL, umbrella Xiao Guang, SHEN Wenjie, who will mordenite zeolite as a catalyst for the reaction, the original flat sieve | molecular sieve | new new zeolite molecular sieves by Shanghai Limited. Shanghai new molecular sieve Limited (www.molsionms.com) strong, credible, in Shanghai's Songjiang District elemental industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the new molecular sieves, and you hand in hand into the brilliant, for a better future!