Shanghai has a new molecular sieve Ltd. Keywords: eutectic; molecular sieve; DME; carbonylation; methyl acetate CLC: TQ426.61, 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 a variety of 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 active centers zeolite, significantly improve the catalytic reaction rate controlled by diffusion, product selectivity, as well as resistant to deactivation pores more easily removed by baking carbon and other characteristics, molecular sieve framework elements can be divided according to type aluminosilicate zeolite molecular sieves and aluminum phosphate backbone heteroatom molecular sieve; Xiaoyi divided by pore size zeolite pore size of less than 2 nm, 2 ~ 50 nm and greater than 50 nm molecular sieve are called micropores, mesopores and large pore molecular sieve. Due to the larger pore zeolite Yuanping, becoming larger size carrier molecules react well, but the pore walls of mesoporous materials are amorphous, resulting in the hydrothermal stability and thermal stability is not yet meet the required petrochemical applications harsh conditions. Gujiao molecular sieve, there is a new molecular sieve (certified), there is a new zeolite molecular sieves by Shanghai Limited. Shanghai new molecular sieve Limited (www.molsionms.com) is Shanghai's Songjiang District, elemental leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. There are new leaders in the molecular sieve with the staff warmly welcome all inquiries negotiations to create new molecular sieve a better future.