What is MCM-41

 MCM-41 is a new type of nano structure material, has featured six party in orderly arrangement, size uniform, pore diameter can be in 2-10 nm range continuous adjustment, high spicific surface etc. Characteristics. MCM-and from the traditional synthesis Molecule sieve synthesis is the biggest characteristic of the template, different, traditional zeolite synthesis of molecular sieve Molecule or small organic Molecule in a single molecular or metal ion for template agent and ZSM-5 as an example, the typical template, for four propyl amine ion, crystal is through the acid salt in the template, around the formation of condensation. And the synthesis of MCM-41 is different, it is in large Molecule molecular surfactants as a template,, template, alkyl chain generally more than 10 carbon atom, about the formation of it has already proposed two mechanism, and continue to improve and perfect. Compared with other zeolite materials, MCM-41 skeleton aluminum species are relatively poor thermal stability, in the roasting process, aluminum frame by frame fall off as a species skeleton aluminum species.Pure silicon MCM-41 itself acid is very weak, as catalytic activity directly is low. Therefore, researchers often the modification, to increase its catalytic activity.
Modification methods include：
(1) synthetic skeleton structure with miscellaneous atomic MCM-41, coordination of the four central skeleton ion such as: A13 +, Cu2 + +, and Zn2 Fe3, +, and Ga3 + from anions and surface center, but through the protons or other transition metal ions to compete so as to form the catalytic activity center.
(2) using in heteropoly acid etc are method, made a series of applicable to different reaction of multiphase catalysts, such as: B acid hydrogen type MCM-41; Doping L acid type MCM-1; Mixed metal oxide alkaline or sexual MCM-41; Bear in PW12, SIW12, such as the PMo12 MCM-41 heterpoly acid; And in SO42 / bear TiO2, ZrO2 / SO42- such as solid super acid type MCM-41.
(3) MCM-41 hole assembly solid in transition metal complex molecules.


Read more: MCM-41 for sale