Japan CDS-1 successfully developed a new type of molecular sieve

Recently, Xiao Bian understand a message from the Japanese National Institute of Advanced Industrial Science and Technology (AIST) synthesis of a novel zeolite CDS-1 has been successfully developed.
 It was prepared by a layered silicate, ceca molecular sieves has a unique structure - by molecular stacking blocks.  According to the institute, said the film chemistry lab, CDS-1 between its silicate layers has many pores.  Research center will work processing CDS-1 into the film, mainly used for the separation agent catalyst.  Typically, the use of a structure-directing agent (Structure-directing agent) complex can be formed by hydrothermal synthesis of nanosized pore size.  These pores may be at about 420 ℃, using condensation polymerization method easily and economically be bonded together to form a silicate layer.

 This made one molecular structure but retain the layered silicate framework is without precedent.  Molecular sieves containing silicon, aluminum and oxygen atoms.  When the silica-alumina composite containing a high proportion of silicon, called a high-silica grace molecular sieves. This kind of molecular sieve is hydrophobic and high temperature.  AIST has a molecular sieve such intellectual property rights, the Department of silicon and oxygen by a silicate system.  It is resistant to high temperature above 800 ℃ and chemical resistance.  When immersed in a solution of an acid or a base, and still retains its original structure.

Aluminosilicate compound

Aluminosilicate compound having a cubic lattice, the alumina is mainly composed of the open connection through an oxygen bridge skeleton structure, there are a lot of uniform pore size and pore structure grace molecular sieves  are arranged neatly, the inner surface area of ​​a large hole. Also contains a lower price and ionic radius larger metal ions and compounds of state water. As water molecules in the continuous loss of heat, molecular sieve manufacturers  but the same crystal framework structure, the formation of many of the same size of the cavity, the cavity of the same diameter,molecular sieve drying, there are many pores are connected, the diameter of these small pores of uniform size, pore ratio can adsorption of molecules having a small diameter into the interior cavities in the regeneration of molecular sieves  past, but have the molecules larger than the pore exclusion, different shapes can thus molecular diameters, different degrees of polarity of the molecule, molecules having different boiling points and different degree of saturation of molecular separation open, that has the effect of "screening" of molecules, so called molecular sieves. Currently zeolite widely used in metallurgy, chemical industry, electronics, petrochemical and natural gas industries.