| abstract |
(57) Summary The structure of ZSM-5 and the following molar relationships: Wherein X is a trivalent element, Y is a tetravalent element, and n is greater than about 12, in a synthetic porous crystalline material having a composition comprising at least 0.5 micron having major dimensions and YO 2 / X 2 O 3 ratio of 20% or less lower surface skeletal than YO 2 / X 2 O 3 ratio of the crystal bulk framework. Substances are synthesized using amino acids as directing agents. |