Patent ID: 6013239
Filing Date: 2000-01-11
Classification: B01J,C01B,C07C,Y10S

Abstract:
A method of synthesizing a synthetic porous crystalline material having the structure of ZSM-5 and a composition involving the molar relationship:X.sub.2 O.sub.3 :(n)YO.sub.2,wherein X is a trivalent element; Y is a tetravalent element; and n is greater than about 12, and wherein the crystals have a major dimension of at least about 0.5 micron, said method comprising the steps of forming a reaction mixture containing sources of an alkali or alkaline-earth metal oxide, a trivalent metal oxide X.sub.2 O.sub.3, a tetravalent metal oxide YO.sub.2, water, and an amino acid or salt thereof having the formula: ##STR3## wherein R.sub.1 is NH.sub.2 or a carboxylic acid group or salt thereof; R.sub.2 is alkyl, aryl, alkaryl, NH.sub.2 or NHR.sub.3 where R.sub.3 is an adamantyl or cyclic alkyl group; A is H or a metal and z is from 0 to 15, provided that at least one of R.sub.1 and R.sub.2 is NH.sub.2 or NHR.sub.3, and crystallizing the reaction mixture to produce said porous crystalline material, wherein the surface YO.sub.2 /X.sub.2 O.sub.3 ratio is no more than 20% greater than the bulk YO.sub.02 /X.sub.2 O.sub.3 ratio of the crystal.