Patent ID: 8715618

Claim:
A process for preparing a copper-containing zeolitic material having a CHA framework structure, the process comprising: (i) preparing an aqueous solution comprising at least one source for X 2 O 3 , at least one source for YO 2 , at least one structure directing agent suitable for preparing a zeolitic material having a CHA framework structure, and at least one Cu source, wherein said aqueous solution does not comprise a phosphor source and has an alkali metal content of 1000 ppm or less; and (ii) hydrothermally crystallizing the aqueous solution of the preparing (i) which does not comprise a phosphor source, to obtain a suspension comprising the copper-containing zeolitic material having a CHA framework structure; wherein the structure directing agent is a mixture of 1-adamantyltrimethyl-ammonium hydroxide and benzyltrimethylammonium hydroxide, or a mixture of 1-adamantyltrimethylammonium hydroxide and tetramethylammonium hydroxide, or a mixture of 1-adamantyltrimethylammonium hydroxide and tetramethylammonium hydroxide, or a mixture of 1-adamantyltrimethylammonium hydroxide and benzyltrimethylammonium hydroxide and tetramethylammonium hydroxide, wherein a molar ratio of 1-adamantyltrimethylammonium hydroxide to benzyltrimethylammonium hydroxide or to tetramethylammonium hydroxide, or to a sum of benzyltrimethylammonium hydroxide and tetramethylammonium hydroxide, is in a range of from 1:5 to 1:1, and wherein the copper-containing zeolitic material has a composition comprising a molar ratio ( n YO 2 ):X 2 O 3 wherein X is a trivalent element, Y is a tetravalent element, and n is at least 10.