NOVEL MICROPOROUS CRYSTALLINE MATERIAL COMPRISING MOLECULAR SIEVE OR ZEOLITE HAVING 8-RING PORE OPENING STRUCTURE AND METHOD OF MAKING AND USING THE SAME

PROBLEM TO BE SOLVED: To provide a microporous crystalline material having high stability to hydrothermal treatment and the SCR method of NOx in exhaust gas. SOLUTION: There is disclosed a hydrothermally stable microporous crystalline material comprising a molecular sieve or zeolite having an 8-ring pore opening structure, such as SAPO or aluminosilicate zeolite and retaining at least 80% of its surface area and micropore volume after exposure to temperatures of up to 900°C in the presence of up to 10 volume percent water vapor for a time ranging from 1 to 16 hours. Methods of using the disclosed crystalline material, such as in the SCR of NOx in exhaust gas are also disclosed, as are methods of synthesizing such materials. COPYRIGHT: (C)2011,JPO&INPIT ...

８員環細孔開口構造を有するモレキュラーシーブまたはゼオライトを含んで成る新規マイクロポーラス結晶性物質およびその製法およびその使用