P-A type molecular sieve prepared from spontaneously combustible coal gangue, and preparation method thereof

The invention discloses P-A type molecular sieve prepared from spontaneously combustible coal gangue, and a preparation method thereof, and belongs to the field of porous material synthesis. The specific surface area of the P-A type molecular sieve prepared from spontaneously combustible coal gangue ranges from 4.5 to 6.5m *g, and the particle size ranges from 3.18 to 4.25m. The preparation method comprises following steps: sodium aluminate and grinded spontaneously combustible coal gangue are added into a sodium hydroxide aqueous solution respectively, an obtained mixture is subjected to heating, cooling, solid liquid separation, and drying so as to obtain the P-A type molecular sieve; the raw materials are cheap and easily available; operation conditions are mild; the purity ofthe prepared P-A type molecular sieve is relatively high, reaches 50 to 65%; a new approach is provided for coal gangue resource utilization, refining, and high efficiency utilization; waste is changed into valuables; and environm