Low-silicon X-type molecular sieve and A-type molecular sieve and preparation method thereof

The invention provides a low-silicon X-type molecular sieve, a low-silicon A-type molecular sieve and a preparation method thereof, and belongs to the technical field of porous materials. The preparation method comprises the following steps: mixing potassium feldspar with sodium carbonate, and calcining to obtain activated potassium feldspar; mixing sodium metaaluminate, sodium metasilicate, sodium hydroxide, potassium hydroxide and water to obtain seed crystal guiding glue; mixing water, sodium hydroxide, sodium metaaluminate, the activated potassium feldspar and the seed crystal guiding glue, and sequentially performing aging and crystallization to obtain the low-silicon X-type molecular sieve, or mixing water, sodium hydroxide, sodium metaaluminate and activated potassium feldspar, and performing crystallization to obtain the A-type molecular sieve. The low-silicon X-type molecular sieve and the low-silicon A-type molecular sieve are prepared by adopting the potassium feldspar as the raw material, the prep