The invention relates to a method for preparing a
molecular sieve by using Hangjin 2# soil as a
raw material and a prepared
molecular sieve. The method is used for preparing the
molecular sieve by taking the Hangjin 2# soil as the
raw material and taking
sodium hydroxide as an activating agent through an alkali melting method. The method comprises the following specific steps of: (1), after mixing the Hangjin 2# soil with
sodium hydroxide according to a certain proportion,
roasting and activating; (2), after
grinding a roasted product, mixing the roasted product with water or directly mixing the roasted product with water to prepare a
mixed solution, and adjusting the mol ratio of
silicon atoms to
aluminium atoms of the
mixed solution to 2.5-6.0 by adding or not adding
aluminium sulphate; and (3), crystallizing the
mixed solution prepared in the step (2), wherein the mol ratio of
silicon atoms to
aluminium atoms of the mixed solution meets with requirements. According to the invention, the method is simple and feasible; the material for preparing the molecular
sieve comes from a variety of sources; the preparation cost of the molecular
sieve is low; the purity of the molecular
sieve (P type
zeolite molecular sieve) disclosed by the invention is above 90%; and the method can be widely applied in the fields, such as environment protection,
metallurgy,
chemical industry,
electronics,
petrochemical engineering,
natural gas and the like, in particular
water treatment of
denitrification and dephosphorization.