Process method of improved 13X molecular screen
A molecular sieve, an improved technology, applied in the chemical industry, can solve the problem of low packing density of molecular sieves
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[0028] In the preparation method of the improved 13X molecular sieve, the synthesis of the molecular sieve adopts a hydrothermal synthesis process and a Barrer non-equilibrium synthesis method. The molecular sieve is a metastable phase produced under non-equilibrium conditions. When using sodium silicate as a silicon source and When sodium aluminate is used as the aluminum source, the silicate in the liquid phase has different polymerization states, and the aluminate and aluminosilicate have different structures and states. The metastable phase produced during the synthesis of zeolite is unstable and easily Therefore, although the synthesis operation process is not complicated, there are many factors affecting the synthesis; in alkaline medium, silicate and aluminate polymerize into gel, and after hydrothermal crystallization, a certain pore structure, Zeolite molecular sieve with certain pore diameter:
[0029]
[0030] For example: Na·Al 2 o 3 ·2~3SiO2 2 ·6H 2 O X typ...
Embodiment
[0056] According to the ratio of ingredients: molar ratio
[0057] Na 2 O / Al 2 o 3 3.0~4.0
[0058] SiO 2 / Al 2 o 3 2.5~3.0
[0059] h 2 O / Al 2 o 3 30~40
[0060] Synthesis: aging and crystallization According to the given process formula and process conditions, calculate the dosage of various materials, according to the order of feeding, after feeding into gel, transfer to the crystallization tank for aging, after aging, heat up and crystallize , according to the specified crystallization time, after the crystallization is completed, the material is discharged;
[0061] Filtration: Filter the synthesized slurry through a plate and frame filter to achieve solid-liquid separation, and recycle the remaining NaOH mother liquor, then wash with water to PH 10-11, wind pressure drainage, and discharge;
[0062] Drying: Add the air-pressed filter cake to the flash drying equipment to dry and remove the wet water, so as to ensure that t...
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