A kind of preparation method of molecular sieve desiccant for natural gas dehydration
A molecular sieve and natural gas technology, applied in the field of preparation of molecular sieve desiccant for natural gas dehydration, can solve the problems of low crystallinity of molecular sieve desiccant, unstable product quality, uneven activation of raw materials, etc. Improve the effectiveness of organizational structure
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[0030] The preparation method of the molecular sieve desiccant provided in the embodiment of the present invention is to grind the kaolin raw material to be below 2 μm, perform fluidized roasting in a fluidized bed, add aluminum source and sodium source and mix to form a slurry, so as to ensure that the SiO 2 / Al 2 o 3 The molar ratio of SiO is 1.7~2.1:1, SiO 2 / Na 2 O molar ratio is 0.6~0.9:1, H 2 O / Na 2 The molar ratio of O is 30-50:1, and then the slurry is aged, hydrothermally crystallized, solid-liquid separated, and the separated solid product is washed and dried to obtain a molecular sieve powder. Afterwards, an acid-resistant binder is added to the raw molecular sieve powder for molding treatment, and after drying, it is roasted again to obtain a molecular sieve desiccant for natural gas dehydration. The molecular sieve desiccant for natural gas dehydration prepared by the method has the advantages of high crystallinity, high static water absorption, acid gas res...
Embodiment 1
[0045] Grind soft kaolin to an average particle size of 1.5 μm; then place it in a fluidized bed at 800°C for 2 hours in fluidized roasting; after cooling, take out the fluidized roasted minerals and add them together with sodium aluminate Sodium hydroxide solution, stirring evenly to form a slurry. Wherein, the molar ratio of silicon to aluminum in the slurry is 2.0:1, the molar ratio of silicon to sodium is 0.8:1, and the molar ratio of water to sodium is 45:1, and the slurry is aged at room temperature (25°C) for 24 hours; then Place the aged slurry in a crystallization reactor, stir vigorously at a stirring speed of 150r / min, and conduct hydrothermal crystallization at 100°C for 3 hours; after the crystallized product is cooled, the solid-liquid After separation, a solid product was obtained, and the solid was washed three times with deionized water, and then dried in an oven at 120° C. for 2 hours to obtain a molecular sieve powder. The former powder of molecular sieve i...
Embodiment 2
[0048] Grind soft kaolin to an average particle size of 1.8 μm, then place it in a fluidized bed at 850°C for fluidized roasting for 2 hours, take out the fluidized roasted minerals after cooling, and add them together with sodium aluminate Sodium bicarbonate solution, stirring evenly to form a slurry. Wherein, the molar ratio of silicon to aluminum in the slurry is 1.9:1, the molar ratio of silicon to sodium is 0.8:1, and the molar ratio of water to sodium is 39:1. The slurry was aged at room temperature (23°C) for 24 hours, then the aged slurry was placed in a crystallization reactor, stirred vigorously at a stirring speed of 160r / min, and hydrothermally crystallized at 100°C 4 hours; after the crystallized product is cooled, the solid-liquid separation is carried out by suction filtration to obtain a solid product, and the solid is washed with deionized water for 3 times, and then dried in an oven at 120°C for 2 hours to obtain a molecular sieve Original powder. Subsequen...
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