A kind of preparation method of 5a molecular sieve adsorbent
A molecular sieve and adsorbent technology, applied in the field of spherical adsorbent preparation, can solve the problems of reduced adsorption capacity, reduced adsorption selectivity and adsorption-desorption rate, etc., and achieve high methanol adsorption capacity, high compressive strength, and mass transfer efficiency high effect
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example 1
[0030] Take 50kg of NaA molecular sieve original powder and 8kg of CaO fine powder (purity of 99% by mass) with a particle size of less than 50 μm and mix uniformly to form a mixed powder. Take 45kg of mixed powder into the high-speed granulator, spray 25kg of deionized water and throw the remaining mixed powder while rolling, sieve the formed pellets, and take the pellets with a particle size of 0.3~0.8mm into 100 Drying at ℃ for 4h, roasting at 550℃ for 4h, then washing with deionized water at 90℃ until the pH of the washing solution is less than 10, drying at 80℃ for 4h, and activating in air at 350℃ for 3h to prepare 5A molecular sieve adsorbent A-1. Its physical and chemical properties See Table 1.
example 2
[0032] Take 50kg of NaA molecular sieve raw powder and 10kg of CaO fine powder (purity of 99% by mass) with a particle size of less than 50μm and mix uniformly to form a mixed powder. Take 40kg of mixed powder into the sugar-coating pan, spray 27kg of deionized water while rolling and throw the remaining mixed powder, sieve the formed pellets, and take pellets with a particle size of 0.3~0.8mm and dry at 110℃ 4h, roasted at 570℃ for 3.5h, washed with 95℃ deionized water until the pH of the washing solution was less than 10, dried at 80℃ for 4h, activated in the air at 400℃ for 2h to prepare 5A molecular sieve adsorbent A-2, its physical and chemical properties are shown in the table 1.
example 3
[0034] Take 50kg of NaA molecular sieve powder, 15kg of CaO fine powder (purity of 99% by mass) with a particle size of less than 50μm, and 20kg of deionized water and mix them evenly, then use a rotary tablet press to compress them into tablets at 100MPa, crush and screen them, Take particles with a particle size of 0.3~0.8mm, dry at 120℃ for 3h, roast at 600℃ for 2.5h, then wash with 93℃ deionized water until the pH value of the washing solution is less than 10, dry at 80℃ for 4h, activate in the air at 450℃ for 2h , Prepared 5A molecular sieve adsorbent A-3, its physical and chemical properties are shown in Table 1.
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