Preparation method of 5A molecular sieve adsorbent
A molecular sieve and adsorbent technology, applied in the field of preparation of spherical adsorbents, can solve the problems of lower adsorption capacity, lower adsorption selectivity and adsorption and 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 raw powder and 8kg of CaO fine powder (purity: 99% by mass) with a particle size less than 50 μm and mix them uniformly to form a mixed powder. Take 45kg of mixed powder and put it into a high-speed granulator, spray 25kg of deionized water while rolling and sprinkle the remaining mixed powder, sieve the formed pellets, and take pellets with a particle size of 0.3-0.8mm in 100 Dry at ℃ for 4 hours, roast at 550℃ for 4 hours, wash with deionized water at 90℃ until the pH of the washing solution is less than 10, dry at 80℃ for 4 hours, and activate in air at 350℃ for 3 hours 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: 99% by mass) with a particle size less than 50 μm and mix them uniformly to form a mixed powder. Put 40kg of mixed powder into the sugar coating pan, spray 27kg of deionized water while rolling and sprinkle the remaining mixed powder, sieve the formed pellets, take pellets with a particle size of 0.3-0.8mm and dry at 110°C 4h, roasted at 570°C for 3.5h, then washed with deionized water at 95°C until the pH of the washing solution was less than 10, dried at 80°C for 4h, and activated in air at 400°C for 2h to prepare 5A molecular sieve adsorbent A-2, whose physical and chemical properties are shown in the table 1.
example 3
[0034] Get 50kg of NaA molecular sieve former powder, 15kg of CaO fine powder (purity is 99% by mass) and 20kg of deionized water with a particle size less than 50 μm and mix evenly, then press it into a tablet form with a rotary tablet press at 100MPa, crush and sieve, Take particles with a particle size of 0.3-0.8 mm, dry at 120°C for 3 hours, bake at 600°C for 2.5 hours, wash with deionized water at 93°C until the pH of the washing solution is less than 10, dry at 80°C for 4 hours, and activate in air at 450°C for 2 hours , and obtained 5A molecular sieve adsorbent A-3, whose physicochemical properties are shown in Table 1.
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