A kind of manufacturing method of molecular sieve active powder suitable for polyurethane system
A manufacturing method, molecular sieve technology, applied in chemical instruments and methods, fibrous fillers, dyed organic silicon compound treatment, etc., can solve the problems of static water capacity decline, cumbersome process, etc., achieve reduced adsorption, good dispersion performance, and extended application period effect
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Embodiment 1～6
[0022] Weigh 2.5 kg of 4A molecular sieve powder with a particle size distribution of 1-15 microns, add 8 kg of 0.7 mol / l potassium chloride solution to prepare a 20% solid content slurry, stir at 60°C for 1 hour, and then centrifugally filter , the filter cake is ion-exchanged again under the same conditions as above, centrifugally filtered, the filter cake is washed with deionized water until there is no chloride ion, and then dried at 80°C to constant weight to obtain a potassium ion exchange degree of 55%. 3A molecular sieve powder. Prepare 6 parts of 500g 30% solid content 3A molecular sieve slurry, add different types of surface modifiers to each part, stir evenly, heat to 50°C, stir for 1 hour, centrifugal filter, and dry the filter cake directly until the water content is 15 %, when roasting, it is set as a temperature program. The sample stays at 200°C for 30 minutes, at 350°C for 80 minutes, and finally at 550°C for 8 minutes. Take out the vacuum cooling to obtain th...
Embodiment 7
[0034] Using 4A molecular sieve powder as raw material, the chemical composition of 4A molecular sieve powder is 1.0±0.2Na 2 O: Al 2 o 3 : 1.85±0.5SiO2 2 :yH 2 O, the value of y is 0, using soluble potassium salts such as potassium chloride, potassium nitrate, and potassium sulfate to exchange potassium with 4A molecular sieve to prepare a 3A molecular sieve with a potassium ion exchange degree of 35%.
[0035] The prepared 3A molecular sieve powder has a particle size distribution of 1-15 microns, a silicon-aluminum ratio of 0.95:1, is dispersed with deionized water, and has a solid content of 20%. Control the temperature of the slurry at 50°C. During the stirring process, add a certain amount of surface modifier, such as silicone coupling agent, titanate coupling agent, silicone resin, silicone rubber, sodium methyl silicate, etc. The addition amount of the surface modifier is 0.5% of the weight of the 3A molecular sieve on a dry basis. The treatment time for surface mo...
Embodiment 8
[0038] Using 4A molecular sieve powder as raw material, the chemical composition of 4A molecular sieve powder is 1.0±0.2Na 2 O: Al 2 o 3 : 1.85±0.5SiO2 2 :yH 2 The value of O and y is from 6, and soluble potassium salts such as potassium chloride, potassium nitrate, and potassium sulfate are exchanged with 4A molecular sieve potassium ion to prepare a 3A molecular sieve with a potassium ion exchange degree of 80%.
[0039] The prepared 3A molecular sieve powder has a particle size distribution of 1-15 microns, a silicon-aluminum ratio of 1.1:1, is dispersed with deionized water, and has a solid content of 40%. Control the temperature of the slurry at 60°C. During the stirring process, add a certain amount of surface modifier, such as silicone coupling agent, titanate coupling agent, silicone resin, silicone rubber, sodium methyl silicate, etc. The addition amount of the surface modifier is 3.0% of the weight of the 3A molecular sieve on a dry basis. The treatment time for...
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