A kind of silicoaluminophosphate composite molecular sieve and preparation method thereof
A technology of composite molecular sieve and silicoaluminophosphate, which is applied in the field of preparation of the above-mentioned composite molecular sieve, can solve the problems of no acidity, limited application of catalytic reaction, no charge that can be exchanged, etc., and achieves the effect of wide application prospect.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0045] Weigh 70g of pseudo-boehmite, dissolve in 200g of deionized water, stir and mix evenly; weigh 130g of phosphoric acid, dissolve in 100g of deionized water, mix evenly; add the phosphoric acid solution dropwise to the pseudo-boehmite in a stirring state The solution forms a precursor mixture A; A is aged at 10°C for 4 hours; weigh 57g of diisopropylamine, add it dropwise to A, and stir evenly; then weigh about 45g of silica sol (30wt%), and add it dropwise to A , and stir evenly to form precursor mixture B; put B into a reaction kettle with a volume of 1L, and start crystallization at a temperature of 200°C for 24 hours; after the crystallization is completed, wash and filter the product until the filtrate is Neutral, the filtered product was dried in an oven at 120°C for 24 hours to obtain a silicon-aluminum phosphate composite molecular sieve. Its X-ray diffraction spectrum is attached as image 3 , the acidic characterization results are attached Figure 4 The X-ray...
Embodiment 2
[0047] Weigh 70g of pseudo-boehmite, dissolve in 200g of deionized water, stir and mix evenly; weigh 130g of phosphoric acid, dissolve in 100g of deionized water, mix evenly; add the phosphoric acid solution dropwise to the pseudo-boehmite in a stirring state The solution forms a precursor mixture A; A is aged at 0°C for 2 hours; weigh 57g of di-n-propylamine, add it dropwise to A, and stir evenly; then weigh about 45g of silica sol (30wt%), and add it dropwise to A , and stir evenly to form precursor mixture B; put B into a reaction kettle with a volume of 1L, and start crystallization at a temperature of 200°C for 24 hours; after the crystallization is completed, wash and filter the product until the filtrate is Neutral, the filtered product was dried in an oven at 120°C for 20 hours to obtain a silicon-aluminum phosphate composite molecular sieve. The X-ray diffraction peak positions are summarized in Table 2.
Embodiment 3
[0049] Weigh 70g of pseudo-boehmite, dissolve in 200g of deionized water, stir and mix evenly; weigh 130g of phosphoric acid, dissolve in 100g of deionized water, mix evenly; add the phosphoric acid solution dropwise to the pseudo-boehmite in a stirring state The solution forms a precursor mixture A; A is aged at 0°C for 8 hours; weigh 57g of di-n-propylamine, add it dropwise to A, and stir evenly; then weigh about 23g of silica sol (30wt%), and add it dropwise to A , and stir evenly to form precursor mixture B; put B into a reaction kettle with a volume of 1L, and start crystallization at a temperature of 200°C for 24 hours; after the crystallization is completed, wash and filter the product until the filtrate is Neutral, the filtered product was dried in an oven at 120°C for 18 hours to obtain a silicon-aluminum phosphate composite molecular sieve. The X-ray diffraction peak positions are summarized in Table 2.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More