Preparing method of spherical titanium-aluminum composite carrier
A composite carrier, titanium-aluminum technology, applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of internal alumina migration, reduction of titanium oxide content in small balls, unfavorable problems, etc., and achieve good bonding performance, shorten the production process steps, and realize the effect of industrialized continuous production
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Embodiment 1
[0020] At room temperature, use 15% nitric acid as the bottom liquid, gradually add sodium metaaluminate solution with a solid content of 10-20% by weight based on alumina for reaction under stirring, control the pH at the end point to 6-8.5, and directly carry out plate and frame filtration after the reaction and removing impurities to obtain an alumina hydrogel with a dry basis content of 15-30% by weight.
Embodiment 2
[0022] Take 500g of alumina hydrogel with a dry basis content of 20% prepared according to Example 1; add 20g of anatase titanium dioxide and stir evenly; then slowly add 400g of sodium alginate solution with a concentration of 2% by weight and stir at a high speed to prepare Suspension slurry; drop the suspension slurry into an aluminum nitrate solution with an aluminum ion concentration of 1mol / L to form composite gel particles; take out the gel particles, dry at 120°C for 10 hours, and then bake at 550°C for 4 hours to obtain a spherical shape Titanium-aluminum composite carrier.
[0023] Analyze and characterize the product: particle size: 2.0±0.05mm; average strength: 90N / particle; pore volume: 0.85ml / g; specific surface area: 250m 2 / g.
Embodiment 3
[0025] Take 500 g of alumina hydrogel with a dry basis content of 20% prepared according to Example 1; add 100 g of anatase titanium dioxide, 600 g of sodium alginate solution with a concentration of 3% by weight, and stir at a high speed to uniformly make a suspension slurry; Drop the suspension into an aluminum nitrate solution with an aluminum ion molar concentration of 0.5 mol / L to form composite gel particles; take out the gel particles, dry them at 120°C for 10 hours, and then bake them at 550°C for 4 hours to obtain spherical titanium-aluminum composites. carrier.
[0026] Analyze and characterize the product: particle size: 2.15±0.05mm; average strength: 55N / particle; pore volume: 0.65ml / g; specific surface area: 215m 2 / g.
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