Titanium oxide - aluminum oxide composite carrier, preparation method and application thereof
A composite carrier, titanium oxide technology, used in catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of poor cohesion of the product, inability to form, and severe neutralization reaction, and achieve pressure resistance and Strong wear resistance, simple and convenient preparation method, avoiding the effect of exothermic reaction
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Embodiment 1
[0048] Example 1 Preparation of titania-alumina composite carrier
[0049] 1) Preparation of NaAlO 2 Solution: Weigh 171.25 grams of sodium hydroxide, add 237.5 grams of water to dilute, and react with 192.5 grams of aluminum hydroxide in a three-necked flask at 105°C-110°C for 3-5 hours, then add deionized water to make a 500ml solution, Concentration is 25wt%, filter while hot to remove the impurity entrained by raw material, filtrate is NaAlO 2 solution.
[0050] 2) TiCl 4 Solution 22ml (TiO 2 Concentration: 25g / 100ml) and AlCl 3 ·6H 2 O crystal 123g mixed, adding deionized water to dilute to 333ml; 93.5ml NaAlO 2 The solution was diluted to 333ml with deionized water; under stirring, the titanium aluminum solution was mixed with NaAlO 2 The solution was poured into a four-necked flask at a flow rate of 20 ml / min at a temperature of 40° C. to carry out co-precipitation reaction. After the reaction, add ammonia water to adjust the final pH to 9, and directly filter a...
Embodiment 2
[0054] Using the same method as in Example 1, get TiCl 4 Solution 48.7ml, change titania content, prepare titania-alumina composite carrier, obtain the carrier B that titania content is 20wt%, its physical property parameter is as follows: surface area is 23m 2 / g, the total pore volume is 0.40cm 3 / g, the average pore diameter is 34.5nm, and the mechanical strength is 85N / particle. The carrier only has L acid, no B acid, the total acid content is 1.2A / g / cm2, and the carrier crystal form is α-Al according to XRD 2 o 3 , anatase TiO 2 .
Embodiment 3
[0056] Using the same method as in Example 1, get TiCl 4 Solution 83ml, change titania content, prepare titania-alumina composite carrier, obtain the carrier C that titania content is 30wt%, its physical property parameter is as follows: surface area is 20m 2 / g, the total pore volume is 0.48cm 3 / g, the average pore diameter is 46.5nm, and the mechanical strength is 80N / particle. The carrier only has L acid, no B acid, the total acid content is 1.4A / g / cm2, and the carrier crystal form is α-Al according to XRD 2 o 3 , anatase and rutile TiO 2 .
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