Catalyst for producing chlorine by catalytic oxidation of hydrogen chloride, preparation method and application thereof
A technology of catalytic oxidation and hydrogen chloride, applied in the direction of preparation of chloride, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as catalyst corrosion, catalyst bed blockage, activity decline, etc.
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Embodiment 1
[0035] The preparation steps of the catalyst carrier with a silica content of about 35% are as follows:
[0036] Add 1000g of water to 100g of alumina powder to form a slurry, and heat the slurry to 95°C; add about 290g of sodium silicate solution (15% based on silica content) to the oxidation chamber at a flow rate of 3mL / min. In the aluminum slurry, keep the slurry temperature at 95°C, stir for 60min; within 30min, add 1mol L -1 hydrochloric acid to reduce the pH of the slurry to 7.5; then wash the slurry with 1% by weight ammonium carbonate solution to remove residual sodium, and dry the filter cake formed after filtration at a temperature of 100°C. The powder was calcined at 650°C for 7h.
[0037] Mix the above-mentioned treated powder with about 46g of silica sol (25% by weight of silicon dioxide), then add about 62g of water, 5g of citric acid, and 8g of methylcellulose to the mixture, and mix, Then it is extruded on an extruder, dried at a temperature of 100°C for 5 h...
Embodiment 2
[0046] The preparation method of the catalyst carrier with a silica content of about 29% is different from Example 1 in that about 196 g of sodium silicate solution is added to the alumina slurry.
[0047] Catalyst preparation steps are as follows:
[0048] 30gCuCl 2 2H 2 O, 15gLaCl 3 ·7H 2 O and 10g KCl were dissolved in 40mL deionized water, then 60g of the prepared catalyst carrier was added, and finally stirred at a constant temperature for 1h at a temperature of 80°C, kept at a constant temperature for 10h at a temperature of 50°C, dried at a temperature of 100°C for 16h, and Calcined at 550°C for 4 hours in air to obtain the catalyst.
[0049] Wherein: the catalyst, in terms of element weight percentage, contains:
[0050]
[0051] The catalytic reaction process conditions are the same as in Example 1.
[0052] After 25 hours of reaction, the conversion rate of hydrogen chloride was 79.5%, and after 1000 hours of reaction, the conversion rate of hydrogen chlorid...
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