Preparation method and application of acid modified attapulgite clay catalyst
A technology for attapulgite clay and catalyst, which is applied in the field of preparation of attapulgite catalyst, can solve the problems of blocking pores, catalyst deactivation and the like, and achieves the effect of simple preparation and good industrial application prospect.
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[0015] Example 1:
[0016] Weigh 200g of commercial attapulgite clay, add 100g of 13% sulfuric acid aqueous solution (the mass ratio of sulfuric acid to water is 0.15:1), activate it at a reaction temperature of 80°C for 10 hours, and suspend the activated attapulgite clay sulfuric acid in Dry at 120°C for 0.5 hours. The dried powder is calcined at 450°C for 8 hours to prepare an acid-modified attapulgite clay catalyst. The SO content is measured. 4 2- The content is 5.0%. Load the prepared acid-modified attapulgite clay catalyst into a fixed-bed reactor, control the reaction temperature to be 180℃, and the liquid hourly space velocity to be 6h -1 The ratio of bromine index is 300mgBr / 100g mixed aromatics, the bromine index of the product after the reaction is 15.66mgBr / 100g.
Example Embodiment
[0017] Example 2:
[0018] Weigh 200g of commercial attapulgite clay, add 400g of 2% sulfuric acid aqueous solution (the mass ratio of sulfuric acid to water is 0.02:1), activate it at a reaction temperature of 25°C for 24 hours, and suspend the activated attapulgite clay sulfuric acid in Dry for 6 hours at 150°C, and calcinate the dried powder at 350°C for 0.5 hours to prepare acid-modified attapulgite clay catalyst. The SO content is measured. 4 2- The content is 2.8%. The prepared acid-modified attapulgite clay catalyst was put into a fixed-bed reactor, the reaction temperature was controlled to 200℃, and the liquid hourly space velocity was 3h -1 The ratio of bromine index is 300mgBr / 100g mixed aromatics, the bromine index of the product after the reaction is 7.88mgBr / 100g.
Example Embodiment
[0019] Example 3:
[0020] Weigh 200g of commercial attapulgite clay, add 100g of a 2% sulfuric acid aqueous solution (the mass ratio of sulfuric acid to water is 0.02:1), and activate it at a reaction temperature of 50°C for 12 hours. The activated attapulgite clay is suspended in sulfuric acid Drying at 120°C for 3 hours, and calcining the dried powder at 500°C for 4 hours to prepare acid-modified attapulgite clay catalyst. The SO content is measured. 4 2- The content is 0.2%. The prepared acid-modified attapulgite clay catalyst was put into a fixed-bed reactor, the reaction temperature was controlled to 220℃, and the liquid hourly space velocity was 2h -1 The ratio of bromine index is 300mgBr / 100g mixed aromatics, the bromine index of the product after the reaction is 18.67mgBr / 100g.
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