Catalyst for regenerating anthraquinone degraded product, preparation method thereof and method for regenerating anthraquinone degraded product
A degradation product and catalyst technology, which is applied in the preparation of organic compounds, physical/chemical process catalysts, quinone preparation, etc., can solve the problems of reducing the regeneration efficiency of clay for degradation products, and achieves improved regeneration effect, increased increase, and improved production. The effect of efficiency
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[0012] The first aspect of the present invention provides a method for preparing a catalyst for regenerating anthraquinone degradation products, comprising: first impregnating alumina with a solution containing alkaline earth metal salts and silicon sources to obtain the first solid product, and then performing the second step in sequence - drying and first calcining; alternatively, a second impregnation of alumina with a solution containing a silicon source followed by drying to obtain a first product, said first product being subjected to a third impregnation with a solution containing an alkaline earth metal salt, A second solid product is obtained, followed by a second drying and a second calcination in sequence.
[0013] According to the method of the present invention, the consumption of alkaline earth metal salt, silicon source and alumina makes in the prepared catalyst, relative to 100 parts by weight of alumina, the content of alkaline earth metal oxide is 0.5-40 parts...
Embodiment 1
[0038] 50.5g calcium nitrate tetrahydrate and 13.3g silica sol (SiO 2 content of 30% by weight) and water to prepare 120mL of impregnating liquid, which was added dropwise to 200.0g of alumina under stirring conditions, impregnated at 35°C for 4h, and then rotary evaporated at 60°C for 2h to remove excess The obtained solid was dried at 100°C for 8 hours; then raised to 120°C at a heating rate of 5°C / min, kept for 1 hour, then raised to 500°C at a heating rate of 4°C / min, kept for 5 hours for roasting, and obtained The catalyst for regenerating anthraquinone degradation products is denoted as C1.
[0039] The catalyst contains alumina, calcium dioxide (alkaline earth metal oxide) and silicon dioxide, relative to 100 parts by weight of alumina, the content of calcium dioxide is 6 parts by weight, and the content of silicon dioxide is 2 parts by weight.
[0040] The total pore volume of the catalyst is 0.42mL / g; the specific surface area is 224m 2 / g.
Embodiment 2
[0042] 75.8g calcium nitrate tetrahydrate and 13.3g silica sol (SiO 2 content of 30% by weight) and water to prepare 130mL of impregnating liquid, which was added dropwise to 200.0g of alumina under stirring conditions, impregnated at 25°C for 6h, and then rotary evaporated at 50°C for 3h to remove excess The obtained solid was dried at 90°C for 12 hours; then raised to 110°C at a heating rate of 2°C / min, kept for 2 hours, then raised to 400°C at a heating rate of 2°C / min, kept for 6 hours for roasting, and obtained The catalyst for regeneration of anthraquinone degradation products is denoted as C2.
[0043] The catalyst contains alumina, calcium dioxide (alkaline earth metal oxide) and silicon dioxide, relative to 100 parts by weight of alumina, the content of calcium dioxide is 9 parts by weight, and the content of silicon dioxide is 2 parts by weight.
[0044] The total pore volume of the catalyst is 0.39mL / g; the specific surface area is 202m 2 / g.
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