Catalyst for preparing olefins with corresponding carbon numbers by dehydration of C6~C10 alcohols
An alcohol dehydration and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbon production from oxygen-containing organic compounds, etc., can solve problems such as poor stability of dehydration catalysts, and achieve good Stability and longevity, the effect of reducing the rate of carbon deposition
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Embodiment 1
[0029] Weigh 200 grams of pseudo-boehmite in a kneader, add 2 grams of fenugreek powder and knead for 30 minutes, add 60 ml of 0.5w% lithium acetate aqueous solution dropwise, add 200 ml of 0.5w% nitric acid aqueous solution and knead for 30 minutes, extrude Shaped, dried at 120°C for 12 hours, and roasted at 550°C for 10 hours to obtain catalyst A with a length of 5 mm and a diameter of 3 mm. Al in the catalyst 2 o 3 The parts by weight are 99.95 parts, Li 2 O parts by weight are 0.05 parts. For ease of comparison, the composition of the catalysts is listed in Table 1.
[0030] The performance evaluation of the catalyst was carried out in a fixed-bed tubular reactor (Ф25×500 mm stainless steel), the catalyst loading was 10 ml, and the reaction time was 100 hours. The reaction products were analyzed by Agilent4890 gas chromatograph after gas-liquid separation. The reaction conditions and reaction results are shown in Table 2.
Embodiment 2
[0032] Weigh 200 grams of pseudo-boehmite in a kneader, add 2 grams of glycerin and knead for 30 minutes, add dropwise 60 milliliters of 20w% lithium acetate aqueous solution, add 200 milliliters of 0.5w% citric acid aqueous solution and knead for 30 minutes, extrude into strips, Dry at 150° C. for 10 hours, and bake at 700° C. for 5 hours to obtain catalyst B with a length of 5 mm and a diameter of 3 mm. Al in the catalyst 2 o 3 The parts by weight are 98.08 parts, Li 2 O parts by weight are 1.92 parts. For ease of comparison, the compositions of the catalysts are listed in Table 1.
[0033] The performance evaluation of the catalyst was carried out in a fixed-bed tubular reactor (Ф25×500 mm stainless steel), the catalyst loading was 10 ml, and the reaction time was 100 hours. The reaction products were analyzed by Agilent4890 gas chromatograph after gas-liquid separation. The reaction conditions and reaction results are shown in Table 2.
Embodiment 3
[0035] Weigh 200 grams of pseudoboehmite in a kneader, add 2 grams of graphite and knead for 30 minutes, add dropwise 10 ml of 15w% lithium acetate aqueous solution, add 200 ml of 0.5w% oxalic acid aqueous solution and knead for 30 minutes, and extrude , dried at 140°C for 10 hours, and calcined at 650°C for 15 hours to obtain a catalyst C with a length of 5 mm and a diameter of 3 mm. Al in the catalyst 2 o 3 The parts by weight are 99.76 parts, Li 2 O parts by weight are 0.24 parts. For ease of comparison, the composition of the catalysts is listed in Table 1.
[0036] The performance evaluation of the catalyst was carried out in a fixed-bed tubular reactor (Ф25×500 mm stainless steel), the catalyst loading was 10 ml, and the reaction time was 100 hours. The reaction products were analyzed by Agilent4890 gas chromatograph after gas-liquid separation. The reaction conditions and reaction results are shown in Table 2.
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