Catalyst for preparing ethane and hexane through butene disproportionation
A catalyst, catalyst carrier technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low selectivity of ethylene and hexene and high reaction temperature
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Embodiment 1
[0022] Weigh 50 grams of γ-Al after roasting and drying 2 o 3 (the specific surface area is 278 square meters per gram), put it into a dry glass beaker, accurately measure 43 milliliters of rhenium with a pipette and put it in another beaker, and then add 7 ml of deionized water, and stir well.
[0023] Quickly pour the above perrhenic acid solution into the γ-Al 2 o 3 In a beaker, stir well and let stand for 4 hours, and dry at 120°C for 10 hours. Place the above-mentioned prepared sample in a tube furnace and feed dry air, the gas flow rate is controlled at 1000 mg / min, the temperature is raised to 550°C at a rate of 10°C / min and roasted, and kept for 8 hours, the obtained rhenium content is 6%. Re 2 o 7 / Al 2 o 3 Catalyst samples.
Embodiment 2
[0025] Weigh 50 grams of γ-Al after roasting and drying 2 o 3 (the specific surface area is 278 square meters per gram), put into a dry glass beaker, and accurately measure the concentration of 50 milliliters of rhenium with a pipette and be that the perrhenic acid aqueous solution of 70 milligrams per milliliter is placed in another beaker. Quickly pour the above perrhenic acid solution into the γ-Al 2 o 3 In a beaker, stir well and let stand for 4 hours, and dry at 120°C for 10 hours.
[0026] Accurately measure 7 milliliters of rhenium perrhenic acid aqueous solution with a concentration of milligrams per milliliter with a pipette and place it in a beaker, then add deionized water to make the solution volume 50 milliliters. The second impregnation was carried out as above and dried at 120°C for 10 hours. Carry out catalyst sample roasting by the method described in embodiment 1, the content of making rhenium is 8% Re 2 o 7 / Al 2 o 3 Catalyst samples.
Embodiment 3～7
[0028] The content of making rhenium respectively by the method for embodiment 2 is 10%, 12%, 14%, 16%, 20% Re 2 o 7 / Al 2 o 3 catalyst samples.
[0029] It is 60 centimeters in length, and the inner diameter is 1.8 centimeters of reactor bottoms to add volume and be 80 cubic centimeters, particle size is 10~20 order glass ball fillers; 2 grams of Re 2 o 7 / Al 2 o 3 The catalyst is added to the reactor, and 30 cubic centimeters of glass ball fillers with a particle size of 10 to 20 meshes are added to the top of the catalyst. The temperature of the reactor was raised to 550° C. under the condition of feeding 10 liters of nitrogen per hour, and kept at this temperature for 2 hours, and then dropped to a reaction temperature of 40° C.
[0030] The reactor stops feeding nitrogen, and feeds 99.5% 1-butene raw material from the upper end of the reactor, the raw material flow rate is 10 ml / hour, and the reaction system pressure is controlled at 3MPa by the regulating valve at...
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Abstract
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