A kind of supported magnetic precipitation iron Fischer-Tropsch synthesis catalyst and preparation method thereof
A technology of Tropsch synthesis and catalyst, which is applied in the field of preparation of the loaded magnetic precipitation iron Fischer-Tropsch synthesis catalyst, can solve the problems of affecting the running time of the reactor, increasing the running cost, and the limited filtration capacity of the filter, so as to reduce the input of the product The effect of increasing the amount of olefins, improving the selectivity of olefins and improving the separation efficiency
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[0045] In the preparation method of the present invention, optional water-soluble copper salt, potassium salt and metal element M salt can be added in step 1), can also be added in step 3), can also be added in step 1) and step 3 ) are added. Preferably, the water-soluble copper salt copper is added in step 1), and the potassium salt is added in step 3). In addition, in the above-mentioned various addition methods, the total amount of addition of water-soluble copper salt, potassium salt and metal element M salt is within the above-mentioned range.
[0046] The optional range of the type of the water-soluble iron salt is relatively wide, for example, it can be an inorganic iron salt, specifically ferric chloride, ferric chloride hydrate, ferric sulfate, ferric sulfate hydrate, ferric nitrate and nitric acid One or more of iron hydrates, for the present invention, are preferably iron nitrate and / or iron nitrate hydrates, more preferably iron nitrate hydrates. Thus, the olefin...
Embodiment 1
[0106] 1) Preparation of Precipitated Iron Fischer-Tropsch Synthesis Catalyst Precursor
[0107] 5kg Fe(NO 3 ) 3 ·7H 2 O and 150g Cu(NO 3 ) 2 ·3H 2 O was respectively dissolved in deionized water, configured into a 5% by weight ferric nitrate solution and a 5% by weight copper nitrate solution, and the above two solutions were evenly mixed. Prepare 10% by weight sodium carbonate solution simultaneously, add above-mentioned solution in the stirred tank, temperature remains on 70 ℃, by regulating and controlling the amount of sodium carbonate solution, control pH value at 7, carry out co-precipitation reaction 1 hour, be warming up to then 85°C, aging for 3 hours. Filtrate, wash with deionized water repeatedly 4 times, until the conductivity of the filtrate is below 60 μS / cm, and obtain the precipitated iron Fischer-Tropsch synthesis catalyst precursor A1.
[0108] 2) Preparation of magnetic carrier precursor
[0109] At 25°C, weigh 300g of Fe with a particle size of 0.1...
Embodiment 2
[0117] 1) Preparation of Precipitated Iron Fischer-Tropsch Synthesis Catalyst Precursor
[0118] 5kg Fe(NO 3 ) 3 ·7H 2 O and 300g Cu(NO 3 ) 2 ·3H 2 O was respectively dissolved in deionized water, respectively configured into a 5% by weight ferric nitrate solution and a 5% by weight copper nitrate solution, and the above two solutions were evenly mixed. Then add 242g Zn(NO 3 ) 2 ·6H 2 O solid is fully stirred and dissolved, and a 10% by weight sodium carbonate solution is prepared at the same time, and the above solution is fed into the stirred tank, the temperature is maintained at 75 ° C, the pH value is controlled at 8, and the coprecipitation reaction is carried out for 0.5 hours, and then cooled to 60 °C, aged for 2 hours. Filtrate, wash with deionized water repeatedly 4 times, until the conductivity of the filtrate is below 60 μS / cm, and obtain the precipitated iron Fischer-Tropsch synthesis catalyst precursor A2.
[0119] 2) Preparation of magnetic carrier pre...
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