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Precipitated iron catalyst for Fischer-Tropsch synthesis reaction, and preparation method and application thereof

A Fischer-Tropsch synthesis and catalyst technology, which is used in catalyst activation/preparation, preparation of liquid hydrocarbon mixtures, chemical instruments and methods, etc., to achieve low selectivity, help reduction and carbonization, and improve dispersion.

Active Publication Date: 2010-11-17
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cobalt additive in the previous patent application is added by impregnation on the catalyst powder after calcination, so that repeated drying and calcination processes in the catalyst preparation process will bring unnecessary production costs

Method used

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  • Precipitated iron catalyst for Fischer-Tropsch synthesis reaction, and preparation method and application thereof

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preparation example Construction

[0041] One aspect of the present invention provides a kind of preparation method of the precipitated iron catalyst that is used for Fischer-Tropsch synthesis reaction, this method comprises the following steps: (a) make iron salt solution, assistant salt solution, precipitation agent solution and a small amount of silicon compound solution Co-current feeding in the precipitation reactor; (b) making the resulting mixture carry out co-precipitation reaction in the reactor under certain process conditions, and rapidly cooling, filtering and washing the slurry after the precipitation reaction is completed; (c) add a silicon compound binder to the washed filter cake, then add nitric acid to adjust the pH, and filter again; (d) use deionized water or deionized water and catalyst formulation requirements for the obtained filter cake performing repulping on the mixed solution of the salt solution; and (e) spray-drying and calcining the obtained catalyst slurry.

[0042] Another aspect...

Embodiment 1

[0080] Weigh 10Kg of Fe(NO 3 ) 3 9H 2 O, 0.18Kg of Cu(NO 3 ) 2 ·3H 2 O, add 32L of deionized water and stir to dissolve to obtain a mixed solution of iron salt. Weigh 7.0Kg of Na 2 CO 3 , Potassium silicate of 0.15Kg, add the deionized water of 20L and stir to dissolve, obtain the mixed solution of alkali and salt. Heat the above two mixed solutions to above 70°C by jacket heating, and then use two pumps to flow the two into the vigorously stirred reaction tank to produce co-precipitation, and adjust the speed of the two pumps to separate the reaction tank The precipitation temperature in the process was controlled at 80°C, the pH was 7.5, the stirring rate was 80rpm, and the reaction time was 43min. After the precipitation is completed, the precipitated slurry is quickly transferred to the water-cooled heat exchanger through the transfer pump, and the temperature of the slurry is lowered to below 50°C within about 40 minutes. Then perform vacuum filtration and wash r...

Embodiment 2

[0088] Prepare co-precipitation filter cake with the same method described in Example 1, add 3.7Kg mass concentration in filter cake and be the K of 20wt%. 2 SiO 3 Aqueous solution, high-shear stirring for about 0.5 hours to make it evenly mixed, add nitric acid at 50°C to adjust the pH value of the slurry, control the time of adding acid at 25 minutes, and filter when the pH value of the slurry is about 7 through testing . The obtained filter cake was reslurried with a certain amount of deionized water containing about 0.042 kg of neodymium nitrate (Nd(NO 3 ) 3), and continued to stir for 20 minutes to obtain catalyst slurry. The catalyst slurry was input into a pressure type spray dryer, and the spray drying was carried out under the condition that the inlet air temperature was 290° C. and the outlet air temperature was 105° C., and the spraying was completed after about 10 minutes. The obtained microspherical catalyst particles are heated to 150° C. at a heating rate of...

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Abstract

The invention relates to a precipitated iron catalyst for Fischer-Tropsch synthesis reaction, and a preparation method and application thereof. The preparation method comprises the following steps of: (a) feeding ferric salt solution, aid saline solution, the solution of precipitator and a small amount of solution of silicon compounds in a form of concurrent flow into a precipitation reactor; (b)performing coprecipitation reaction on the mixture under certain process conditions in the reactor, and fast cooling, filtering and rinsing pulp obtained after the precipitation reaction is finished;(c) adding a silicon compound binder into a filter cake obtained after the rinsing, adding a nitric acid into the filter cake to adjust pH and performing secondary filtration; (d) performing secondary pulping on the obtained filter cake with de-ionized water or the mixed solution of the de-ionized water and the required aid saline solution; and (e) performing spray-drying molding and baking on the obtained catalyst pulp. The catalyst prepared by the method of the invention has high specific surface area, proper pore volume, high wear strength, high sphericity and smooth surface.

Description

technical field [0001] The invention relates to a precipitated iron catalyst and a preparation method thereof, in particular to a catalyst for the formation of CO and H 2 A precipitated iron catalyst for preparing hydrocarbons (multiple hydrocarbons, a small amount of oxygen-containing compounds, etc.) through Fischer-Tropsch synthesis from mainly syngas and a preparation method thereof. In addition, the present invention also relates to the application of the catalyst prepared by the method of the present invention in the catalytic reaction for preparing hydrocarbons from synthesis gas, especially in the slurry bed Fischer-Tropsch synthesis oil production process. Background technique [0002] As we all know, Fischer-Tropsch synthesis is to convert CO and H 2 The catalytic reaction in which the main synthesis gas reacts on the catalyst to prepare hydrocarbons, and the main hydrocarbon products synthesized can be used as liquid vehicle fuel or chemical raw materials (M.E.Dr...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/83B01J37/03B01J35/10C10G2/00
Inventor 石玉林吕毅军王鹏常海谢晶程时富殷玉飞
Owner CHNA ENERGY INVESTMENT CORP LTD
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