Method of separating fischer-tropsch synthesis heavy distillate from ferrous iron-base catalyst

An iron-based catalyst and Fischer-Tropsch synthesis technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of adsorption catalyst recovery, difficult utilization, complex equipment, etc., and achieve long-term stable operation and reduce load , Improve the effect of filtration efficiency

Inactive Publication Date: 2008-07-30
CHNA ENERGY INVESTMENT CORP LTD +2
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Problems solved by technology

Although this method can reduce the operating load of the filter unit to a certain extent, the equipment is relatively complicated, and there are

Method used

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  • Method of separating fischer-tropsch synthesis heavy distillate from ferrous iron-base catalyst

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0022] Example 1

[0023] The processing capacity of the Fischer-Tropsch synthesis device is 240,000 tons / year, and the iron-based catalyst used can be the Fischer-Tropsch synthesis catalyst produced by patents US5324335, US454671 or CN1233463C, and the main active component of the catalyst is Fe-Cu-K.

[0024]The method of the invention is used to separate the heavy fraction of the Fischer-Tropsch synthesis product and the iron-based catalyst. The slurry formed by the catalyst and the Fischer-Tropsch synthesis product is drawn out from the slurry bed reactor, the concentration of the catalyst in the slurry is 30w%, and the gas content of the slurry is 15%. The weight flow rate of the slurry withdrawn from the slurry bed reactor was 150 tons / hour, and the residence time of the slurry in the off-vehicle settling tank was 20 minutes. The slurry is subjected to the action of a magnetic field with a downward magnetic field line in the sedimentation tank, and the magnetic field st...

Example Embodiment

[0025] Example 2

[0026] The equipment and main test steps are basically the same as those in Example 1. The slurry formed by the catalyst and the Fischer-Tropsch synthesis product is drawn from the slurry bed reactor. The concentration of the catalyst in the slurry is 30w%, the gas content of the slurry is 15%, and the extraction volume of the slurry is 150 tons / hour. The residence time in the sedimentation tank is 8 minutes, the strength of the applied magnetic field is 2000 Gauss, the concentration of the catalyst contained in the Fischer-Tropsch synthesis product at the location of the filter is less than 1w%, and the filtration precision of the filter is 5 microns. The weight flow rate of the Fischer-Tropsch synthesis product discharged through the filter is 30 tons / hour, the content of catalyst particles and powder in the effluent Fischer-Tropsch synthesis product is less than 100 ppm, and the stable operation time of the device is more than 5000 hours.

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Abstract

The invention relates to a preparation method for a heavy fraction and iron-based catalyst from fischer tropsch slurry phase, including the following steps: mixing slurry of fischer-tropsch synthesis products heavy fraction and iron-based catalyst from slurry reactor is sent into a deposition tank outside the slurry reactor, so as to facilitate the mixing slurry in deposition tank to realize fast separation for fischer-tropsch synthesis heavy distillates and iron-based catalyst under the function of magnetic field along the direction of magnetic force lines downwards. The separated fischer-tropsch synthesis heavy distillates can be discharged as product through a filter arranged on the top of the deposition tank. The method of the invention can realize fast separation of heavy distillates and iron-based catalyst of fischer-tropsch synthesis products; meanwhile, move than 99.95 percent of catalyst particles can be left in the reaction system to continuously function as catalyst.

Description

technical field [0001] The invention relates to a method for separating a slurry bed Fischer-Tropsch synthesis catalyst from a heavy fraction of a Fischer-Tropsch synthesis product, more specifically, a method for separating a slurry bed Fischer-Tropsch synthesis product heavy fraction from an iron-based catalyst. Background technique [0002] In order to overcome the problems of easy occurrence of hot spots in the fixed-bed reactor Fischer-Tropsch synthesis catalyst bed and difficulty in catalyst loading and unloading, people have vigorously developed slurry-bed reactor Fischer-Tropsch synthesis technology in recent years. The slurry bed reactor has many advantages, for example, rapid heat extraction and basically constant temperature reaction; the reactor has a simple structure and low cost; the processing capacity is large; the catalyst can be continuously replenished and unloaded, and the method is simple and so on. However, the catalyst is required to be fine particles ...

Claims

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Application Information

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IPC IPC(8): B01J8/22B01D36/00B01D21/28B03C1/02
Inventor 门卓武石玉林卜亿峰吕毅军胡樟能宁文生李小年
Owner CHNA ENERGY INVESTMENT CORP LTD
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