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

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 ...

AI Technical Summary

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 certain difficulties in the recovery and utilization of the catalyst adsorbed on the main pipeline wall of the external circulation of the slurry.

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