Method of separating and reclaiming spent cobalt based catalyst and heavy hydrocarbon throuth Fishcher-Tropsch synthesis in slurry bed

Abstract

A method for recovering cobalt-base catalyst and heavy hydrocarbon includes extracting and separating mixer of waste cobalt-base catalyst and heavy hydrocarbon with liquid paraffin having initial distillation point of 210 deg.C for three to four times, using dimethylbenzene to extract and separate for two to three times. The recovered mixer of liquid paraffin and heavy hydrocarbon can be used as reaction media in fluid bed reactor and the recovered waste cobalt-base catalyst can be directly used to recover valuable metal of cobalt.

Description

technical field

[0001] The present invention relates to a method for separating and recovering catalysts and heavy hydrocarbons, in particular to a method for separating and recovering spent cobalt-based catalysts and heavy hydrocarbons unloaded from reactors after the completion of industrial slurry bed Fischer-Tropsch synthesis reaction . Background technique

[0002] From syngas (CO+H 2 ) The process of generating hydrocarbons under the action of catalyst is called Fischer-Tropsch synthesis reaction. Iron-based and cobalt-based catalysts are currently the two most widely used industrial catalysts for Fischer-Tropsch synthesis. Iron-based catalysts are suitable for Fischer-Tropsch synthesis of coal-based syngas with low hydrogen-to-carbon ratio (molar ratio 0.5-1.2), and cobalt-based catalysts are suitable for Fischer-Tropsch synthesis of natural gas-based syngas (molar ratio 2).

[0003] Fischer-Tropsch synthesis can be carried out in reactors such as fixed bed, fluidi...