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

A technology of cobalt-based catalyst and Fischer-Tropsch synthesis, which is applied in the fields of liquid hydrocarbon mixture recovery, liquid solution solvent extraction, refined hydrocarbon oil, etc., can solve the problems of separation and recovery methods without literature reports, etc., achieve good economic benefits, reduce environmental pollution, The effect of short process flow

Inactive Publication Date: 2005-01-12
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to literature research, there is no literature report on the separation and recovery of industrial slurry bed Fischer-Tropsch synthesis spent catalysts and heavy hydrocarbons.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Take the unloaded waste Co / SiO 2 The mixture of catalyst and heavy hydrocarbon, solid content analysis result: spent catalyst 20.0%, heavy hydrocarbon 80.0%.

[0038] 2. Put 100 kg of waste Co / SiO 2 Put the mixture of catalyst and heavy hydrocarbon into the reaction kettle with heating, stirring and reflux device, then add 200 kg of light liquid paraffin with an initial boiling point of 210°C as solvent, turn on the stirring when it is heated to 80°C, and then continue Heating to 140°C and stirring at this temperature for 100 minutes to make heavy hydrocarbons and light liquid paraffin with an initial boiling point of 210°C fully miscible.

[0039] 3. Settling at 120° C. for 60 minutes, solid-liquid separation, and 225 kg of mixed liquid of light liquid paraffin and heavy hydrocarbons in the upper layer.

[0040] 4. Add 80 kg of light liquid paraffin with an initial boiling point of 210° C. to the reactor again, heat to 140° C., and stir for 60 minutes.

[0041] 5...

Embodiment 2

[0055] 1. Take the spent Co / ZrO unloaded from the slurry bed 2 / SiO 2 Catalyst, solid content analysis results: spent catalyst 29.8%, heavy hydrocarbon 71.2%.

[0056] 2. Dilute 150 kg of waste Co / ZrO 2 / SiO 2 Put the mixture of catalyst and heavy hydrocarbon into the reaction kettle with heating, stirring and reflux device, then add 600 kg of light liquid paraffin with an initial boiling point of 210°C as solvent, turn on the stirring when it is heated to 90°C, and then continue Heating to 120°C and stirring at this temperature for 75 minutes to make heavy hydrocarbons fully miscible with light liquid paraffin with an initial boiling point of 210°C.

[0057] 3. At 110° C., leave it to settle for 90 minutes, separate solid and liquid, and discharge 645 kilograms of mixed liquid of light liquid paraffin and heavy hydrocarbons in the upper layer.

[0058] 4. Add 120 kg of light liquid paraffin with an initial boiling point of 210° C. in the reactor again, heat to 120° C., an...

Embodiment 3

[0073] 1. Take the spent Co / Al unloaded from the slurry bed 2 o 3 Catalyst, solid content analysis results: spent catalyst 19.6%, heavy hydrocarbon 80.4%.

[0074] 2. Put 180 kg of waste Co / Al 2 o 3 Add the mixture of catalyst and heavy hydrocarbon into the reaction kettle with heating, stirring and reflux device, then add 540 kg of light liquid paraffin with an initial boiling point of 210°C as solvent, turn on the stirring when it is heated to 70°C, and then continue Heating to 170°C and stirring at this temperature for 120 minutes to make heavy hydrocarbons and light liquid paraffin with an initial boiling point of 210°C fully miscible.

[0075] 3. Stand still and settle at 100° C. for 30 minutes, separate solid and liquid, and discharge 580 kilograms of mixed liquid of light liquid paraffin and heavy hydrocarbon in the upper layer.

[0076] 4. Add 100 kg of light liquid paraffin with an initial boiling point of 210° C. in the reactor again, heat to 170° C., and stir fo...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04C10G5/00C10G7/08C10G21/14
Inventor 相宏伟郝庆兰白亮李永旺
Owner SYNFUELS CHINA TECH CO LTD
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