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Method for preparing catalyst from thermochemically treated wax-containing filter residues in Fischer-Tropsch synthesis and application of catalyst

A technology of thermochemical treatment and Fischer-Tropsch synthesis, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. To achieve the effect of low cost, high added value of output and strong universality

Active Publication Date: 2021-05-28
NJTECH ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing patent publication number is the invention patent of CN111229254A, which discloses a method for treating organic waste water with waste catalysts of Fischer-Tropsch synthesis. The technological process adopted is solvent washing→surface treatment→low temperature baking→magnetic separation (only iron catalyst ), the surface treatment effect of the catalyst prepared by this method is not good, and the final catalyst performance is poor

Method used

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  • Method for preparing catalyst from thermochemically treated wax-containing filter residues in Fischer-Tropsch synthesis and application of catalyst
  • Method for preparing catalyst from thermochemically treated wax-containing filter residues in Fischer-Tropsch synthesis and application of catalyst
  • Method for preparing catalyst from thermochemically treated wax-containing filter residues in Fischer-Tropsch synthesis and application of catalyst

Examples

Experimental program
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Effect test

preparation example 1

[0034] Use a hammer crusher to crush the F-T synthetic waxy filter residue thermochemical treatment residue, use a blade grinder to grind to 100 mesh, and set aside; put the ground residue in a muffle furnace and roast at 600°C for 120 minutes, and cool it for use , to obtain the catalyst crude product; the cooled catalyst crude product was washed with methanol for 90min, the washing liquid-solid ratio was 5, the stirring rate was 50rpm, the washing time was 30min, and after washing, it was dried at 150°C for 60min; the dried crude product was used The 3mol / L hydrochloric acid solution was acid-washed for 30 minutes according to the washing liquid-solid ratio of 1, and then rinsed with deionized water until the pH was neutral; the product obtained after washing was dried at 120°C for 60 minutes to obtain a powder catalyst. This preparation example catalyst performance and water treatment index are as table 1:

[0035] Table 1

[0036]

preparation example 2

[0038] Use a jaw crusher to crush the F-T synthetic waxy filter residue thermochemical treatment residue, use a roller mill to grind to 8 mesh, and set aside; put the ground residue in a muffle furnace and roast at 900°C for 30 minutes, and cool it for use , to obtain the catalyst crude product; the cooled catalyst crude product is washed with methanol ethanol (1:1), the washing liquid-solid ratio is 1, the stirring rate is 300rpm, the washing time is 90min, and after washing, it is dried at 105°C for 120min; The dried crude product was acid-washed with 0.5 mol / L sulfuric acid solution at a washing liquid-solid ratio of 5 for 90 minutes, and then rinsed with deionized water until the pH was neutral; the product obtained after washing was dried at 105°C for 120 minutes, A powdered catalyst is obtained. This preparation example catalyst performance and water treatment index are as shown in table 2 below:

[0039] Table 2

[0040]

preparation example 3

[0042] Use a jaw crusher to crush the F-T synthetic waxy filter residue thermochemical treatment residue, use a blade grinder to grind to 60 mesh, and set aside; put the ground residue in a muffle furnace and roast at 800°C for 60 minutes, and cool it for use , to obtain the catalyst crude product; the cooled catalyst crude product is washed with acetone, the washing liquid-solid ratio is 3, the stirring rate is 150rpm, the washing time is 60min, and after washing, it is dried at 110°C for 90min; the dried crude product is used 2mol / L sulfuric acid solution with a washing liquid-solid ratio of 3 for pickling treatment for 60 minutes, after washing, rinse with deionized water until the pH is neutral; dry the product obtained after washing at 120°C for 90 minutes to obtain a powder catalyst. This preparation example catalyst performance and water treatment index are as follows table 3:

[0043] table 3

[0044]

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Abstract

The invention belongs to the field of solid waste resource utilization, and particularly relates to a method for preparing a catalyst by using residues obtained after thermal chemical treatment of wax-containing filter residues in Fischer-Tropsch synthesis and application of the catalyst; wherein the preparation method comprises the following steps: (1) crushing and grinding the thermal chemical treatment residues of the Fischer-Tropsch synthesis wax-containing filter residues; (2) roasting the crushed residues in the step (1) at high temperature, and cooling the product to obtain a catalyst crude product; (3) washing the crude product of the catalyst obtained in the step (2) by using an organic solvent, and drying the crude product. (4) carrying out acid pickling treatment on the catalyst crude product obtained after washing and drying in the step (3), and adjusting the pH value of the catalyst crude product to 6.5-7.5; and (5) drying the product obtained in the step (4) to obtain the catalyst for water treatment. The preparation method is suitable for almost all wax residues after thermochemical treatment, the technological operation is simple, the cost is low, and the prepared catalyst is high in reaction efficiency, suitable for various oxidation systems for various wastewater treatment and high in universality.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and in particular relates to a method for preparing a catalyst by using a waxy filter residue in Fischer-Tropsch synthesis after thermochemical treatment and its application. Background technique [0002] Fischer-Tropsch synthesis (F-T synthesis) is the main reaction process of indirect coal liquefaction, in which coal gasification synthesis gas is produced under the action of a catalyst to produce oil products mainly composed of saturated linear hydrocarbons and waxes, and then through further processing to produce chemicals and gasoline, diesel Waiting for fuel. Fischer-Tropsch synthesis uses different types of catalysts, mainly consisting of cobalt-based, iron-based, manganese-based and nickel-based catalysts. Fischer-Tropsch wax filtration units produce a waxy filter residue, which contains wax, catalyst and minerals. When the filter residue is discharged from the filter u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/10C02F1/72
CPCB01J23/8892C02F1/725B01J35/613
Inventor 徐炎华徐学骁
Owner NJTECH ENVIRONMENT TECH CO LTD
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