Preparation method of coated type composite iron phosphide

An iron phosphide and coated technology, which is applied in the direction of chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of complex and cumbersome steps, strict equipment, high cost, etc., and achieve uniform particle size distribution, The effect of simple process and low cost

Active Publication Date: 2019-05-28
鲍君杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current methods all have high cost, strict equipment, complicated and cumbersome steps, dangerous or expensive reaction raw materials, polluting by-products, etc.

Method used

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  • Preparation method of coated type composite iron phosphide
  • Preparation method of coated type composite iron phosphide
  • Preparation method of coated type composite iron phosphide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of coated composite ferric phosphide, characterized in that it comprises the following steps:

[0038] (1) Add iron oxide red to citric acid and polyethylene glycol. After mixing, add pure water and add water to stir for slurry, then add phosphoric acid and cobalt acetate, stir to dissolve, and then use a jar mill to grind to a particle size of 0.7 μm ;

[0039] (2) Spray-dry the finely ground slurry in a spray dryer until the moisture content of the dried material is lower than 1%;

[0040] (3) Put the dry material into the rotary furnace, feed nitrogen gas at the same time, react at a temperature of 880°C for 4.2 hours, then cool to a temperature lower than 120°C, and then undergo airflow crushing, then classify in the classification chamber, after classification The material is screened to obtain coated composite iron phosphide.

[0041] In the step (1), the grinding balls in the pot mill are zirconia, alumina or stainless steel balls with a di...

Embodiment 2

[0053] A preparation method of coated composite ferric phosphide, characterized in that it comprises the following steps:

[0054] (1) Add iron oxide red to citric acid and polyethylene glycol. After mixing, add pure water and add water to stir for slurry, then add phosphoric acid and cobalt acetate, stir to dissolve, and then use a jar mill to grind to a particle size of 0.65 μm ;

[0055] (2) Spray-dry the finely ground slurry in a spray dryer until the moisture content of the dried material is lower than 1%;

[0056] (3) Put the dry material into the rotary furnace, feed nitrogen gas at the same time, react at a temperature of 865°C for 4.5 hours, then cool to a temperature lower than 120°C, and then undergo airflow crushing, then classify in the classification chamber, after classification The material is screened to obtain coated composite iron phosphide.

[0057] In the step (1), the grinding balls in the pot mill are zirconia, alumina or stainless steel balls with a d...

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Abstract

The invention discloses a preparation method of coated type composite iron phosphide. The preparation method of the coated type composite iron phosphide comprises the steps that citric acid and polyethylene glycol are added into iron oxide red, after mixing, pure water is added for stirring and slurrying, then, phosphoric acid and cobalt acetate are added, stirring is carried out for dissolution,and then, levigating is carried out to the grain size of 0.5-0.8 [mu]m by using a pot mill; spray drying is carried out on levigated slurry in a spray drying machine, and drying is carried out to themoisture content of a drying material lower than 1%; and the drying material is placed into a rotary furnace, meanwhile, nitrogen is pumped, reaction is carried out for 3-5h at the temperature of 850-900 DEG C, then, cooling is carried out to the temperature of lower than 120 DEG C, after air flow smashing, classification is carried out in a classification cavity, and the coated type composite iron phosphide is obtained after the classified materials are subjected to screening. The preparation method of the coated type composite iron phosphide is simple in technology and low in cost, and the obtained coated type composite iron phosphide has uniform grain distribution and high activity.

Description

technical field [0001] The invention relates to a method for preparing coated composite iron phosphide, which belongs to the field of waste recycling. Background technique [0002] Petroleum is processed to obtain abundant petroleum products, such as fuel, solvent, chemical raw material, etc., which are applied to various industries in the national economy. Among them, hydrofining is a very important process in reducing the sulfur content of heavy oil catalytic cracking gasoline. In order to realize clean oil production, it has become a research hotspot to develop and develop high-performance hydrodesulfurization catalysts. In addition to transition metal carbides and nitrides with excellent catalytic properties, transition metal phosphides are also considered to have the same properties. [0003] In previous studies, the effective methods to solve the heavy and inferior quality of petroleum are mainly hydrodesulfurization (HDS) and hydrodenitrogenation (HDN). However, th...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/10
Inventor 鲍君杰
Owner 鲍君杰
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