A method for preparing pigments using waste flue gas denitrification catalyst

A denitration catalyst and catalyst technology, which are applied in chemical instruments and methods, inorganic chemistry, antimony compounds, etc., can solve the problems of limited oxide purity, product added value, and recycling economy restrictions, and achieve simple and harmless methods. Processing and resource utilization, the effect of uncomplicated structure

Active Publication Date: 2016-06-01
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of this application is to recover the oxides in the catalyst, but the purity of the obtained oxides is limited, so the added value of the product and the economics of recovery are limited
The method of using waste denitrification catalysts to prepare pigments has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 A method for preparing a pigment by using a waste flue gas denitrification catalyst, comprising the following steps:

[0029] Use a jaw crusher to crush the honeycomb waste denitration catalyst into 30mm catalyst coarse particles; add 5% (weight percent) antimony pentoxide and 5% (weight percent) to 90% (weight percent) catalyst coarse particles Nickel oxide, mixed uniformly; use a ball mill to grind the uniformly mixed raw materials into powder particles below 200 mesh (particle size 74μm); put the powder particles into a drum-type industrial roasting furnace, and heat up at a rate of 20°C / min Stop heating after the temperature rises to 800°C, and the powder particles undergo a combustion reaction at this temperature until the temperature in the roaster reaches 980°C and no longer rises; continue heating until the temperature in the roaster reaches 1000°C, keep it for 12 hours, and cool naturally to obtain a yellow solid Granules: Grind the obtained yellow ...

Embodiment 2

[0033] Example 2 A method for preparing a pigment by using a waste flue gas denitrification catalyst, comprising the following steps:

[0034] The waste denitrification catalyst (flat-plate type) was peeled off the metal mesh and crushed to obtain catalyst coarse particles of about 5mm; 18% (weight percent) of antimony trioxide and 2% ( % by weight) nickel nitrate of nickel oxide, mixed uniformly; use a ball mill to grind the uniformly mixed raw materials into powder particles below 200 mesh (particle size 74 μm); put the powder particles into a drum-type industrial roaster to The heating rate is 10°C / min. After the temperature rises to 800°C, stop heating. At this temperature, the powder particles undergo a combustion reaction until the temperature in the roaster reaches 940°C and no longer rises; continue heating until the temperature in the roaster reaches 1000°C, and keep it for 16 hours. , natural cooling to obtain yellow solid particles; the obtained yellow solid parti...

Embodiment 3

[0038] Example 3 A method for preparing a pigment by using a waste flue gas denitrification catalyst, comprising the following steps:

[0039] Use a jaw crusher to crush the honeycomb waste denitrification catalyst into coarse catalyst particles of about 20mm; add 10% (weight percent) of antimony pentoxide and 5% (weight percent) of catalyst coarse particles to 85% (weight percent) ) of manganese oxide, mixed uniformly; use a ball mill to grind the uniformly mixed raw materials into powder particles below 200 mesh (particle size 74 μm); Stop heating after the heating rate rises to 800°C, and the powder particles undergo a combustion reaction at this temperature until the temperature in the roaster reaches 900°C and no longer rises; continue heating until the temperature in the roaster reaches 1000°C, keep it for 10 hours, and cool naturally to obtain Brown solid particles; grind the obtained brown solid particles with a Raymond mill to a particle size of less than 1.5 μm to ...

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Abstract

The invention relates to a method for preparing a pigment by using a waste flue gas denitrification catalyst. The steps are as follows: crush the waste denitrification catalyst with a crusher, add a metal oxide stabilizer and a metal oxide color developer and mix evenly; use a ball mill to mix evenly The final raw materials are ground into powder particles and put into industrial roasting furnaces. After heating up to 800°C at a certain heating rate, a combustion reaction occurs. They are kept at 1000°C in the roasting furnace for 8-16 hours, naturally cooled and ground to obtain pigments. . The pigment of the invention is stable in property, and has good heat resistance, light resistance, weather resistance, acid resistance and alkali resistance. The method of the invention is simple, requires less equipment and has an uncomplicated structure, can realize harmless treatment and resource utilization of waste denitrification catalysts, and is convenient for popularization.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and in particular relates to a method for preparing pigments by using a waste flue gas denitrification catalyst. Background technique [0002] Titanium nickel yellow, titanium chrome yellow, titanium cobalt green, titanium manganese brown and other titanium series inorganic pigments are based on TiO 2 It is a mixed-phase pigment doped with metal ions as the main component. This kind of pigment has become an important inorganic pigment due to its excellent weather resistance, high heat resistance, safety, non-toxicity, harmlessness to the human body and the environment, and the ability to reflect infrared rays. color pigments. Since titanium-based inorganic pigments are harmless to human body and ecology, the development of titanium-based inorganic pigments market has maintained a high speed in the past few decades. [0003] At present, flue gas denitrification catalysts are basically based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047C01G53/00C01G30/00C01G45/02C01G51/04
Inventor 汪永威王强丁朋果孙勇张春雷周晓湘
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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