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Regenerated impregnation liquid and production method thereof as well as method for enhancing mechanical strength of waste catalyst by using regenerated impregnation liquid

A waste catalyst, mechanical strength technology, applied in chemical instruments and methods, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve the problems of reduced mechanical strength of catalysts, reduced service life of regenerated catalysts, etc., to improve adhesion Strength and abrasion strength, increased bonding, easy to achieve results

Inactive Publication Date: 2016-05-25
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength of the catalyst after cleaning will be greatly reduced, reducing the service life of the regenerated catalyst

Method used

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  • Regenerated impregnation liquid and production method thereof as well as method for enhancing mechanical strength of waste catalyst by using regenerated impregnation liquid
  • Regenerated impregnation liquid and production method thereof as well as method for enhancing mechanical strength of waste catalyst by using regenerated impregnation liquid
  • Regenerated impregnation liquid and production method thereof as well as method for enhancing mechanical strength of waste catalyst by using regenerated impregnation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation method of regenerated dipping liquid

[0025] The first step: Mix 900g of absolute ethanol with 100g of glacial acetic acid, adjust PH=2 with acid, stir with a magnetic stirrer for 30 minutes, add 500g of tetrabutyl titanate and 100g of deionized water, continue to stir for 1h to form TiO 2 Sol.

[0026] The second step: Weigh 5 g of ammonium metavanadate and 6 g of monoethanolamine, add ammonium metavanadate to the monoethanolamine solution, dissolve at 80°C and stir evenly to form solution A. Weigh 10 g of ammonium heptamolybdate, 1 g of hydroxymethyl cellulose, and 1 g of polyethylene oxide, dissolve in 50 g of deionized water and stir evenly to form solution B.

[0027] Step 3: Pour the solution A and solution B prepared in the second step into the TiO prepared in the first step 2 In the sol, stir with a magnetic stirrer for 30 minutes to make it evenly mixed.

Embodiment 2

[0028] Example 2: Preparation method of regenerated dipping liquid

[0029] The first step: Weigh 500g isopropyl titanate, 1000g absolute ethanol, 150g glacial acetic acid, stir with a magnetic stirrer for 1h to make it evenly mixed and form TiO 2 Sol.

[0030] Step 2: Weigh 7g of ammonium metavanadate and 6.5g of monoethanolamine, add ammonium metavanadate to the monoethanolamine solution, dissolve at 80°C and stir evenly to form solution A. Weigh 10.5 g of ammonium heptamolybdate, 1 g of hydroxymethyl cellulose, and 1 g of polyethylene oxide, dissolve in 50 g of deionized water and stir evenly to form solution B.

[0031] Step 3: Pour the solution A and solution B prepared in the second step into the TiO prepared in the first step 2 In the sol, stir with a magnetic stirrer for 30 minutes to make it evenly mixed.

Embodiment 3

[0032] Example 3: Preparation method of regenerated dipping liquid

[0033] Step 1: Weigh 400g of tetrabutyl titanate, 50g of ethyl orthosilicate, 1000g of absolute ethanol, 100g of glacial acetic acid, stir with a magnetic stirrer for 1h to make it evenly mixed to form TiO 2 And SiO 2 Composite sol.

[0034] The second step: Weigh 8g of ammonium metavanadate and 5.6g of monoethanolamine, add ammonium metavanadate to the monoethanolamine solution, dissolve at 80°C and stir evenly to form solution A. Weigh 8.8 g of ammonium heptamolybdate, 2 g of hydroxymethyl cellulose, and 2 g of polyethylene oxide, dissolve in 80 g of deionized water and stir evenly to form solution B.

[0035] Step 3: Pour the solution A and solution B prepared in the second step into the TiO prepared in the first step 2 In the sol, stir with a magnetic stirrer for 30 minutes to make it evenly mixed.

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Abstract

The invention discloses regenerated impregnation liquid and a production method thereof as well as a method for enhancing the mechanical strength of a waste catalyst by using the regenerated impregnation liquid. The regenerated impregnation liquid is prepared from the following components in parts by weight: 1-2 parts of ammonium metavanadate, 1.2-1.4 parts of monoethanolamine, 2-2.2 parts of ammonium heptamolybdate, 200-300 parts of absolute ethyl alcohol, 20-40 parts of glacial acetic acid, 20-40 parts of de-ionized water, and 100-120 parts of titanate or silicate or 100-120 parts of titanate and 5-15 parts of silicate. The regenerated impregnation liquid disclosed by the invention can form gel on the surface of the waste catalyst and has the advantages that supplemented active substances can be effectively supported, the combining property of the active substances and a catalyst matrix is enhanced, and the adhesion strength and the abrasion strength of the catalyst are improved; and meanwhile, the production method of the regenerated impregnation liquid and the method for enhancing the mechanical strength of the waste catalyst are simple and feasible and are easy to realize.

Description

Technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a regeneration impregnating solution and a preparation method thereof and a method for enhancing the mechanical strength of a waste catalyst by using the regeneration impregnation solution. Background technique [0002] The world's largest coal consuming country, its thermal power consumption accounts for more than half. The flue gas nitrogen oxides (NOx) emitted from coal combustion are an important cause of regional pollution such as atmospheric haze, photochemical smog, and acid rain, which seriously affect human health and social stability. Effective control of flue gas NOx emissions is extremely important for reducing total NOx emissions and improving the regional atmospheric environment. [0003] The SCR method is the most mainstream method for removing NOx in the world. SCR is the use of appropriate catalysts, at a certain temperature, the use of reducing agents (such as NH...

Claims

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Application Information

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IPC IPC(8): B01J38/48B01J38/02B01J38/04B01J38/60B01J38/64B01J23/28
CPCB01J38/485B01J23/28B01J38/02B01J38/04B01J38/60B01J38/64
Inventor 董晓真王虎李倩
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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