A method for separating and recovering titanium dioxide from waste scr denitrification catalyst
A technology of denitrification catalyst and titanium dioxide, which is applied in the field of environmental protection technology and circular economy, can solve the problems of increasing enterprise costs, waste of effective resources, large land resources, etc., and achieve the effects of saving resources, reducing consumption, and high social and economic benefits
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0043] 1) Pretreatment: Take a certain amount of waste SCR denitrification catalyst, dedust, crush, grind, pass through a 100-mesh sieve, and the under-sieve is the catalyst powder. The sieved material is mixed with the crushed waste SCR destocking catalyst and re-sieved.
[0044] 2) Four-stage cross-flow impregnation:
[0045] 21) 10 g of the catalyst powder obtained in step 1) was impregnated with 50 ml of 10% sodium hydroxide solution, in an oil bath at 150° C. for 2 h, and solid-liquid separation was performed after immersion to obtain a filtrate (filtrate a) and a filter cake (filter cake a);
[0046] 22) The filter cake (filter cake a) in step 21) was impregnated with 50 ml of 10% sodium hydroxide solution, oil bathed at 150° C. for 2 hours, and solid-liquid separation was obtained after immersion to obtain filtrate (filtrate b) and filter cake (filter cake b);
[0047] 23) The filter cake (filter cake b) in step 22) is impregnated with 50 ml of 10% sodium hydroxide so...
Embodiment 2
[0052] 1) Pretreatment: Take a certain amount of waste SCR denitrification catalyst, dedust, crush, grind, pass through a 100-mesh sieve, and the under-sieve is the catalyst powder. The sieved material is mixed with the crushed waste SCR destocking catalyst and re-sieved.
[0053] 2) Four-stage cross-flow impregnation:
[0054] 21) 10 g of the catalyst powder obtained in step 1) was impregnated with 20 ml of 40% potassium hydroxide solution, in an oil bath at 100° C. for 4 h, and solid-liquid separation was obtained after immersion to obtain a filtrate (filtrate a) and a filter cake (filter cake a);
[0055] 22) The filter cake (filter cake a) in step 21) is impregnated with 20ml of 40% potassium hydroxide solution, oil bathed at 100°C for 4h, and solid-liquid separation is obtained after immersion to obtain filtrate (filtrate b) and filter cake (filter cake b);
[0056] 23) The filter cake (filter cake b) in step 22) was impregnated with 20 ml of 40% potassium hydroxide sol...
Embodiment 3
[0061] 1) Pretreatment: Take a certain amount of waste SCR denitrification catalyst, dedust, crush, grind, pass through a 100-mesh sieve, and the under-sieve is the catalyst powder. The sieved material is mixed with the crushed waste SCR destocking catalyst and re-sieved.
[0062] 2) Four-stage cross-flow impregnation:
[0063] 21) 10 g of the catalyst powder obtained in step 1) was impregnated with 35 ml of 25% potassium hydroxide solution, in an oil bath at 125° C. for 3 h, and separated from solid and liquid after impregnation to obtain filtrate (filtrate a) and filter cake (filter cake a);
[0064] 22) The filter cake (filter cake a) in step 21) was impregnated with 35 ml of 25% potassium hydroxide solution, oil bathed at 125° C. for 3 hours, and separated from solid and liquid after immersion to obtain filtrate (filtrate b) and filter cake (filter cake b);
[0065] 23) The filter cake (filter cake b) in step 22) was impregnated with 35 ml of 25% potassium hydroxide solu...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More