Process for producing nano titanium dioxide/diatomite composite photocatalytic material
A technology of nano-titanium dioxide and composite photocatalysis, which is applied in the direction of physical/chemical process catalysts, chemical/physical processes, catalyst activation/preparation, etc., can solve the problems of unsatisfactory advanced treatment of exhaust gas and the inability to completely remove harmful substances, etc., and achieve improvement Photocatalytic performance, ideal effect, and the effect of simplifying the preparation process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0024] Example 1
[0025] Purification of refined diatomaceous earth from raw ore includes the following steps:
[0026] Dry the diatomite ore to a moisture content of 0-2%, and use an airflow turbine separator to sort and remove sand to remove grit and impurities with a particle size> 43μm, and then calcinate with a rotary kiln to remove organic matter. The calcining temperature is 500 ℃, heat preservation calcination time 90min
[0027] Wet acid leaching: Put 1680kg of sulfuric acid with a concentration of 72% and 420kg of diatomaceous earth after the above sorting into the reactor, and use sulfuric acid for wet chemical purification to further remove the acid-soluble impurities in the diatom shell and dredge the diatom The pores of the body increase the specific surface area of the diatomaceous earth. When the temperature of the reactor reaches 100°C, the reaction is kept for 4 hours; after the reaction is kept for 4 hours, 1600L of water is injected, and the reaction is kept f...
Example Embodiment
[0041] Example 2
[0042] In the pulping step, mixing in parts by weight refined diatomaceous earth: a 36% concentration of hydrochloric acid solution: water = 308.2:30:6000;
[0043] In the hydrolysis and precipitation step, the hydrolysis is carried out at the ratio of weight parts of titanium tetrachloride with a concentration of 200g / L: ammonium sulfate with a concentration of 200g / L: ammonium carbonate with a concentration of 200g / L=339:308.2:308.2 Precipitation reaction
[0044] In the filtering and washing step, filtering and washing are performed in a ratio of parts by weight of refined diatomaceous earth: water = 308.2:13000;
[0045] In the drying step, the drying temperature is 300°C, and the drying is stopped when the water content reaches 0-6%;
[0046] In the calcination step, the calcination time is 6 hours, and the calcination temperature is 620°C;
[0047] The other steps are the same as in Example 1.
Example Embodiment
[0048] Example 3
[0049] In the said pulping step, after mixing in parts by weight refined diatomaceous earth: 36% hydrochloric acid solution: water = 260:12:5000, stirring for 7 minutes;
[0050] In the hydrolysis and precipitation step, the hydrolysis is carried out at the ratio of weight parts of titanium tetrachloride with a concentration of 200g / L: ammonium sulfate with a concentration of 200g / L: ammonium carbonate with a concentration of 200g / L=280:240:240 Precipitation reaction
[0051] In the filtering and washing step, filtering and washing are performed according to the ratio of parts by weight of refined diatomaceous earth: water = 260:10000;
[0052] In the drying step, the drying temperature is 280°C;
[0053] In the calcination step, the calcination time is 3 hours, and the calcination temperature is 700°C;
[0054] The other steps are the same as in Example 1.
PUM
Property | Measurement | Unit |
---|---|---|
Particle size | aaaaa | aaaaa |
Specific surface area | aaaaa | aaaaa |
Granularity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap