A method for activating and whitening silicate clay minerals
A silicate clay and mineral technology, applied in silicate, aluminum silicate and other directions, can solve the problems of affecting the color and luster of silicate clay, limiting the scope of application, etc., achieving low cost, improving adsorption performance, and increasing pore volume and pore size Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0020] 1. Mix attapulgite with a whiteness of 52 and 2mol / L hydrochloric acid solution to make a slurry, in which the mass ratio of silicate clay to acid solution is 1:50, soak for 2 days, and place at -20°C Freeze for 4 days.
[0021] 2. Transfer the slurry prepared in the above steps to a hydrothermal reaction kettle, place it in an oven, raise the temperature to 250° C., and keep it warm for 20 hours after reaching the reaction temperature. After the reaction, the slurry was centrifuged, washed and filtered until neutral and free of chloride ions (1% silver nitrate test), and the resulting filter cake was dried and ground to obtain the product with a whiteness of 93.1.
Embodiment 2
[0023] 1. Mix attapulgite with a whiteness of 52 and 8mol / L (H + Concentration) sulfuric acid solution was mixed uniformly to make a slurry, in which the mass ratio of silicate clay to acid solution was 1:10, soaked for 1 day, and placed in a freezer at 0°C for 2 days.
[0024] 2. Transfer the slurry prepared in the above steps to a hydrothermal reaction kettle, place it in an oven, raise the temperature to 140° C., and keep it warm for 3 hours after reaching the reaction temperature. After the reaction, the slurry was centrifuged, washed and filtered until it was neutral and free of chloride ions (1% silver nitrate test), and the resulting filter cake was dried and ground to obtain the product with a whiteness of 90.1.
Embodiment 3
[0026] 1. Mix attapulgite with a whiteness of 52 and 5mol / L (H + Concentration) sulfuric acid solution was mixed evenly to make a slurry, in which the mass ratio of silicate clay to acid solution was 1:30, soaked for 2 days, and frozen at -10°C for 3 days.
[0027] 2. Transfer the slurry prepared in the above steps to a hydrothermal reaction kettle, place it in an oven, raise the temperature to 180° C., and keep it warm for 12 hours after reaching the reaction temperature. After the reaction is over, the slurry is centrifuged, washed and filtered to be neutral and free of chloride ions (1% silver nitrate test), and the resulting filter cake is dried and ground to obtain the product (transmission electron microscope pictures are as attached figure 2 Shown), the whiteness is 92.2.
PUM
| Property | Measurement | Unit |
|---|---|---|
| whiteness | aaaaa | aaaaa |
| whiteness | aaaaa | aaaaa |
| whiteness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More