Silica wetcake treatment method
A silicon dioxide, wet filtration technology, applied in the direction of silicon dioxide, silicon oxide, pharmaceutical formulations, etc., to achieve the effect of fast drying time, increased solid content, and low viscosity characteristics
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example 2
[0049] 165 (from J.M. Huber Co.) is supplied as a stock slurry. Next, the slurry was dewatered EIMCO at a pack pressure of 50 psig. The resulting product was not washed further, but dried with compressed air for 10 minutes.
[0050] From this standard wet cake, further samples were produced.
example 3
[0052] 63 liters of 13.3% 2.65MR sodium silicate were placed into the reactor and stirred at 40 rpm while being heated to 89°C with a recirculation rate of 30 Hz. At this point, simultaneous addition of sodium silicate (13.3%, 85° C.) and sulfuric acid (11.4%) was started, with silicate at 12.3 l / min and acid at 5.5 l / min. After the 8 minute addition time had elapsed, the stirrer was increased to 60 rpm and held there for an additional 47 minutes, after which the silicate addition was terminated. Acid flow was continued until a pH of approximately 7.0. At pH 7.0, the acid flow rate was reduced to 1.5 l / min and continued until the batch pH was adjusted to 6.2, at which point the acid flow was interrupted. Next, the batch pH was manually adjusted to 5.9 and the resulting batch was allowed to cook at this pH level of 93°C for 10 minutes. Next, the resulting batch is washed and filtered to 1.5% to 2% sulfate using an EIMCO filter press to form a filter cake, which is then, using...
example 1
[0058] The wet cake from Initial Example 1 was mixed thoroughly with sodium tetraborate (dry powder) for 5 minutes, targeting 0.5 wt% dry silica per weight. Subsequently, the resulting wet cake is dried to a target moisture content of between 3% and 7%. Next, the dried particles were ground to a particle size of 13.8 μm by a Raymond mill.
[0059] Invention example 2
[0060] The wet cake from Initial Example 1 was mixed thoroughly with sodium tetraborate (dry powder) for 5 minutes, targeting 1.0 wt% dry silica per weight. Subsequently, the resulting wet cake is dried to a target moisture content of between 3% and 7%. Next, the dried particles were ground to a particle size of 11.5 μm by a Raymond mill.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More