System and method for performing separation and dehydroxylation of fumed silica soot particles

Patent metadata

Field	Value
Publication number	US-12466737-B2
Application number	US-202418732805-A
Country	US
Kind code	B2
Filing date	Jun 4, 2024
Priority date	Aug 13, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The present disclosure provides a separator system for performing separation and dehydroxylation of fumed silica particles. The separator system includes a first inlet, a second inlet, a main body, a first outlet and a second outlet. The first inlet collects a primary feed of fumed silica particles from a gaseous stream into a double entry cyclone. The second inlet collects a secondary feed of chlorine gas into the double entry cyclone. The main body of the double entry cyclone is utilized in treating the primary feed and the secondary feed along with heat inside the double entry cyclone. Furthermore, the first outlet is utilized for releasing the dehydrated fumed silica particles and the second outlet is utilized for releasing the water molecules and other gases.

First claim

What is claimed is:

1 . A method for performing separation and dehydroxylation of fumed silica particles to manufacture a silica soot preform, the method comprising:
collecting a primary feed of fumed silica particles from a gaseous stream, where the primary feed of fumed silica particles is collected in a fluidized state; collecting a secondary feed of chlorine gas, where the secondary feed of chlorine gas is collected for performing separation and dehydroxylation of the fluidized fumed silica particles; treating the primary feed of the fumed silica particles and the secondary feed of chlorine gas in presence of heat; releasing the dehydrated fumed silica particles, whereby separating and dehydroxylating the fumed silica particles; and performing compaction of the dehydrated fumed silica particles to form the silica soot preform, where the compaction is performed after performing separation and dehydroxylation of the fumed silica particles; where collecting the primary feed of fumed silica particles from a gaseous stream into a double entry cyclone from a first inlet; where collecting the secondary feed of chlorine gas into a double entry cyclone from a second inlet.

2 . The method as claimed in claim 1 comprising, after performing separation of the fumed silica particles, releasing water molecules and gases from a second outlet.

3 . The method as claimed in claim 1 , where the fumed silica particles are treated at a temperature of less than or equal to 200 degree Celsius to remove physisorbed water molecules.

4 . The method as claimed in claim 1 , where the fumed silica particles are treated at a temperature of less than or equal to 1200 degree Celsius to remove chemisorbed water molecules.

Assignees

• Sterlite Tech Ltd

Inventors

• Gaikwad Sandeep
• Dixit Shivi
• Gomatam Badri

Classifications

• B04C5/20

  with heating or cooling, e.g. quenching, means · CPC title

• B04C5/02

  Construction of inlets by which the vortex flow is generated {, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission}(fluid dynamics in general F15D) · CPC title

• B01J2208/00769

  Details of feeding or discharging · CPC title

• B01J8/1827

  the fluidising gas being a reactant · CPC title

• B01J8/0055

  using cyclones · CPC title