Process for producing glass microspheres
US4661137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1985 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Jun 20, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process and apparatus for producing hollow glass microspheres. According to embodiments of the invention, particles of a soda-lime-silica glass containing slight amounts of sulfur compounds are suspended in a gaseous current and expanded in a burner, at a treatment temperature at least 100.degree. C. above the working temperature at which the specific type of glass constituting the treated particles is made from its raw materials, such as sand, lime, sodium carbonate, sodium sulfate, and others, depending on the particular type of glass. The process makes it possible to increase the yield of the transformation of the particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.