Combined treatment device and method for surface modification of fumed silica
US12234361B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 9, 2022 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Dec 21, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D1/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure relates to a combined treatment method for surface modification of fumed silica, which comprises the following steps: (1) two sets of modification devices are used to jointly treat fumed silica; the fumed silica is modified with a modifier in the reaction furnace of each set of modification devices to obtain two groups of modified fumed silica and exhaust gas respectively; (2) the exhaust gas obtained in step (1) is separated respectively to obtain unreacted modifier and by-products, and the obtained by-products are input into the reaction furnace of the other set of modification devices as reaction assistants to participate in the modification reaction; and the obtained unreacted modifiers are returned to the reaction furnace of the original modification device for repeated use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.