Process for producing sulfonated solid particles
US6821334B2 · kind B2 · utility
10Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Apr 22, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process produces a sulfonated solid particle by burning sulfur to yield gaseous sulfur dioxide, subjecting the gaseous sulfur dioxide to catalytic oxidation to yield gaseous sulfur trioxide, and sulfonating a dry powdery or granular solid particle with the gaseous sulfur trioxide in a gas phase-solid phase reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.