Sulfonation apparatus
US4097242A · kind A · utility
2Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1977 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | Apr 22, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A sulfonation apparatus comprising a plurality of vertical first-stage reaction tubes in which the sulfonatable material and an SO.sub.3 -containing gas are flowed upwardly from the lower ends thereof and a single vertical second-stage reaction tube in which the reaction products from the upper ends of all of the first-stage reaction tubes are combined and are flowed downwardly together with fresh SO.sub.3 -containing gas in order to complete the sulfonation reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.