Process for filtering 2-acrylamido-2-methylpropane sulfonic acid
US12145900B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | May 7, 2020 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Oct 26, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/28
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A continuous process for filtering a suspension of 2-acrylamido-2-methylpropane sulfonic acid crystals by means of a rotary pressure filter equipped with a drum, a surface of which is provided with cells covered with a filter medium, the drum rotating within a fixed concentric cylinder comprising at least three zones sealed from each other, respectively a filtration zone, a washing zone and a discharge zone, each zone opening onto the cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.