Stabilized polybromide resins and method of preparation
US4594361A · kind A · utility
16Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Nov 26, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/766
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Polybromide resin beads for disinfecting potable water are stabilized as to bromide content by: PA1 (A) initially charging excess bromine into an aqueous slurry of quaternary ammonium amine exchange resin beads; PA1 (B) removing external moisture to provide moist sticky beads; PA1 (C) passing gaseous drying agent at controlled temperature and velocity effective to gradually remove internal moisture and excess bromine; and PA1 (D) continuing the gradual drying until dry, free-flowing beads having less than 5% water and 17 to 47% bromine are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.