Method of disinfecting a deionized water producing apparatus and method of producing deionized water
US6461512B1 · kind B1 · utility
27Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Aug 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A deionized water producing apparatus includes a pretreatment apparatus having a reverse osmosis apparatus, and an electrodeionization apparatus having a diluting compartment filled with an ion exchanger. In order to disinfect the deionized water producing apparatus, hot water of higher than 80° C. is flown through the pretreatment apparatus, and hot water of higher than 60° C. is flown through the electrodeionization apparatus. Hot water flowing thorough the electrodeionization apparatus is gradually heated at a rate of 0.1-10° C./min.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.