US4432959A
Expired / Lapsed
US
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Process of producing sodium cyanuarate
Assignee: Shikoku Chemicals Corp
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Filing: 1982-08-03
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Granted: 1984-02-21
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Expires: 2002-08-03
Abstract
Abstract A process for producing sodium cyanurate in the powdery form is disclosed. In this method, iso cyanuric acid is reacted with sodium carbonate or sodium hydrogencarbonate or a mixture of sodium carbonate and sodium hydrogencarbonate by mixing the raw materials in powdery form and in the presence of water in a range, in which hydrates can be formed from the raw materials at room temperature, while holding the system at a temperature at which free water can be produced.
Inventors
- 👤 Tadao Shimamura
- 👤 Naoki Kano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:30
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/30; C07D251/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
A process of producing sodium isocyanurate by reacting iso cyanuric acid in powder form with a carbonate in powder form selected from the group consisting of sodium carbonate, sodium hydrogencarbonate, and mixtures thereof, wherein at least one of said starting materials in powder form is a hydrate, comprising mixing the starting materials together while maintaining the same at a temperature at which free water is liberated from said hydrate.
Claim 2
Dependent Claim
69 words
A process of producing sodium isocyanurate by reacting iso cyanuric acid in powder form with a carbonate in powder form selected from the group consisting of sodium carbonate, sodium hydrogencarbonate, and mixtures thereof, wherein at least one of said starting materials in powder form is a hydrate, comprising mixing the starting materials together while maintaining the same at a temperature at which free water is liberated from said hydrate.
Claim 3
Dependent Claim
30 words
The process according to claim 1, wherein isocyanuric acid hydrate and anhydrous sodium carbonate are used as starting materials and free water is liberated from said iso cyanuric acid hydrate.
Claim 4
Dependent Claim
29 words
The process according to claim 1, wherein anhydrous isocyanuric acid and sodium carbonate hydrate are used as starting materials and free water is liberated from said sodium carbonate hydrate.
Claim 5
Dependent Claim
17 words
The process according to claim 1 wherein a temperature ranging from 60° to 80° C. is employed.
Claim 6
Dependent Claim
81 words
A process of producing sodium isocyanurate by reacting isocyanuric acid in powder form with a carbonate in powder form selected from the group consisting of sodium carbonate, sodium hydrogen carbonate and mixture thereof, wherein each of said starting materials are in the anhydrated state, comprising adding water to the anhydrates in an amount sufficient to produce hydrates thereof at room temperature, and mixing the same together at a temperature and for a time sufficient to liberate free water from said hydrates.
Claim 7
Dependent Claim
81 words
A process of producing sodium isocyanurate by reacting isocyanuric acid in powder form with a carbonate in powder form selected from the group consisting of sodium carbonate, sodium hydrogen carbonate and mixture thereof, wherein each of said starting materials are in the anhydrated state, comprising adding water to the anhydrates in an amount sufficient to produce hydrates thereof at room temperature, and mixing the same together at a temperature and for a time sufficient to liberate free water from said hydrates.
References Cited (Backward Citations)
GB1006489A
Cited
GB1216063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |