GB488025A - Improvements in and relating to the softening of water - Google Patents
Improvements in and relating to the softening of waterInfo
- Publication number
- GB488025A GB488025A GB32249/36A GB3224936A GB488025A GB 488025 A GB488025 A GB 488025A GB 32249/36 A GB32249/36 A GB 32249/36A GB 3224936 A GB3224936 A GB 3224936A GB 488025 A GB488025 A GB 488025A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- sulphide
- mixture
- heating
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
Monothiotetraphosphate, for use in softening water, may be prepared by heating a mixture of a metaphosphate and a sulphide of a metal; trithiotetraphosphate by heating a mixture of phosphorus pentoxide and a sulphide of a metal. Other thiotetraphosphates suitable for the purpose may be made by fusing tetraphosphates of alkali metals or ammonium with stoichiometric amounts of sulphur or phosphorus pentasulphide. Specification 476,455 is referred to. Reference has been directed by the Comptroller to U.S.A. Specifications 2,025,503 and 2,033,913.ALSO:Water is softened by the addition of an alkaline metal thiotetraphosphate or other soluble thiotetraphosphate. The treatment may take place in the presence of a soluble soap. Monothiotetraphosphate may be prepared by heating a mixture of a metaphosphate and a sulphide of a metal and trithiotetraphosphate by heating a mixture of phosphorus pentoxide and a sulphide of a metal. Other thiotetraphosphates suitable for the purpose may be made by fusing tetraphosphates of alkali metals or ammonium with stoichiometric amounts of sulphur or phosphorus pentasulphide. British Specification 476,455, [Group III], is referred to. Reference has been directed by the Comptroller to U.S.A. Specifications 2,025,503 and 2,033,913.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US488025XA | 1936-05-15 | 1936-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB488025A true GB488025A (en) | 1938-06-27 |
Family
ID=21956521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32249/36A Expired GB488025A (en) | 1936-05-15 | 1936-11-25 | Improvements in and relating to the softening of water |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB488025A (en) |
-
1936
- 1936-11-25 GB GB32249/36A patent/GB488025A/en not_active Expired
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