ES464265A1 - Un procedimiento para la preparacion de tripolifosfato sodi-co. - Google Patents
Un procedimiento para la preparacion de tripolifosfato sodi-co.Info
- Publication number
- ES464265A1 ES464265A1 ES464265A ES464265A ES464265A1 ES 464265 A1 ES464265 A1 ES 464265A1 ES 464265 A ES464265 A ES 464265A ES 464265 A ES464265 A ES 464265A ES 464265 A1 ES464265 A1 ES 464265A1
- Authority
- ES
- Spain
- Prior art keywords
- aqueous solution
- preparation
- solution
- neutralized
- sodium tripolyphosphate
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
- C01B25/301—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates
- C01B25/303—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates with elimination of impurities
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/40—Polyphosphates
- C01B25/41—Polyphosphates of alkali metals
- C01B25/412—Preparation from alkali metal orthophosphates
- C01B25/416—Pure alkali metal polyphosphates from impure starting materials
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Un procedimiento para la preparación de tripolifosfato sódico en donde se neutraliza una solución acuosa de ácido fosfórico obtenida con el método húmedo mediante la adición de una solución acuosa de hidróxido sódico, se separan las impurezas precipitadas de la solución de fosfatos sódico, se evapora la solución de fosfato sódico hasta sequedad y se calcina el residuo de evaporación, caracterizado porque dicha solución acuosa de ácido fosfórico se neutraliza a una temperatura que no exceda de 85ºC, se deja madurar el producto de neutralización a una temperatura comprendida entre 70º y 85º durante un periódo de por lo menos una hora antes de separar dichas impurezas precipitadas.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT29543/76A IT1125158B (it) | 1976-11-19 | 1976-11-19 | Miglioramenti nei procedimenti per la preparazione di tripolifosfato sodico |
Publications (1)
Publication Number | Publication Date |
---|---|
ES464265A1 true ES464265A1 (es) | 1978-08-01 |
Family
ID=11227618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES464265A Expired ES464265A1 (es) | 1976-11-19 | 1977-11-18 | Un procedimiento para la preparacion de tripolifosfato sodi-co. |
Country Status (8)
Country | Link |
---|---|
US (1) | US4146575A (es) |
AU (1) | AU501276B2 (es) |
ES (1) | ES464265A1 (es) |
FR (1) | FR2371382A1 (es) |
GB (1) | GB1590098A (es) |
IN (1) | IN146258B (es) |
IT (1) | IT1125158B (es) |
ZA (1) | ZA776558B (es) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3437684C1 (de) * | 1984-10-15 | 1986-06-05 | Hoechst Ag, 6230 Frankfurt | Verfahren zur Reduktion von Eisen und Vanadium in phosphorsaurer Lösung |
DE3437686C2 (de) * | 1984-10-15 | 1986-10-02 | Hoechst Ag, 6230 Frankfurt | Verfahren zur Reduktion von Metallionen in wäßrigen Lösungen |
DE3444975A1 (de) * | 1984-12-10 | 1986-06-12 | Hoechst Ag, 6230 Frankfurt | Verfahren zur entarsenierung von phosphorsauren loesungen |
US4676963A (en) * | 1986-05-09 | 1987-06-30 | Fmc Corporation | Manufacture of sodium tripolyphosphate from wet acid |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1825965A (en) * | 1928-07-14 | 1931-10-06 | Bowker Chemical Company | Production of disodium phosphate |
US1998182A (en) * | 1932-07-16 | 1935-04-16 | Victor Chemical Works | Production of di-sodium phosphate |
US3081151A (en) * | 1958-09-23 | 1963-03-12 | Saint Gobain | Manufacture of alkali orthophosphates |
GB1104900A (en) * | 1964-05-04 | 1968-03-06 | Marchon Products Ltd | Improvements in the manufacture of alkali metal phosphates |
US3421845A (en) * | 1965-06-07 | 1969-01-14 | Hooker Chemical Corp | Production of sodium phosphates |
-
1976
- 1976-11-19 IT IT29543/76A patent/IT1125158B/it active
-
1977
- 1977-11-02 GB GB45568/77A patent/GB1590098A/en not_active Expired
- 1977-11-03 ZA ZA00776558A patent/ZA776558B/xx unknown
- 1977-11-03 US US05/848,422 patent/US4146575A/en not_active Expired - Lifetime
- 1977-11-04 IN IN1588/CAL/77A patent/IN146258B/en unknown
- 1977-11-09 FR FR7734374A patent/FR2371382A1/fr active Granted
- 1977-11-14 AU AU30597/77A patent/AU501276B2/en not_active Expired
- 1977-11-18 ES ES464265A patent/ES464265A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT1125158B (it) | 1986-05-14 |
US4146575A (en) | 1979-03-27 |
AU501276B2 (en) | 1979-06-14 |
GB1590098A (en) | 1981-05-28 |
FR2371382B1 (es) | 1981-05-08 |
ZA776558B (en) | 1978-08-30 |
FR2371382A1 (fr) | 1978-06-16 |
IN146258B (es) | 1979-04-07 |
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