GB1044254A – Process for the preparation of potassium metaphosphates
– Google Patents
GB1044254A – Process for the preparation of potassium metaphosphates
– Google Patents
Process for the preparation of potassium metaphosphates
Info
Publication number
GB1044254A
GB1044254A
GB6063/64A
GB606364A
GB1044254A
GB 1044254 A
GB1044254 A
GB 1044254A
GB 6063/64 A
GB6063/64 A
GB 6063/64A
GB 606364 A
GB606364 A
GB 606364A
GB 1044254 A
GB1044254 A
GB 1044254A
Authority
GB
United Kingdom
Prior art keywords
bath
kpo3
kcl
phosphoric acid
product
Prior art date
1963-02-26
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
Application number
GB6063/64A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOC ETU CHIMIQUES IND ET AGRI
Original Assignee
SOC ETU CHIMIQUES IND ET AGRI
Priority date (The priority date 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 date listed.)
1963-02-26
Filing date
1964-02-13
Publication date
1966-09-28
1964-02-13
Application filed by SOC ETU CHIMIQUES IND ET AGRI
filed
Critical
SOC ETU CHIMIQUES IND ET AGRI
1966-09-28
Publication of GB1044254A
publication
Critical
patent/GB1044254A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C05—FERTILISERS; MANUFACTURE THEREOF
C05B—PHOSPHATIC FERTILISERS
C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
C05B13/06—Alkali and alkaline earth meta- or polyphosphate fertilisers
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
C01B25/44—Metaphosphates
C01B25/445—Metaphosphates of alkali metals
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
C01B25/455—Phosphates containing halogen
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P20/00—Technologies relating to chemical industry
Y02P20/10—Process efficiency
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P20/00—Technologies relating to chemical industry
Y02P20/10—Process efficiency
Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
Potassium metaphosphate, (KPO3)n, is prepared from phosphoric acid and potassium chloride by reacting these compounds on the surface of a fused salt bath, consisting essentially of the final product of the reaction, which is maintained near its melting point by means of heat supplied partly externally to the bath and partly within the bath. KCl and phosphoric acid of P2O5 content desirably more than 25% are fed in substantially equimolar proportions on to a liquid (KPO3)n bath, contained in a tank furnace lined with refractory material and insulated only on the walls in direct contact with the bath. External heating may be supplied by a burner placed between the bath surface and furnace roof and/or by a radiant heating roof. Internal heating, provided by applying a voltage between graphite electrodes preferably totally immersed in the bath, comprises, e.g., 5 to 50% of the heat required to maintain the bath temperature between, say, 560 DEG to 850 DEG C. The molten (KPO3)n produced leaves the tank by overflow and a water-soluble product is obtained by strong cooling, e.g. on a water-cooled metal belt-conveyer or rotary drum. The solid (KPO3)n is then ground and screened. Other cooling procedures include feeding the molten product on to a spraying apparatus whereby cooling and granulating are effected together. The gases leaving the furnace, containing HCl, may be passed into heat exchangers, the heat recovered being used to preheat the combustion air of the burner, and thence to a conventional absorption device for obtaining aqueous HCl. An excess of KCl may be used to obtain a (KPO3)n/KCl fertilizer and sulphuric acid may be incorporated with the reactants to yield a K2SO4-containing product. The melting temperature of the (KPO3)n bath may be lowered, e.g. by metal oxide impurities present in the phosphoric acid used or by addition of compounds such as K2SO4, metal oxides and metal salts.
GB6063/64A
1963-02-26
1964-02-13
Process for the preparation of potassium metaphosphates
Expired
GB1044254A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR926021A
FR1357727A
(en)
1963-02-26
1963-02-26
Process for preparing potassium phosphate
Publications (1)
Publication Number
Publication Date
GB1044254A
true
GB1044254A
(en)
1966-09-28
Family
ID=8797891
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB6063/64A
Expired
GB1044254A
(en)
1963-02-26
1964-02-13
Process for the preparation of potassium metaphosphates
Country Status (5)
Country
Link
US
(1)
US3378340A
(en)
BE
(1)
BE644248A
(en)
FR
(1)
FR1357727A
(en)
GB
(1)
GB1044254A
(en)
NL
(1)
NL6400649A
(en)
Families Citing this family (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR1377348A
(en)
*
1963-08-07
1964-11-06
Prod Chim Du Limbourg
Process for preparing potassium phosphate
US4360625A
(en)
*
1979-12-14
1982-11-23
Monsanto Company
Acicular, crystalline calcium metaphosphate
US4824649A
(en)
*
1987-08-31
1989-04-25
Stauffer Chemical Company
High viscosity potassium metaphosphate
CN103304301B
(en)
*
2013-06-29
2015-02-11
贵州省五谷惠生态农业科技有限公司
Production method of controlled-release phosphorus potassium fertilizer
CN106348272B
(en)
*
2016-09-23
2018-06-08
武汉工程大学
The technique that a kind of solid phosphoric acid potassium dihydrogen melting arsenic removal prepares food-grade potassium metaphosphate
CN111348635A
(en)
*
2020-04-10
2020-06-30
上海太洋科技有限公司
Preparation method of optical-grade potassium metaphosphate
CN116924380A
(en)
*
2023-09-15
2023-10-24
山东海化集团有限公司
Preparation method of sodium difluorophosphate
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2167757A
(en)
*
1936-07-11
1939-08-01
Monsanto Chemicals
Manufacture of tetra alkali-metal pyrophosphate and chlorine
US2280848A
(en)
*
1939-12-15
1942-04-28
Gordon R Pole
Making alkali metal phosphates
US2888321A
(en)
*
1955-09-13
1959-05-26
Int Minerals & Chem Corp
Manufacture of alkali metal polyphosphates
US2988439A
(en)
*
1957-04-30
1961-06-13
Int Minerals & Chem Corp
Method of preparing a potassium polyphosphate glass fertilizer
US3049419A
(en)
*
1957-08-01
1962-08-14
Scottish Agricultural Ind Ltd
Granular fertilisers
US3132020A
(en)
*
1961-01-19
1964-05-05
Kalk Chemische Fabrik Gmbh
Production of granulated fertilizers
0
BE
BE644248D
patent/BE644248A/xx
unknown
1963
1963-02-26
FR
FR926021A
patent/FR1357727A/en
not_active
Expired
1964
1964-01-28
NL
NL6400649A
patent/NL6400649A/xx
unknown
1964-02-13
GB
GB6063/64A
patent/GB1044254A/en
not_active
Expired
1964-02-17
US
US345089A
patent/US3378340A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
NL6400649A
(en)
1964-08-27
FR1357727A
(en)
1964-04-10
BE644248A
(en)
1900-01-01
US3378340A
(en)
1968-04-16
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