GB1081894A - Improvements relating to the production of phosphoric acids - Google Patents

Improvements relating to the production of phosphoric acids

Info

Publication number
GB1081894A
GB1081894A GB4659564A GB4659564A GB1081894A GB 1081894 A GB1081894 A GB 1081894A GB 4659564 A GB4659564 A GB 4659564A GB 4659564 A GB4659564 A GB 4659564A GB 1081894 A GB1081894 A GB 1081894A
Authority
GB
United Kingdom
Prior art keywords
solids
acid
h3po4
purified
evaporator
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
Application number
GB4659564A
Inventor
William Roy Mustian
James Austin
John David Ellis
Michael Brian Caesar
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.)
Occidental Research and Engineering Ltd
Original Assignee
Occidental Research and Engineering Ltd
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.)
Filing date
Publication date
Application filed by Occidental Research and Engineering Ltd filed Critical Occidental Research and Engineering Ltd
Priority to GB4659564A priority Critical patent/GB1081894A/en
Priority to SE1473665A priority patent/SE308098B/xx
Priority to FI274765A priority patent/FI43981B/fi
Priority to JP7014365A priority patent/JPS4810311B1/ja
Priority to NO16049865A priority patent/NO115385B/no
Publication of GB1081894A publication Critical patent/GB1081894A/en
Expired legal-status Critical Current

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
    • C01B25/24—Condensed phosphoric acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

Wet process H3PO4 is purified by evaporating it in a submerged combustion or analogous evaporator to 80% by weight P2O5 content, thereby forming insoluble compounds of the impurities, diluting the conc. acid to a filterable viscosity and removing the solids therefrom. The purified acid may be reconcentrated in a second evaporator. The solids, which may be separated by e.g. filtration or decantation, may be washed with H2O which is then added to the purified acid. The solids, claimed per se, comprise poly- and meta-phosphates of Al and Fe. These solids may be digested with HCl to forming the chlorides and H3PO4 values, the latter being removed by solvent extraction or ion exclusion, or the solids may be fused with KCl to give KPO3. The gaseous effluent from the evaporators may be condensed, e.g. as described in Specification 1,081,891, and the H3PO4 recovered. Organic impurities may be removed from the impure acid by adding small mounts of an oxidant, e.g. HNO3, KNO3, before concentration.
GB4659564A 1964-11-16 1964-11-16 Improvements relating to the production of phosphoric acids Expired GB1081894A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB4659564A GB1081894A (en) 1964-11-16 1964-11-16 Improvements relating to the production of phosphoric acids
SE1473665A SE308098B (en) 1964-11-16 1965-11-15
FI274765A FI43981B (en) 1964-11-16 1965-11-16
JP7014365A JPS4810311B1 (en) 1964-11-16 1965-11-16
NO16049865A NO115385B (en) 1964-11-16 1965-11-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4659564A GB1081894A (en) 1964-11-16 1964-11-16 Improvements relating to the production of phosphoric acids

Publications (1)

Publication Number Publication Date
GB1081894A true GB1081894A (en) 1967-09-06

Family

ID=10441876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4659564A Expired GB1081894A (en) 1964-11-16 1964-11-16 Improvements relating to the production of phosphoric acids

Country Status (5)

Country Link
JP (1) JPS4810311B1 (en)
FI (1) FI43981B (en)
GB (1) GB1081894A (en)
NO (1) NO115385B (en)
SE (1) SE308098B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526264A (en) * 1967-12-26 1970-09-01 American Magnesium Co Method of concentrating a magnesium chloride solution without producing an exhaust gas plume
US4215098A (en) 1978-04-26 1980-07-29 Albright & Wilson Limited Purification of wet process phosphoric acid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5640402B2 (en) * 1974-01-16 1981-09-21

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526264A (en) * 1967-12-26 1970-09-01 American Magnesium Co Method of concentrating a magnesium chloride solution without producing an exhaust gas plume
US4215098A (en) 1978-04-26 1980-07-29 Albright & Wilson Limited Purification of wet process phosphoric acid

Also Published As

Publication number Publication date
NO115385B (en) 1968-09-30
JPS4810311B1 (en) 1973-04-02
SE308098B (en) 1969-02-03
FI43981B (en) 1971-04-30

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