GB1155957A - Phosphoric Acid Purification Process. - Google Patents

Phosphoric Acid Purification Process.

Info

Publication number
GB1155957A
GB1155957A GB4253565A GB4253565A GB1155957A GB 1155957 A GB1155957 A GB 1155957A GB 4253565 A GB4253565 A GB 4253565A GB 4253565 A GB4253565 A GB 4253565A GB 1155957 A GB1155957 A GB 1155957A
Authority
GB
United Kingdom
Prior art keywords
phosphoric acid
purification process
cao
alkali metal
acid purification
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
GB4253565A
Inventor
Benn Ripp
Roy William Silvester
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.)
Fisons Fertilizers Ltd
Fisons Ltd
Original Assignee
Fisons Fertilizers Ltd
Fisons 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 Fisons Fertilizers Ltd, Fisons Ltd filed Critical Fisons Fertilizers Ltd
Priority to GB4253565A priority Critical patent/GB1155957A/en
Publication of GB1155957A publication Critical patent/GB1155957A/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
    • C01B25/18—Phosphoric acid
    • C01B25/234—Purification; Stabilisation; Concentration
    • C01B25/237—Selective elimination of impurities
    • C01B25/2372—Anionic impurities, e.g. silica or boron compounds
    • C01B25/2377—Sulfate

Abstract

1,155,957. Purifying phosphoric acid. FISONS FERTILIZERS Ltd. 4 Jan., 1967 [7 Oct., 1965], No. 42535/65. Heading C1A. A process for removing sulphuric acid from phosphoric acid which has been prepared by the wet process which involves concentrating by evaporation the phosphoric acid to more than 38% by weight P 2 0 5 and then treating with CaO, CaCO 3 or a calcium phosphate at 45‹ to 95‹ C. then separating the precipitate and recovering phosphoric acid substantially free from H 2 50 4 . Preferably a stoichiometric amount of CaO is used for the H 2 SO 4 present. Alkali metal hydroxide or alkali metal salt may be added to the solution to remove fluorine.
GB4253565A 1965-10-07 1965-10-07 Phosphoric Acid Purification Process. Expired GB1155957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4253565A GB1155957A (en) 1965-10-07 1965-10-07 Phosphoric Acid Purification Process.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4253565A GB1155957A (en) 1965-10-07 1965-10-07 Phosphoric Acid Purification Process.

Publications (1)

Publication Number Publication Date
GB1155957A true GB1155957A (en) 1969-06-25

Family

ID=10424847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4253565A Expired GB1155957A (en) 1965-10-07 1965-10-07 Phosphoric Acid Purification Process.

Country Status (1)

Country Link
GB (1) GB1155957A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026995A (en) * 1976-02-11 1977-05-31 Atlantic Richfield Company Process for defluorination of commercial phosphoric acid
EP0164087A2 (en) * 1984-06-08 1985-12-11 BASF Aktiengesellschaft Process for reducing the sulphuric acid and impurity content in wet-process phosphoric acid
GB2167737A (en) * 1983-08-03 1986-06-04 Negev Phosphates Ltd Purified phosphoric acid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026995A (en) * 1976-02-11 1977-05-31 Atlantic Richfield Company Process for defluorination of commercial phosphoric acid
GB2167737A (en) * 1983-08-03 1986-06-04 Negev Phosphates Ltd Purified phosphoric acid
EP0164087A2 (en) * 1984-06-08 1985-12-11 BASF Aktiengesellschaft Process for reducing the sulphuric acid and impurity content in wet-process phosphoric acid
EP0164087A3 (en) * 1984-06-08 1988-03-30 Basf Aktiengesellschaft Process for reducing the sulphuric acid and impurity content in wet-process phosphoric acid

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