GB467843A - Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids - Google Patents

Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids

Info

Publication number
GB467843A
GB467843A GB462/36A GB46236A GB467843A GB 467843 A GB467843 A GB 467843A GB 462/36 A GB462/36 A GB 462/36A GB 46236 A GB46236 A GB 46236A GB 467843 A GB467843 A GB 467843A
Authority
GB
United Kingdom
Prior art keywords
acid
aluminium
fluorine
hydrofluoric
solution
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
GB462/36A
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.)
KUNSTDUNGER PATENT VERWERTUNGS
Original Assignee
KUNSTDUNGER PATENT VERWERTUNGS
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 KUNSTDUNGER PATENT VERWERTUNGS filed Critical KUNSTDUNGER PATENT VERWERTUNGS
Priority to GB462/36A priority Critical patent/GB467843A/en
Publication of GB467843A publication Critical patent/GB467843A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
    • C01F7/26—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with sulfuric acids or sulfates
    • 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
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/08—Compounds containing halogen
    • C01B33/107—Halogenated silanes
    • C01B33/10705—Tetrafluoride
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/19—Fluorine; Hydrogen fluoride
    • C01B7/191—Hydrogen fluoride
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Fluorine and aluminium are separated from solutions obtained by treatment of raw phosphates with acids such as sulphuric, nitric, or hydrochloric acids, as a complex compound containing F, Ca, SO4, Al, Si, and H2O in the ratio of 34, 21, 4, 4, 24, the ratio of the components of the precipitate present in insufficient quantity in the solution being raised to the necessary amount by addition to the solution or to the acid used. Complete precipitation of aluminium is preferably ensured by having an excess of the remaining components present. Fluorine is preferably added to the acid used as hydrogen fluoride or a soluble fluoride, and precipitation effected in the presence of relatively large quantities of preformed precipitate. In an example, raw phosphate of specified composition is dissolved in nitric acid to which are added small quantities of hydrofluoric and sulphuric acid, precipitation being effected in five hours. From the purified solution, a nearly pure-dicalcium phosphate and a solution of calcium nitrate of 40--45 per cent strength may be obtained. The fluorine content of the solution may be diminished further by adding a little aluminium nitrate and more hydrofluoric and sulphuric acid. The invention may be applied to the production of a phosphoric acid free from lime and aluminium by mixing an aluminium phosphate with a calcium phosphate in such proportions that Ca and Al are present in the ratio of 21 to 4 and treating the mixture with sulphuric and hydrofluoric acids in the ratio of 34 to 12. Fluorine may be recovered from the complex precipitate as a mixture of hydrofluoric acid and silicon tetrafluoride by heating with concentrated sulphuric acid, or the silicon tetrafluoride may be driven off first by heating to 300--400 DEG C., and the hydrofluoric acid be obtained separately by heating with sulphuric acid. Alternatively the precipitate may be decomposed in the presence of steam at 800--900 DEG C. in admixture with silica or clay to obtain the fluorine wholly as hydrofluoric acid, which may be returned to the process if required.
GB462/36A 1936-01-06 1936-01-06 Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids Expired GB467843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB462/36A GB467843A (en) 1936-01-06 1936-01-06 Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB462/36A GB467843A (en) 1936-01-06 1936-01-06 Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids

Publications (1)

Publication Number Publication Date
GB467843A true GB467843A (en) 1937-06-24

Family

ID=9704766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB462/36A Expired GB467843A (en) 1936-01-06 1936-01-06 Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids

Country Status (1)

Country Link
GB (1) GB467843A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683075A (en) * 1951-06-05 1954-07-06 Cannac Res And Dev Company Digestion of phosphate rock
US3044851A (en) * 1960-08-22 1962-07-17 Collier Carbon & Chemical Co Production of ammonium phosphates and product thereof
US3379501A (en) * 1965-02-23 1968-04-23 Fmc Corp Phosphoric acid purification
US3442609A (en) * 1965-02-09 1969-05-06 John N Carothers Process of purifying phosporic acid
US3642439A (en) * 1969-10-15 1972-02-15 Allied Chem Method of separating magnesium from wet-process phosphoric acid
US3993736A (en) * 1975-08-14 1976-11-23 Stauffer Chemical Company Food grade phosphoric acid from wet process acid
US3993733A (en) * 1975-08-14 1976-11-23 Stauffer Chemical Company Food grade alkali metal phosphates from wet process H3 PO4
USRE29149E (en) * 1957-03-29 1977-03-08 Union Oil Company Of California Production of ammonium phosphates and product thereof
US4053561A (en) * 1975-08-14 1977-10-11 Stauffer Chemical Company Removal of fluorine from phosphatic solutions
DE2827762A1 (en) * 1977-06-27 1979-01-18 Occidental Chem Co METHOD FOR PURIFYING PHOSPHORIC ACID
US4379776A (en) * 1981-07-13 1983-04-12 Occidental Research Corporation Process for reducing aluminum and fluorine in phosphoric acids
US4505884A (en) * 1982-05-17 1985-03-19 Occidental Research Corporation Process for producing HF from impure phosphoric acids
US4557748A (en) * 1984-08-24 1985-12-10 Farmland Industries, Inc. Method of lowering the magnesium impurity level of wet-process phosphoric acid during production of liquid fertilizer
US5084261A (en) * 1989-06-22 1992-01-28 Occidental Chemical Corporation Recovery and utilization of gypstack leachate in hemihydrate phosphoric acid process
CN110683514A (en) * 2019-10-29 2020-01-14 贵州新东浩化工材料科技有限公司 Method for purifying and preparing hydrogen fluoride

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683075A (en) * 1951-06-05 1954-07-06 Cannac Res And Dev Company Digestion of phosphate rock
USRE29149E (en) * 1957-03-29 1977-03-08 Union Oil Company Of California Production of ammonium phosphates and product thereof
US3044851A (en) * 1960-08-22 1962-07-17 Collier Carbon & Chemical Co Production of ammonium phosphates and product thereof
US3442609A (en) * 1965-02-09 1969-05-06 John N Carothers Process of purifying phosporic acid
US3379501A (en) * 1965-02-23 1968-04-23 Fmc Corp Phosphoric acid purification
US3642439A (en) * 1969-10-15 1972-02-15 Allied Chem Method of separating magnesium from wet-process phosphoric acid
US4053561A (en) * 1975-08-14 1977-10-11 Stauffer Chemical Company Removal of fluorine from phosphatic solutions
US3993733A (en) * 1975-08-14 1976-11-23 Stauffer Chemical Company Food grade alkali metal phosphates from wet process H3 PO4
US3993736A (en) * 1975-08-14 1976-11-23 Stauffer Chemical Company Food grade phosphoric acid from wet process acid
DE2827762A1 (en) * 1977-06-27 1979-01-18 Occidental Chem Co METHOD FOR PURIFYING PHOSPHORIC ACID
US4136199A (en) 1977-06-27 1979-01-23 Occidental Chemical Company Metallic ion removal from phosphoric acid
US4379776A (en) * 1981-07-13 1983-04-12 Occidental Research Corporation Process for reducing aluminum and fluorine in phosphoric acids
US4505884A (en) * 1982-05-17 1985-03-19 Occidental Research Corporation Process for producing HF from impure phosphoric acids
US4557748A (en) * 1984-08-24 1985-12-10 Farmland Industries, Inc. Method of lowering the magnesium impurity level of wet-process phosphoric acid during production of liquid fertilizer
US5084261A (en) * 1989-06-22 1992-01-28 Occidental Chemical Corporation Recovery and utilization of gypstack leachate in hemihydrate phosphoric acid process
CN110683514A (en) * 2019-10-29 2020-01-14 贵州新东浩化工材料科技有限公司 Method for purifying and preparing hydrogen fluoride

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