FR2390380A1 - Recovering phosphates from aluminium bright dip operations - by reaction with sodium hydroxide to form useful trisodium phosphate - Google Patents

Recovering phosphates from aluminium bright dip operations - by reaction with sodium hydroxide to form useful trisodium phosphate

Info

Publication number
FR2390380A1
FR2390380A1 FR7714130A FR7714130A FR2390380A1 FR 2390380 A1 FR2390380 A1 FR 2390380A1 FR 7714130 A FR7714130 A FR 7714130A FR 7714130 A FR7714130 A FR 7714130A FR 2390380 A1 FR2390380 A1 FR 2390380A1
Authority
FR
France
Prior art keywords
na3po4
waste
naalo2
nano3
naoh
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.)
Granted
Application number
FR7714130A
Other languages
French (fr)
Other versions
FR2390380B1 (en
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.)
Douglas and Lomason Co
Original Assignee
Douglas and Lomason Co
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 Douglas and Lomason Co filed Critical Douglas and Lomason Co
Priority to FR7714130A priority Critical patent/FR2390380A1/en
Publication of FR2390380A1 publication Critical patent/FR2390380A1/en
Application granted granted Critical
Publication of FR2390380B1 publication Critical patent/FR2390380B1/fr
Granted 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
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
    • 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
    • C01B25/305—Preparation from phosphorus-containing compounds by alkaline treatment
    • C01B25/306—Preparation from phosphorus-containing compounds by alkaline treatment from phosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Phosphate values are recovered from waste aq. acid solns generated in Al bright dip operations and contg. H2PO4 combined with appreciable amts. dissolved AlPO4 and HNO3. The phosphates are recovered as Na2PO4 crystals (including hydrate complexes with NaOH). Recovery is by (a) reacting the waste acid aq. soln. with NaOH or NaOH in combination with Na2CO3 to convert all the AlPO4 to NaAlO2 and Na3PO4, the HNO3 to NaNO3 and the H3PO4 to Na3PO4. NaAlO2, NaNO3 and Na3PO4 are all present as dissolved salts inthe aq. soln., (b) removing part of the Na3PO4 by crystallisation, retaining NaAlO2 and NaNO3 as solubilised salts in the remaining mother liquor and (c) sepg. Na3PO4 crystals from the mother liquor. Prod. Na3PO4 is more widely useful than the fertiliser conventionally prepd. from the waste acid solns. and is produced at a commercially competitive price. The change of use allows rinse acid soln. concn. to be reduced, avoiding waste. Phosphate recovery is maximised, with as little as possible tied up with Al values.
FR7714130A 1977-05-09 1977-05-09 Recovering phosphates from aluminium bright dip operations - by reaction with sodium hydroxide to form useful trisodium phosphate Granted FR2390380A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7714130A FR2390380A1 (en) 1977-05-09 1977-05-09 Recovering phosphates from aluminium bright dip operations - by reaction with sodium hydroxide to form useful trisodium phosphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7714130A FR2390380A1 (en) 1977-05-09 1977-05-09 Recovering phosphates from aluminium bright dip operations - by reaction with sodium hydroxide to form useful trisodium phosphate

Publications (2)

Publication Number Publication Date
FR2390380A1 true FR2390380A1 (en) 1978-12-08
FR2390380B1 FR2390380B1 (en) 1981-07-31

Family

ID=9190560

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7714130A Granted FR2390380A1 (en) 1977-05-09 1977-05-09 Recovering phosphates from aluminium bright dip operations - by reaction with sodium hydroxide to form useful trisodium phosphate

Country Status (1)

Country Link
FR (1) FR2390380A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550181A1 (en) * 1983-08-04 1985-02-08 Griffith Thomas EXTRACTION OF SOLUBLE PHOSPHATES FROM NATURALLY-ORIGIN IRON AND ALUMINUM PHOSPHATES USING HYDROXIDE SOLUTIONS AND ALKALI METAL CARBONATE
CN112827466A (en) * 2020-12-31 2021-05-25 深圳市环保科技集团有限公司 Preparation method and application of aluminum type adsorbent
CN114408888A (en) * 2021-12-23 2022-04-29 广东臻鼎环境科技有限公司 Method for preparing battery-grade iron phosphate powder by using aluminum-containing waste acid solution

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE623449C (en) *
US1897705A (en) * 1931-05-14 1933-02-14 Firm Chemische Werke Vorm H & Method of producing or regenerating alkali-carbonates from alkaline phosphate-solutions
DE622229C (en) * 1934-01-14 1935-11-22 Chemische Werke Vorm H & E Alb Production of trinastrum phosphate
FR2322827A1 (en) * 1975-09-05 1977-04-01 Piesteritz Stickstoff Coarsely crystalline trisodium phosphate dodecahydrate prodn. - in form of free-flowing cubic or spheroidal crystals
US4044106A (en) * 1975-10-15 1977-08-23 Fang Albert Yi Hung Reclamation of phosphate from bright dip drag-out

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE623449C (en) *
US1897705A (en) * 1931-05-14 1933-02-14 Firm Chemische Werke Vorm H & Method of producing or regenerating alkali-carbonates from alkaline phosphate-solutions
DE622229C (en) * 1934-01-14 1935-11-22 Chemische Werke Vorm H & E Alb Production of trinastrum phosphate
FR2322827A1 (en) * 1975-09-05 1977-04-01 Piesteritz Stickstoff Coarsely crystalline trisodium phosphate dodecahydrate prodn. - in form of free-flowing cubic or spheroidal crystals
US4044106A (en) * 1975-10-15 1977-08-23 Fang Albert Yi Hung Reclamation of phosphate from bright dip drag-out

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550181A1 (en) * 1983-08-04 1985-02-08 Griffith Thomas EXTRACTION OF SOLUBLE PHOSPHATES FROM NATURALLY-ORIGIN IRON AND ALUMINUM PHOSPHATES USING HYDROXIDE SOLUTIONS AND ALKALI METAL CARBONATE
CN112827466A (en) * 2020-12-31 2021-05-25 深圳市环保科技集团有限公司 Preparation method and application of aluminum type adsorbent
CN112827466B (en) * 2020-12-31 2023-01-17 深圳市环保科技集团有限公司 Preparation method and application of aluminum type adsorbent
CN114408888A (en) * 2021-12-23 2022-04-29 广东臻鼎环境科技有限公司 Method for preparing battery-grade iron phosphate powder by using aluminum-containing waste acid solution
CN114408888B (en) * 2021-12-23 2023-09-19 广东臻鼎环境科技有限公司 Method for preparing battery grade ferric phosphate powder by using aluminum-containing waste acid liquid

Also Published As

Publication number Publication date
FR2390380B1 (en) 1981-07-31

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