FR2190726A1 - Concd phosphoric acid purifn - by removing suspended solids in two stages before and after concn - Google Patents

Concd phosphoric acid purifn - by removing suspended solids in two stages before and after concn

Info

Publication number
FR2190726A1
FR2190726A1 FR7223470A FR7223470A FR2190726A1 FR 2190726 A1 FR2190726 A1 FR 2190726A1 FR 7223470 A FR7223470 A FR 7223470A FR 7223470 A FR7223470 A FR 7223470A FR 2190726 A1 FR2190726 A1 FR 2190726A1
Authority
FR
France
Prior art keywords
acid
concn
solids
suspended solids
purifn
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
FR7223470A
Other languages
French (fr)
Other versions
FR2190726B1 (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.)
Spie Batignolles SA
Original Assignee
Spie Batignolles SA
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 Spie Batignolles SA filed Critical Spie Batignolles SA
Priority to FR7223470A priority Critical patent/FR2190726A1/en
Priority to OA54945A priority patent/OA04431A/en
Publication of FR2190726A1 publication Critical patent/FR2190726A1/en
Application granted granted Critical
Publication of FR2190726B1 publication Critical patent/FR2190726B1/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
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/234—Purification; Stabilisation; Concentration
    • C01B25/235—Clarification; Stabilisation to prevent post-precipitation of dissolved impurities

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Process comprises (a) removing most of the sludge formed in tanks holding 28% P2O5 acid, by decantation, but leaving sufficient crystal nuclei in the acid to ensure self-cleaning of the concn. circuit and to prevent desaturation of the acid. after concn. and (b) desaturating the conc (54% P2O5) acid by forced cooling and vacuum filtration, eliminating solids, and recovering, in a storage tank final traces of solids formed subsequently. Acid produced by any process is purified to 0.5% suspended solids with almost 100% recovery of P2O5 values. Recovered solids may be disposed of without recycling; expensive rotating driers and decantors are not required.
FR7223470A 1972-06-29 1972-06-29 Concd phosphoric acid purifn - by removing suspended solids in two stages before and after concn Granted FR2190726A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7223470A FR2190726A1 (en) 1972-06-29 1972-06-29 Concd phosphoric acid purifn - by removing suspended solids in two stages before and after concn
OA54945A OA04431A (en) 1972-06-29 1973-06-22 Method and device for purifying concentrated phosphoric acid.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7223470A FR2190726A1 (en) 1972-06-29 1972-06-29 Concd phosphoric acid purifn - by removing suspended solids in two stages before and after concn

Publications (2)

Publication Number Publication Date
FR2190726A1 true FR2190726A1 (en) 1974-02-01
FR2190726B1 FR2190726B1 (en) 1975-06-13

Family

ID=9101030

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7223470A Granted FR2190726A1 (en) 1972-06-29 1972-06-29 Concd phosphoric acid purifn - by removing suspended solids in two stages before and after concn

Country Status (2)

Country Link
FR (1) FR2190726A1 (en)
OA (1) OA04431A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104480487A (en) * 2014-11-21 2015-04-01 贵阳中化开磷化肥有限公司 Closed cyclic utilization method of water for cleaning wet process phosphoric acid concentration system
CN107485889A (en) * 2017-09-08 2017-12-19 瓮福达州化工有限责任公司 A kind of wet phosphoric acid purifying extracting system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936888A (en) * 1958-07-07 1960-05-17 Int Minerals & Chem Corp Production of clarified acidic phosphatic solutions
FR1334532A (en) * 1962-06-29 1963-08-09 Pechiney Saint Gobain Process for the continuous conditioning of crude phosphoric acid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936888A (en) * 1958-07-07 1960-05-17 Int Minerals & Chem Corp Production of clarified acidic phosphatic solutions
FR1334532A (en) * 1962-06-29 1963-08-09 Pechiney Saint Gobain Process for the continuous conditioning of crude phosphoric acid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104480487A (en) * 2014-11-21 2015-04-01 贵阳中化开磷化肥有限公司 Closed cyclic utilization method of water for cleaning wet process phosphoric acid concentration system
CN104480487B (en) * 2014-11-21 2016-12-07 贵州开磷集团股份有限公司 A kind of cleaning wet-process phosphoric acid concentration system water closed circulation Application way
CN107485889A (en) * 2017-09-08 2017-12-19 瓮福达州化工有限责任公司 A kind of wet phosphoric acid purifying extracting system

Also Published As

Publication number Publication date
FR2190726B1 (en) 1975-06-13
OA04431A (en) 1980-03-15

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Legal Events

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CA Change of address
TP Transmission of property
CL Concession to grant licences
CD Change of name or company name