GB965728A - Method and apparatus for producing phosphoric acids - Google Patents

Method and apparatus for producing phosphoric acids

Info

Publication number
GB965728A
GB965728A GB29930/62A GB2993062A GB965728A GB 965728 A GB965728 A GB 965728A GB 29930/62 A GB29930/62 A GB 29930/62A GB 2993062 A GB2993062 A GB 2993062A GB 965728 A GB965728 A GB 965728A
Authority
GB
United Kingdom
Prior art keywords
circuit
phosphorus pentoxide
concentration
phosphoric acid
acid
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
GB29930/62A
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.)
Knapsack AG
Knapsack Griesheim AG
Original Assignee
Knapsack AG
Knapsack Griesheim AG
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 Knapsack AG, Knapsack Griesheim AG filed Critical Knapsack AG
Publication of GB965728A publication Critical patent/GB965728A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S159/00—Concentrating evaporators
    • Y10S159/19—Acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)

Abstract

Polyphosphoric acids of high concentration are prepared by the combustion of elementary phosphorus with air or other oxygen-containing gas, and absorbing the phosphorus pentoxide so formed in phosphoric acid, wherein the major amount of the heat set free during the combustion reaction is removed by phosphoric acid circulated in a first circuit through a reaction zone comprising a first absorption zone and through a suitable cooling system, a part of the phosphorus pentoxide formed being absorbed simultaneously with removal of heat and concentration, and the residual portion of the phosphorus pentoxide is absorbed in a polyphosphoric acid circulating in a second circuit through a second adsorption zone and a suitable cooling system, wherein the polyphosphoric acid employed in the second circuit has a higher concentration of phosphorus pentoxide than that in the first circuit. The temperature of operation is preferably below 180 DEG C. especially 60-140 DEG C. The concentration of the acids in the circuits may be maintained constant by addition of water and/or commercial phosphoric acid, that added to the second circuit conveniently being acid withdrawn from the first circuit. Specification 929,900 is referred to.
GB29930/62A 1961-08-05 1962-08-03 Method and apparatus for producing phosphoric acids Expired GB965728A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK44440A DE1159403B (en) 1961-08-05 1961-08-05 Process and device for the production of polyphosphoric acid

Publications (1)

Publication Number Publication Date
GB965728A true GB965728A (en) 1964-08-06

Family

ID=7223468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29930/62A Expired GB965728A (en) 1961-08-05 1962-08-03 Method and apparatus for producing phosphoric acids

Country Status (4)

Country Link
US (1) US3387929A (en)
CH (1) CH449595A (en)
DE (1) DE1159403B (en)
GB (1) GB965728A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107226460A (en) * 2016-03-25 2017-10-03 云南派博科技有限公司 The method that peroxophosphoric acid is produced using phosphorus calory burning concentration of dilute phosphoric acid

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1159403B (en) * 1961-08-05 1963-12-19 Knapsack Ag Process and device for the production of polyphosphoric acid
FR2219910B1 (en) * 1973-03-02 1978-09-29 Speichim Equip Ind Chimiq
FR2338470A1 (en) * 1976-01-15 1977-08-12 Lab PROCESS AND INSTALLATION FOR DRYING AND TRANSFORMATION OF SUSPENSION MATERIALS IN LIQUIDS

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898541A (en) * 1929-06-17 1933-02-21 G D Jenssen Company Means for producing acid liquor
US2026519A (en) * 1935-05-15 1936-01-07 Tennessee Valley Authority Apparatus for making phosphoric acid
US2303318A (en) * 1940-09-03 1942-12-01 William H Baskervill Separating hydrated phosphorus pentoxide
DE1041481B (en) * 1953-08-11 1958-10-23 Fmc Corp Process for the production of aqueous phosphoric acid
US2999010A (en) * 1957-03-25 1961-09-05 Tennessee Valley Authority Manufacture of superphosphoric acid
DE1111159B (en) * 1960-03-05 1961-07-20 Knapsack Ag Process and device for the production of polyphosphoric acid
US3015540A (en) * 1960-11-23 1962-01-02 Tennessce Valley Authority Manufacture of superphosphoric acid
DE1159403B (en) * 1961-08-05 1963-12-19 Knapsack Ag Process and device for the production of polyphosphoric acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107226460A (en) * 2016-03-25 2017-10-03 云南派博科技有限公司 The method that peroxophosphoric acid is produced using phosphorus calory burning concentration of dilute phosphoric acid

Also Published As

Publication number Publication date
US3387929A (en) 1968-06-11
CH449595A (en) 1968-01-15
DE1159403B (en) 1963-12-19

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