GB470428A - Improvements in the manufacture and production of concentrated phosphoric acid - Google Patents

Improvements in the manufacture and production of concentrated phosphoric acid

Info

Publication number
GB470428A
GB470428A GB479736A GB479736A GB470428A GB 470428 A GB470428 A GB 470428A GB 479736 A GB479736 A GB 479736A GB 479736 A GB479736 A GB 479736A GB 470428 A GB470428 A GB 470428A
Authority
GB
United Kingdom
Prior art keywords
sulphuric acid
phosphate
calcium sulphate
phosphoric acid
concentrated phosphoric
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
GB479736A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB479736A priority Critical patent/GB470428A/en
Priority to FR814760D priority patent/FR814760A/en
Publication of GB470428A publication Critical patent/GB470428A/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
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Concentrated phosphoric acid is obtained by reacting rock phosphate with sulphuric acid of more than 50 per cent strength in an amount which is more than double the amount which is stoichiometrically equivalent to the lime content of the crude phosphate, separating the calcium sulphate formed from the liquid, and adding further amounts of crude phosphate to the liquid to convert the remaining sulphuric acid into calcium sulphate, a temperature of at least 80 DEG C. being maintained in the single stages of the decomposition. The rock phosphate may be added in several successive batches (say five) with the intervening removal of calcium sulphate. In the latter modification further sulphuric acid may be added to decompose the last batch of rock phosphate. Preferably 70 per cent sulphuric acid is employed at a temperature of 90--100 DEG C.
GB479736A 1936-02-17 1936-02-17 Improvements in the manufacture and production of concentrated phosphoric acid Expired GB470428A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB479736A GB470428A (en) 1936-02-17 1936-02-17 Improvements in the manufacture and production of concentrated phosphoric acid
FR814760D FR814760A (en) 1936-02-17 1936-12-10 Process for preparing concentrated phosphoric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB479736A GB470428A (en) 1936-02-17 1936-02-17 Improvements in the manufacture and production of concentrated phosphoric acid

Publications (1)

Publication Number Publication Date
GB470428A true GB470428A (en) 1937-08-16

Family

ID=9783964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB479736A Expired GB470428A (en) 1936-02-17 1936-02-17 Improvements in the manufacture and production of concentrated phosphoric acid

Country Status (2)

Country Link
FR (1) FR814760A (en)
GB (1) GB470428A (en)

Also Published As

Publication number Publication date
FR814760A (en) 1937-06-29

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