GB1263692A - Phosporic acid production - Google Patents

Phosporic acid production

Info

Publication number
GB1263692A
GB1263692A GB689368A GB689368A GB1263692A GB 1263692 A GB1263692 A GB 1263692A GB 689368 A GB689368 A GB 689368A GB 689368 A GB689368 A GB 689368A GB 1263692 A GB1263692 A GB 1263692A
Authority
GB
United Kingdom
Prior art keywords
compound
sulphate
phosphate rock
silica
products
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
GB689368A
Inventor
John Cross
Alexander Thomson
Robert Harry Edwards
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.)
Marchon Products Ltd
Original Assignee
Marchon Products Ltd
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 Marchon Products Ltd filed Critical Marchon Products Ltd
Priority to GB689368A priority Critical patent/GB1263692A/en
Priority to NL6901880A priority patent/NL6901880A/xx
Priority to FR6903188A priority patent/FR2001750A1/fr
Priority to BE728281D priority patent/BE728281A/xx
Publication of GB1263692A publication Critical patent/GB1263692A/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)
  • Silicon Compounds (AREA)

Abstract

1,263,692. Phosphoric acid from phosphate rock. MARCHON PRODUCTS Ltd. 11 April, 1969 [12 Feb., 1968], No. 6893/68. Heading C1A. Phosphoric acid in admixture with an alkali metal or ammonium phosphate -is produced by treating phosphate rock with sulphuric acid and an alkali metal or ammonium "compound" wherein the stability of the reaction system is enhanced by the addition of "reactive silica" to the system. The "compound" may be the sulphate or a compound which upon reaction with sulphuric acid yields the sulphate and water or volatile products only. "Reactive silica" is a material which readily forms a colloidal silica solution in acid. The P 2 O 5 content of the liquid phase is preferably maintained below 30% by weight, and the SO 3 content thereof between 25 and 30 g./l. The "reactive silica" may comprise 0À25-1% by weight based on phosphate rock and may be silica gel, diatomaceous earth, hydrolysis products of fluorosilicates, or calcium silicate. The compound may be a hydroxide or carbonate. When the "compound" is the sulphate it preferably accounts for 7-11% of the sulphate ions present. In this context, "stability" refers to the production of filterable gypsum crystals in a constant range of crystal sizes and shapes and in which the phosphate rock is substantially completely dissolved.
GB689368A 1968-02-12 1968-02-12 Phosporic acid production Expired GB1263692A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB689368A GB1263692A (en) 1968-02-12 1968-02-12 Phosporic acid production
NL6901880A NL6901880A (en) 1968-02-12 1969-02-06
FR6903188A FR2001750A1 (en) 1968-02-12 1969-02-11
BE728281D BE728281A (en) 1968-02-12 1969-02-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB689368A GB1263692A (en) 1968-02-12 1968-02-12 Phosporic acid production

Publications (1)

Publication Number Publication Date
GB1263692A true GB1263692A (en) 1972-02-16

Family

ID=9822736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB689368A Expired GB1263692A (en) 1968-02-12 1968-02-12 Phosporic acid production

Country Status (4)

Country Link
BE (1) BE728281A (en)
FR (1) FR2001750A1 (en)
GB (1) GB1263692A (en)
NL (1) NL6901880A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105748A (en) * 1976-06-15 1978-08-08 Pennzoil Company Method of producing phosphoric acid and potassium dihydrogen phosphate from phosphate rock in the substantial absence of fluorine evolution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105748A (en) * 1976-06-15 1978-08-08 Pennzoil Company Method of producing phosphoric acid and potassium dihydrogen phosphate from phosphate rock in the substantial absence of fluorine evolution

Also Published As

Publication number Publication date
FR2001750A1 (en) 1969-10-03
NL6901880A (en) 1969-08-14
BE728281A (en) 1969-07-16

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