GB1243802A - Purification of fluosilicic acid - Google Patents

Purification of fluosilicic acid

Info

Publication number
GB1243802A
GB1243802A GB4561868A GB4561868A GB1243802A GB 1243802 A GB1243802 A GB 1243802A GB 4561868 A GB4561868 A GB 4561868A GB 4561868 A GB4561868 A GB 4561868A GB 1243802 A GB1243802 A GB 1243802A
Authority
GB
United Kingdom
Prior art keywords
fluosilicic acid
acid
concentration
vapour
fluosilicic
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
GB4561868A
Inventor
Martin English
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.)
Mitchell Ltd L A
Original Assignee
Mitchell Ltd L A
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 Mitchell Ltd L A filed Critical Mitchell Ltd L A
Priority to GB4561868A priority Critical patent/GB1243802A/en
Publication of GB1243802A publication Critical patent/GB1243802A/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
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/08—Compounds containing halogen
    • C01B33/10—Compounds containing silicon, fluorine, and other elements
    • C01B33/103—Fluosilicic acid; Salts thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

1,243,802. Fluosilicic acid purification. L. A. MITCHELL Ltd. 6 Oct., 1969 [25 Sept., 1968], No. 45618/68. Heading C1A. Fluosilicic acid is purified by adding its aqueous solution to a boiling solution of concentrated phosphoric acid, scrubbing the vapour produced with fluosilicic acid of concentration over 30% by weight, then absorbing hydrogen fluoride and silicon fluoride from the vapour in water or fluosilicic acid of concentration less than 30%. In an example, fluosilicic acid, concentration 15-30%, is fed to an evaporator containing phosphoric acid, concentration 45- 55% P 2 0 5 , from which it is evaporated at reduced pressure and at 65-95‹ C. The vapour is then sprayed with saturated fluosilicic acid; in a scrubber, and finally dissolved in cool fluosilicic acid in a scrubbing tower.
GB4561868A 1968-09-25 1968-09-25 Purification of fluosilicic acid Expired GB1243802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4561868A GB1243802A (en) 1968-09-25 1968-09-25 Purification of fluosilicic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4561868A GB1243802A (en) 1968-09-25 1968-09-25 Purification of fluosilicic acid

Publications (1)

Publication Number Publication Date
GB1243802A true GB1243802A (en) 1971-08-25

Family

ID=10437908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4561868A Expired GB1243802A (en) 1968-09-25 1968-09-25 Purification of fluosilicic acid

Country Status (1)

Country Link
GB (1) GB1243802A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008130A (en) * 1976-02-23 1977-02-15 The Dow Chemical Company Method for distilling a ternary azeotrope of fluorosilicic acid, hydrogen fluoride and water
CN112717443A (en) * 2020-12-22 2021-04-30 四川大学 Concentration process of fluosilicic acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008130A (en) * 1976-02-23 1977-02-15 The Dow Chemical Company Method for distilling a ternary azeotrope of fluorosilicic acid, hydrogen fluoride and water
CN112717443A (en) * 2020-12-22 2021-04-30 四川大学 Concentration process of fluosilicic acid

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