GB1303190A - - Google Patents

Info

Publication number
GB1303190A
GB1303190A GB2718670A GB2718670A GB1303190A GB 1303190 A GB1303190 A GB 1303190A GB 2718670 A GB2718670 A GB 2718670A GB 2718670 A GB2718670 A GB 2718670A GB 1303190 A GB1303190 A GB 1303190A
Authority
GB
United Kingdom
Prior art keywords
scrubbing
gypsum
june
acid
sulphuric 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
GB2718670A
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 filed Critical
Publication of GB1303190A publication Critical patent/GB1303190A/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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/468—Purification of calcium sulfates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Silicon Compounds (AREA)
  • Treating Waste Gases (AREA)

Abstract

1303190 Recovery of fluorine values from gypsum CHEMIEBAU DR A ZIEREN GmbH & CO KG 5 June 1970 [6 June 1969] 27186/70 Heading C1A Fluorine values are recovered from gypsum (obtained by decomposition of phosphate rock with sulphuric acid) by heating to 110-200‹ C. with sufficient sulphuric acid to provide 1À5- 5% wt. of H 2 SO 4 and scrubbing the evolved gas which consists substantially of HF and SiF 4 . The preferred scrubbing solution is aqueous fluosilicic acid which is concentrated by absorbtion of the gases and recycling to the scrubbing stage to obtain a fluosilicic acid of maximum preferred concentration 30% wt.
GB2718670A 1969-06-06 1970-06-05 Expired GB1303190A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1928771 1969-06-06

Publications (1)

Publication Number Publication Date
GB1303190A true GB1303190A (en) 1973-01-17

Family

ID=5736223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2718670A Expired GB1303190A (en) 1969-06-06 1970-06-05

Country Status (5)

Country Link
AT (1) AT298413B (en)
DE (1) DE1928771B1 (en)
FR (1) FR2063886A5 (en)
GB (1) GB1303190A (en)
NL (1) NL7008234A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115784238A (en) * 2022-10-18 2023-03-14 宜都兴发化工有限公司 Method for recovering soluble fluorine in phosphogypsum

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115784238A (en) * 2022-10-18 2023-03-14 宜都兴发化工有限公司 Method for recovering soluble fluorine in phosphogypsum
CN115784238B (en) * 2022-10-18 2024-03-12 宜都兴发化工有限公司 Method for recycling soluble fluorine in phosphogypsum

Also Published As

Publication number Publication date
NL7008234A (en) 1970-12-08
AT298413B (en) 1972-05-10
FR2063886A5 (en) 1971-07-09
DE1928771B1 (en) 1970-01-29

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees