WO2010046916A9 - A method of removing fluoride impurities from trona - Google Patents

A method of removing fluoride impurities from trona Download PDF

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Publication number
WO2010046916A9
WO2010046916A9 PCT/IN2009/000552 IN2009000552W WO2010046916A9 WO 2010046916 A9 WO2010046916 A9 WO 2010046916A9 IN 2009000552 W IN2009000552 W IN 2009000552W WO 2010046916 A9 WO2010046916 A9 WO 2010046916A9
Authority
WO
WIPO (PCT)
Prior art keywords
trona
fluoride impurities
impurities
fluoride
crude
Prior art date
Application number
PCT/IN2009/000552
Other languages
French (fr)
Other versions
WO2010046916A1 (en
Inventor
Soumen Sensarma
Murali Sastry
Original Assignee
Tata Chemicals 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 Tata Chemicals Ltd. filed Critical Tata Chemicals Ltd.
Publication of WO2010046916A1 publication Critical patent/WO2010046916A1/en
Publication of WO2010046916A9 publication Critical patent/WO2010046916A9/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general
    • C01D7/22—Purification
    • C01D7/26—Purification by precipitation or adsorption
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A method for reducing the fluoride impurities in crude trona is disclosed. The method comprises preparing an aqueous solution of crude trona, adding to the aqueous solution of crude trona a calcium or magnesium salt to precipitate fluoride impurities as calcium or magnesium fluoride, and separating the precipitated fluoride impurities from the trona solution to obtain a trona solution with reduced fluoride impurities. A method of producing sodium bicarbonate from crude trona is also disclosed.
PCT/IN2009/000552 2008-10-06 2009-10-05 A method of removing fluoride impurities from trona WO2010046916A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2138MU2008 2008-10-06
IN2138/MUM/2008 2008-10-06

Publications (2)

Publication Number Publication Date
WO2010046916A1 WO2010046916A1 (en) 2010-04-29
WO2010046916A9 true WO2010046916A9 (en) 2010-07-29

Family

ID=42118997

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2009/000552 WO2010046916A1 (en) 2008-10-06 2009-10-05 A method of removing fluoride impurities from trona

Country Status (1)

Country Link
WO (1) WO2010046916A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017093960A1 (en) * 2015-12-04 2017-06-08 Tata Chemicals Limited A process for reducing sodium fluoride content in trona or soda ash
CN109264746A (en) * 2018-10-12 2019-01-25 河南精康制药有限公司 A kind of preparation method of pharmaceutical grade sodium bicarbonate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531080B2 (en) * 1974-11-16 1978-01-14
GB9809232D0 (en) * 1998-04-30 1998-07-01 Brunner Mond & Co Ltd Removal of flouride impurities from soda ash
US20090238740A1 (en) * 2008-03-18 2009-09-24 Tata Chemicals Limited Method of removing fluoride impurities from trona and preparation of sodium bicarbonate

Also Published As

Publication number Publication date
WO2010046916A1 (en) 2010-04-29

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