GB888189A - Recovery of sodium chromate and/or sodium dichromate - Google Patents

Recovery of sodium chromate and/or sodium dichromate

Info

Publication number
GB888189A
GB888189A GB6289/60A GB628960A GB888189A GB 888189 A GB888189 A GB 888189A GB 6289/60 A GB6289/60 A GB 6289/60A GB 628960 A GB628960 A GB 628960A GB 888189 A GB888189 A GB 888189A
Authority
GB
United Kingdom
Prior art keywords
sodium
dichromate
solution
chromate
sodium dichromate
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
GB6289/60A
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.)
Columbia Southern Chemical Corp
Original Assignee
Columbia Southern Chemical Corp
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 Columbia Southern Chemical Corp filed Critical Columbia Southern Chemical Corp
Publication of GB888189A publication Critical patent/GB888189A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/14—Chromates; Bichromates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

An aqueous solution of sodium chromate and sodium dichromate, in which 40% to 98% of its CrO3 content is present as sodium dichromate, is concentrated until sodium chromate crystallizes out of solution, the sodium chromate is removed while the mother liquor is kept at above 50 DEG C., e.g. 70 DEG to 125 DEG C., and then the mother liquor is cooled, e.g. to below 40 DEG C., to crystallize out the sodium dichromate, which is removed. The starting solution may be one obtained by reacting carbon dioxide with a solution obtained by leaching the product resulting from calcining a mixture of sodium carbonate and chromite ore; preferably sodium dichromate is added to the solution before the reaction with carbon dioxide, as described in Specification 882,302. Examples are given.
GB6289/60A 1959-03-06 1960-02-23 Recovery of sodium chromate and/or sodium dichromate Expired GB888189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US888189XA 1959-03-06 1959-03-06

Publications (1)

Publication Number Publication Date
GB888189A true GB888189A (en) 1962-01-31

Family

ID=22213677

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6289/60A Expired GB888189A (en) 1959-03-06 1960-02-23 Recovery of sodium chromate and/or sodium dichromate

Country Status (1)

Country Link
GB (1) GB888189A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012058801A1 (en) * 2010-11-02 2012-05-10 天津派森科技有限责任公司 A hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012058801A1 (en) * 2010-11-02 2012-05-10 天津派森科技有限责任公司 A hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome
GB2501994A (en) * 2010-11-02 2013-11-13 Tianjin Passion Science And Technology Co Ltd A hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome
US9157133B2 (en) 2010-11-02 2015-10-13 Tianjin Passion Science And Technology Co., Ltd. Hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome
GB2501994B (en) * 2010-11-02 2018-09-12 Tianjin Passion Science And Tech Co Ltd A hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome

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