GB882302A - Production of sodium dichromate - Google Patents

Production of sodium dichromate

Info

Publication number
GB882302A
GB882302A GB20122/59A GB2012259A GB882302A GB 882302 A GB882302 A GB 882302A GB 20122/59 A GB20122/59 A GB 20122/59A GB 2012259 A GB2012259 A GB 2012259A GB 882302 A GB882302 A GB 882302A
Authority
GB
United Kingdom
Prior art keywords
sodium
solution
sodium dichromate
chromate
cro3
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
GB20122/59A
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 GB882302A publication Critical patent/GB882302A/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

Sodium dichromate is produced by reacting carbon dioxide with an aqueous solution of sodium chromate and sodium dichromate in which the total CrO3 content is at least 35% by weight, the sodium chromate content is at least 5% by weight, and the sodium dichromate content is sufficient to provide at least 20% of the CrO3 in solution. A solution containing at least 40% by weight of sodium chromate is mixed with a solution of sodium dichromate containing a higher concentration of CrO3 than the chromate solution, and passed down a tower in counter-current to carbon dioxide at 10 DEG C. to 75 DEG C. Sodium carbonate is filtered off and a portion of the resulting sodium dichromate solution is concentrated by evaporation and mixed with further sodium chromate solution, and the process continued.
GB20122/59A 1958-06-16 1959-06-12 Production of sodium dichromate Expired GB882302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US882302XA 1958-06-16 1958-06-16

Publications (1)

Publication Number Publication Date
GB882302A true GB882302A (en) 1961-11-15

Family

ID=22210146

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20122/59A Expired GB882302A (en) 1958-06-16 1959-06-12 Production of sodium dichromate

Country Status (1)

Country Link
GB (1) GB882302A (en)

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