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)

Similar Documents

Publication Publication Date Title
GB879888A (en) Catalyst for the production of formaldehyde from methanol
GB1038164A (en) Process of producing sulphuric acid
GB882302A (en) Production of sodium dichromate
GB989314A (en) Concentration of bichromate solutions
GB891094A (en) Improvements in and relating to per-compounds
GB888189A (en) Recovery of sodium chromate and/or sodium dichromate
GB778836A (en) Improvements in or relating to a process of preparing potassium sulphate, manganese chloride and/or manganese hydroxide
GB888188A (en) Improvements in the preparation of alkali metal dichromate
GB811519A (en) Improvements in or relating to the production of hydroquinone
GB872130A (en) Improvements in and relating to a process for preparing acetylsalicyclic acid anhydride
GB666628A (en) Production of calcium chromate
GB939905A (en) A process for preparing a penillic acid and salts thereof
GB787172A (en) Process for the production of sodium sulphide
GB1000676A (en) Water electrolysis process
GB991552A (en) Improvements in or relating to the manufacture of homocysteic acid
SU129667A1 (en) Method for improving composition of carbon-free ferrochrome
GB902149A (en) Production of nickel sulphate from green nickel oxide
GB902389A (en) Process for preparing an ª+-halogeno-ª+-lactam
GB860651A (en) An improved bleaching composition
GB786007A (en) Thiazolo-pyrimidines
GB962589A (en) Improvements in and relating to methods of preparing a solution of aluminium sulphate free from silica
GB826023A (en) Process for the manufacture of sodium sulphide from sodium sulphate
GB868321A (en) Stable, aqueous ferroglycocoll sulphate complex solutions and process for the production thereof
GB884678A (en) Production of ª-, ª+-dihydroxy-ª-, ª--dimethylbutyramide
GB786740A (en) Production of potassium nitrate