GB580181A - Process for the production of chromic hydroxide - Google Patents

Process for the production of chromic hydroxide

Info

Publication number
GB580181A
GB580181A GB2038243A GB2038243A GB580181A GB 580181 A GB580181 A GB 580181A GB 2038243 A GB2038243 A GB 2038243A GB 2038243 A GB2038243 A GB 2038243A GB 580181 A GB580181 A GB 580181A
Authority
GB
United Kingdom
Prior art keywords
hydroxide
potassium
class
sodium
chromic hydroxide
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
GB2038243A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2038243A priority Critical patent/GB580181A/en
Publication of GB580181A publication Critical patent/GB580181A/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
    • C01G37/02—Oxides or hydrates thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Sodium or potassium monochromate solutions are reduced with sodium or potassium monosulphide, yielding chromic hydroxide, alkali sulphate and alkali hydroxide. The latter is separated and used in known methods of chromate production or other well-known technical applications, if desired after conversion to carbonate, bicarbonate, acetate or the like. The precipitated chromic hydroxide may be ignited e.g. at 900 DEG C. to yield a pigment or converted into soluble chromium salts by adding the appropriate acid. The Specification as open to inspection under Section 91 describes also the reduction of chromates and dichromates of ammonium, calcium, strontium, barium, magnesium or lead by sulphides, or their oxidation products, e.g., thiosulphates or polythionates. This subject matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifications 18,743/98, [Class 41], and 336,671, [Class 1 (iii)]
GB2038243A 1943-12-06 1943-12-06 Process for the production of chromic hydroxide Expired GB580181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2038243A GB580181A (en) 1943-12-06 1943-12-06 Process for the production of chromic hydroxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2038243A GB580181A (en) 1943-12-06 1943-12-06 Process for the production of chromic hydroxide

Publications (1)

Publication Number Publication Date
GB580181A true GB580181A (en) 1946-08-29

Family

ID=10145027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2038243A Expired GB580181A (en) 1943-12-06 1943-12-06 Process for the production of chromic hydroxide

Country Status (1)

Country Link
GB (1) GB580181A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100345768C (en) * 2006-03-10 2007-10-31 锦州铁合金股份有限公司 Method for treating chromium hydroxide
CN112110487A (en) * 2020-09-22 2020-12-22 攀钢集团研究院有限公司 Preparation method of easily soluble chromium hydroxide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100345768C (en) * 2006-03-10 2007-10-31 锦州铁合金股份有限公司 Method for treating chromium hydroxide
CN112110487A (en) * 2020-09-22 2020-12-22 攀钢集团研究院有限公司 Preparation method of easily soluble chromium hydroxide

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