GB385646A - Improved manufacture of a red pigment of iron oxide - Google Patents

Improved manufacture of a red pigment of iron oxide

Info

Publication number
GB385646A
GB385646A GB19794/31A GB1979431A GB385646A GB 385646 A GB385646 A GB 385646A GB 19794/31 A GB19794/31 A GB 19794/31A GB 1979431 A GB1979431 A GB 1979431A GB 385646 A GB385646 A GB 385646A
Authority
GB
United Kingdom
Prior art keywords
ferric
iron
hydroxide
under pressure
sulphur
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
GB19794/31A
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
Publication of GB385646A publication Critical patent/GB385646A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00Compounds of iron
    • C01G49/02Oxides; Hydroxides
    • C01G49/06Ferric oxide [Fe2O3]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

A process of obtaining iron oxide pigments by heating under pressure iron compounds after moistening with dilute ferric salt solutions, such as ferric chloride or sulphate, which if desired may be formed in the mixture by adding acids, is characterized in that the iron compounds used are iron rust, or ferric hydroxides of the same physical structure, having little water and of natural or artificial origin. Temperatures of 130-150 DEG C. or over with corresponding pressures up to 6 atmospheres are specified. The time of heating varies from 1 to 5 hours. There may be added sulphur up to 30 per cent of the total, either elementary or in chemical combination, for example, as iron sulphur compounds from which it is subsequently liberated. Operating in this manner, greater dilution of the reaction mixture may be used, a stiff cement-like paste being otherwise employed. Sulphur is subsequently extracted by a solvent. Suitable artificial ferric hydroxides may be obtained by slowly oxidizing divalent iron compounds, such as the hydroxide with oxygen in a moist acid atmosphere. Thus, a paste of ferrous sulphide and hydroxide and hydrochloric acid is treated with air in a rotary mixer at ordinary temperature. Suitable naturally-occurring ferric hydroxides are specified. In a statement of the prior art, the following attempted processes of producing iron oxide pigments are referred to:--calcination of iron rust, or of precipitated ferric hydroxide with or without ferric chloride; boiling ferric hydroxides under pressure up to 20 atmospheres with water or ferric salt solutions; conversion of ferrosoferric oxide under pressure with oxygen or gases containing it.
GB19794/31A 1930-07-11 1931-07-09 Improved manufacture of a red pigment of iron oxide Expired GB385646A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE385646X 1930-07-11

Publications (1)

Publication Number Publication Date
GB385646A true GB385646A (en) 1933-01-05

Family

ID=6370845

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19794/31A Expired GB385646A (en) 1930-07-11 1931-07-09 Improved manufacture of a red pigment of iron oxide

Country Status (1)

Country Link
GB (1) GB385646A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633407A (en) * 1947-08-25 1953-03-31 Mineral Pigments Corp Process for producing red unhydrated iron oxide
US2665193A (en) * 1948-11-22 1954-01-05 Minnesota Mining & Mfg Red iron oxide of high color purity and process of making same
US2716595A (en) * 1949-01-28 1955-08-30 C K Williams & Co Manufacture of red hydrous ferric oxide
SG159428A1 (en) * 2008-09-02 2010-03-30 Cheng Kit Yew Vci (vapor corrosion inhibitor) preservation methodology of armored vehicles, battle tanks, and transport vehicles over cycles of two years.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633407A (en) * 1947-08-25 1953-03-31 Mineral Pigments Corp Process for producing red unhydrated iron oxide
US2665193A (en) * 1948-11-22 1954-01-05 Minnesota Mining & Mfg Red iron oxide of high color purity and process of making same
US2716595A (en) * 1949-01-28 1955-08-30 C K Williams & Co Manufacture of red hydrous ferric oxide
SG159428A1 (en) * 2008-09-02 2010-03-30 Cheng Kit Yew Vci (vapor corrosion inhibitor) preservation methodology of armored vehicles, battle tanks, and transport vehicles over cycles of two years.

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