GB899882A - Method of forming uniform uncontaminated iron oxide for pigment and other uses - Google Patents

Method of forming uniform uncontaminated iron oxide for pigment and other uses

Info

Publication number
GB899882A
GB899882A GB1605259A GB1605259A GB899882A GB 899882 A GB899882 A GB 899882A GB 1605259 A GB1605259 A GB 1605259A GB 1605259 A GB1605259 A GB 1605259A GB 899882 A GB899882 A GB 899882A
Authority
GB
United Kingdom
Prior art keywords
seeds
hydroxide
iron
oxidizing
iron oxide
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
GB1605259A
Inventor
Paul Alfons Florent Cauterman
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.)
Northern Pigment Co Ltd
Original Assignee
Northern Pigment Co Ltd
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 Northern Pigment Co Ltd filed Critical Northern Pigment Co Ltd
Priority to GB1605259A priority Critical patent/GB899882A/en
Publication of GB899882A publication Critical patent/GB899882A/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
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide (Fe2O3)

Abstract

Iron oxide for use as a pigment is prepared by reacting an aqueous solution of ferrous sulphate with an alkali to form a suspension of ferrous hydroxide, oxidizing the hydroxide bubbling air into a suspension of the hydroxide in aqueous iron sulphate solution to form ferric oxide seeds, contacting the seeds with metallic iron in the presence of an aqueous solution of a sulphate of iron and oxygen to form a colloidal iron oxide gel and, either before oxidizing the suspension or before contacting the seeds with metallic iron, centrifuging to remove solid contaminants and oversized seeds. The alkali may be calcium hydroxide. Yellow seeds are obtained by oxidizing the hydroxide in ferrous sulphate solution, and red seeds by oxidizing the hydroxide in ferric sulphate solution. An example is given.
GB1605259A 1959-05-11 1959-05-11 Method of forming uniform uncontaminated iron oxide for pigment and other uses Expired GB899882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1605259A GB899882A (en) 1959-05-11 1959-05-11 Method of forming uniform uncontaminated iron oxide for pigment and other uses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1605259A GB899882A (en) 1959-05-11 1959-05-11 Method of forming uniform uncontaminated iron oxide for pigment and other uses

Publications (1)

Publication Number Publication Date
GB899882A true GB899882A (en) 1962-06-27

Family

ID=10070277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1605259A Expired GB899882A (en) 1959-05-11 1959-05-11 Method of forming uniform uncontaminated iron oxide for pigment and other uses

Country Status (1)

Country Link
GB (1) GB899882A (en)

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