GB730176A - Improvements in chrome pigments - Google Patents

Improvements in chrome pigments

Info

Publication number
GB730176A
GB730176A GB13464/51A GB1346451A GB730176A GB 730176 A GB730176 A GB 730176A GB 13464/51 A GB13464/51 A GB 13464/51A GB 1346451 A GB1346451 A GB 1346451A GB 730176 A GB730176 A GB 730176A
Authority
GB
United Kingdom
Prior art keywords
lead
silica
alumina
precipitated
silicon dioxide
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
GB13464/51A
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.)
Cromford Colour Co Ltd
Original Assignee
Cromford Colour 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 Cromford Colour Co Ltd filed Critical Cromford Colour Co Ltd
Priority to GB13464/51A priority Critical patent/GB730176A/en
Priority to FR1063109D priority patent/FR1063109A/en
Priority to NL170009A priority patent/NL83801C/en
Priority to BE511918A priority patent/BE511918A/en
Publication of GB730176A publication Critical patent/GB730176A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/14—Compounds of lead
    • C09C1/20—Lead chromate
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Abstract

A process for the manufacture of lead chrome pigments comprises treating a precipitated lead chromate (with or without added lead sulphate) with silica (i.e. silicon dioxide, hydrated silicon dioxide, e.g. silicic acid or soluble silicates) or with silica and alumina (i.e. aluminium oxide or hydrated aluminium oxide). The pigment may be treated with silica and alumina in either order. The lead chromate may be precipitated by adding sodium dichromate and sodium hydroxide to a solution of lead nitrate. A suspension of silicic acid may then be added to the precipitate, preceded or followed by a solution of aluminium sulphate. Specification 568,072 is referred to.
GB13464/51A 1951-06-06 1951-06-06 Improvements in chrome pigments Expired GB730176A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB13464/51A GB730176A (en) 1951-06-06 1951-06-06 Improvements in chrome pigments
FR1063109D FR1063109A (en) 1951-06-06 1952-05-27 Chromium pigment enhancements
NL170009A NL83801C (en) 1951-06-06 1952-05-31 Method for improving the lightfastness and the hue of lead chromate pigments.
BE511918A BE511918A (en) 1951-06-06 1952-06-06 Chromium pigment enhancements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB13464/51A GB730176A (en) 1951-06-06 1951-06-06 Improvements in chrome pigments
NL170009A NL83801C (en) 1951-06-06 1952-05-31 Method for improving the lightfastness and the hue of lead chromate pigments.

Publications (1)

Publication Number Publication Date
GB730176A true GB730176A (en) 1955-05-18

Family

ID=40795057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13464/51A Expired GB730176A (en) 1951-06-06 1951-06-06 Improvements in chrome pigments

Country Status (4)

Country Link
BE (1) BE511918A (en)
FR (1) FR1063109A (en)
GB (1) GB730176A (en)
NL (1) NL83801C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1592943A1 (en) * 1965-10-05 1971-03-04 Du Pont Color-fast lead chromate pigment
DE3323248C1 (en) * 1983-06-28 1984-10-11 Basf Farben + Fasern Ag, 2000 Hamburg Lead chromate and lead chromate/lead molybdate mixed crystal pigments for use in water-dilutable binders, and process for their production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1592943A1 (en) * 1965-10-05 1971-03-04 Du Pont Color-fast lead chromate pigment
DE3323248C1 (en) * 1983-06-28 1984-10-11 Basf Farben + Fasern Ag, 2000 Hamburg Lead chromate and lead chromate/lead molybdate mixed crystal pigments for use in water-dilutable binders, and process for their production

Also Published As

Publication number Publication date
BE511918A (en) 1952-06-30
NL83801C (en) 1957-01-15
FR1063109A (en) 1954-04-29

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