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GB1535351A - Process for preparing a pigment material containing at least 50%lead chromate and having a low content of acid-soluble lead of less than 5%by weight calculated as pbo - Google Patents

Process for preparing a pigment material containing at least 50%lead chromate and having a low content of acid-soluble lead of less than 5%by weight calculated as pbo

Info

Publication number
GB1535351A
GB1535351A GB100076A GB100076A GB1535351A GB 1535351 A GB1535351 A GB 1535351A GB 100076 A GB100076 A GB 100076A GB 100076 A GB100076 A GB 100076A GB 1535351 A GB1535351 A GB 1535351A
Authority
GB
United Kingdom
Prior art keywords
ions
lead
chromate
precipitate
coating
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
GB100076A
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.)
HORN PIGMENT CHEMIE BV
Original Assignee
HORN PIGMENT CHEMIE BV
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 HORN PIGMENT CHEMIE BV filed Critical HORN PIGMENT CHEMIE BV
Publication of GB1535351A publication Critical patent/GB1535351A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/76—Ketones containing a keto group bound to a six-membered aromatic ring
    • C07C49/84—Ketones containing a keto group bound to a six-membered aromatic ring containing ether groups, groups, groups, or groups
    • 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
    • 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
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/06—Treatment with inorganic compounds
    • C09C3/063—Coating
    • 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
    • C01P2006/80—Compositional purity

Landscapes

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

Abstract

1535351 Lead chromate-containing pigments TEN HORN PIGMENT CHEMIE BV 12 Jan 1976 [13 Jan 1975] 01000/76 Heading C4A A pigment material containing at least 50% lead chromate and having a low content of acid-soluble lead of less than 5% by weight calculated as PbO is prepared by bringing together an aqueous solution containing lead ions and one containing chromate ions with formation of a lead chromate-containing precipitate and with maintenance of an acidic pH during precipitation, after which the precipitate particles are coated by precipitating thereon a coating material, and after which precipitation for the coating of the particles the pH is adjusted at a value lower than 7, the precipitate is separated from the solution and is processed to the pigment material, the precipitation of the lead chromatecontaining precipitate being carried out without previous addition of a pH buffering agent in the presence of chloride ions or of chloride ions and aluminium-containing ions by bringing together the aqueous solution containing lead ions and the aqueous solution containing the chromate ions which latter solution additionally contains sulphate ions and, in the absence of aluminiumcontaining ions, further contains molybdate ions, maintaining an excess of lead ions in the reaction medium during precipitation and coating the precipitate particles with a silicon compound and antimony compound-containing coating.
GB100076A 1975-01-13 1976-01-12 Process for preparing a pigment material containing at least 50%lead chromate and having a low content of acid-soluble lead of less than 5%by weight calculated as pbo Expired GB1535351A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7500365A NL166274C (en) 1975-01-13 1975-01-13 PROCESS FOR PREPARING AT LEAST 50% BY WEIGHT OF LEAD CHROME SIZE CONTAINING LEAD CHROME SULPHATE PIGMENT

Publications (1)

Publication Number Publication Date
GB1535351A true GB1535351A (en) 1978-12-13

Family

ID=19822975

Family Applications (1)

Application Number Title Priority Date Filing Date
GB100076A Expired GB1535351A (en) 1975-01-13 1976-01-12 Process for preparing a pigment material containing at least 50%lead chromate and having a low content of acid-soluble lead of less than 5%by weight calculated as pbo

Country Status (6)

Country Link
BE (1) BE837380A (en)
CA (1) CA1065557A (en)
DE (1) DE2600365A1 (en)
FR (1) FR2297234A1 (en)
GB (1) GB1535351A (en)
NL (1) NL166274C (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772047A (en) * 1972-04-05 1973-11-13 Hercules Inc Preparation of red shade molybdate orange pigments

Also Published As

Publication number Publication date
BE837380A (en) 1976-07-07
FR2297234B3 (en) 1979-06-22
DE2600365A1 (en) 1976-07-15
DE2600365C2 (en) 1987-12-03
FR2297234A1 (en) 1976-08-06
NL166274C (en) 1981-07-15
NL7500365A (en) 1976-07-15
NL166274B (en) 1981-02-16
CA1065557A (en) 1979-11-06

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930112