GB1498300A - Production of low sulphur chromium(iii)oxide pigment - Google Patents

Production of low sulphur chromium(iii)oxide pigment

Info

Publication number
GB1498300A
GB1498300A GB13188/75A GB1318875A GB1498300A GB 1498300 A GB1498300 A GB 1498300A GB 13188/75 A GB13188/75 A GB 13188/75A GB 1318875 A GB1318875 A GB 1318875A GB 1498300 A GB1498300 A GB 1498300A
Authority
GB
United Kingdom
Prior art keywords
sio
dwell
zone
reaction zone
temperature
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
GB13188/75A
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of GB1498300A publication Critical patent/GB1498300A/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
    • C09C1/34—Compounds of chromium
    • C09C1/346—Chromium oxides
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • 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

Landscapes

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

Abstract

1498300 Low S-containing Cr 2 O 3 pigment BAYER AG 1 April 1975 [3 April 1974] 13188/75 Heading CIA Low S-containing Cr 2 O 3 pigment (e.g. less than 0À005% by wt.) is prepared by reducing a finely divided alkali metal chromate in a heated hydrogen-containing reaction zone at a temperature of from 900 to 1600‹ C., the reaction zone being followed by a dwell zone in which a temperature of 900-1600‹ C. is established by additional direct heating by introducing an oxygen-containing gas into the dwell zone; the Cr 2 O 3 is recovered in the form of an aqueous suspension. Reduction is preferably carried out in the presence of salt forming gas (e.g. Cl 2 , HCI, Br 2 , HBr, NO, NO 2 or CO 2 ) to bind the alkali metal ions. Ideally, the temperature difference between dwell and reaction zones is no more than 200‹ C. Advantageously, finely divided SiO 2 is added to the chromate before introduction into the reaction zone; the SiO 2 may be formed by vapour phase hydrolysis of SiCl 4 yielding 0À1 to 2% by wt. of SiO 2 .
GB13188/75A 1974-04-03 1975-04-01 Production of low sulphur chromium(iii)oxide pigment Expired GB1498300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2416203A DE2416203A1 (en) 1974-04-03 1974-04-03 PROCESS FOR MANUFACTURING LOW SULFUR CHROME (III) OXIDE WITH IMPROVED PIGMENT PROPERTIES

Publications (1)

Publication Number Publication Date
GB1498300A true GB1498300A (en) 1978-01-18

Family

ID=5912047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13188/75A Expired GB1498300A (en) 1974-04-03 1975-04-01 Production of low sulphur chromium(iii)oxide pigment

Country Status (8)

Country Link
JP (1) JPS50135017A (en)
CA (1) CA1045757A (en)
DE (1) DE2416203A1 (en)
ES (1) ES436259A1 (en)
FR (1) FR2266660B1 (en)
GB (1) GB1498300A (en)
NL (1) NL7503864A (en)
ZA (1) ZA752082B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2568112C9 (en) 2010-03-23 2016-07-20 ЛЕНКСЕСС Дойчланд ГмбХ Method of producing chromium (iii) oxide
AR084183A1 (en) 2010-12-08 2013-04-24 Lanxess Deutschland Gmbh PROCEDURE FOR THE PRODUCTION OF CHROME OXIDE (III)
EP2565162A1 (en) 2011-09-05 2013-03-06 LANXESS Deutschland GmbH Method for producing chromium (III) oxide

Also Published As

Publication number Publication date
ZA752082B (en) 1976-03-31
ES436259A1 (en) 1977-01-01
FR2266660A1 (en) 1975-10-31
DE2416203A1 (en) 1975-10-16
NL7503864A (en) 1975-10-07
JPS50135017A (en) 1975-10-25
FR2266660B1 (en) 1978-06-30
CA1045757A (en) 1979-01-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee