GB2012739A - Purifying chromic oxide - Google Patents

Purifying chromic oxide

Info

Publication number
GB2012739A
GB2012739A GB79204A GB7900204A GB2012739A GB 2012739 A GB2012739 A GB 2012739A GB 79204 A GB79204 A GB 79204A GB 7900204 A GB7900204 A GB 7900204A GB 2012739 A GB2012739 A GB 2012739A
Authority
GB
United Kingdom
Prior art keywords
chromic oxide
purifying
calcination
ppm
minutes
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.)
Granted
Application number
GB79204A
Other versions
GB2012739B (en
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.)
British Chrome and Chemicals Ltd
Original Assignee
British Chrome and Chemicals 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 British Chrome and Chemicals Ltd filed Critical British Chrome and Chemicals Ltd
Priority to GB79204A priority Critical patent/GB2012739B/en
Publication of GB2012739A publication Critical patent/GB2012739A/en
Application granted granted Critical
Publication of GB2012739B publication Critical patent/GB2012739B/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium
    • 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
    • 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
    • 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
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/043—Drying, calcination
    • 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
    • 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
    • C01P2006/10—Solid density
    • 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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Chromic oxide of very low (below 40 ppm) insoluble sulphur content is obtained by calcination of a less pure product at a temperature above 1100 DEG C for at least 10 minutes.
GB79204A 1978-01-17 1979-01-04 Chromic oxide production Expired GB2012739B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB79204A GB2012739B (en) 1978-01-17 1979-01-04 Chromic oxide production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB174978 1978-01-17
GB79204A GB2012739B (en) 1978-01-17 1979-01-04 Chromic oxide production

Publications (2)

Publication Number Publication Date
GB2012739A true GB2012739A (en) 1979-08-01
GB2012739B GB2012739B (en) 1982-09-29

Family

ID=26236953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB79204A Expired GB2012739B (en) 1978-01-17 1979-01-04 Chromic oxide production

Country Status (1)

Country Link
GB (1) GB2012739B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068787A1 (en) * 1981-06-24 1983-01-05 Pfizer Inc. Preparation of pigment grade chromium oxide
WO1996041679A1 (en) * 1995-06-08 1996-12-27 E.I. Du Pont De Nemours And Company Treatment of chromium oxide and catalytic manufacture of vinyl fluoride
CN110980807A (en) * 2019-12-26 2020-04-10 四川省银河化学股份有限公司 Method for producing chromium green by adopting basic chromium sulfate
CN113620318A (en) * 2021-07-31 2021-11-09 华南理工大学 Method for treating chromium-containing mirabilite waste salt by chlorination process
CN114212821A (en) * 2022-01-07 2022-03-22 重庆民丰化工有限责任公司 Method for producing chromium green by using chromic anhydride by-product
CN114436331A (en) * 2022-03-17 2022-05-06 衡水友谊新材料科技有限公司 Preparation method of chromium oxide green pigment with ultra-light, bright green and low hexavalent chromium content

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068787A1 (en) * 1981-06-24 1983-01-05 Pfizer Inc. Preparation of pigment grade chromium oxide
WO1996041679A1 (en) * 1995-06-08 1996-12-27 E.I. Du Pont De Nemours And Company Treatment of chromium oxide and catalytic manufacture of vinyl fluoride
US6034289A (en) * 1995-06-08 2000-03-07 E. I. Du Pont De Nemours And Company Treatment of chromium oxide and catalytic manufacture of vinyl fluoride
US6359183B1 (en) 1995-06-08 2002-03-19 E. I. Du Pont De Nemours And Company Treatment of chromium oxide and catalytic manufacture of vinyl fluoride
CN110980807A (en) * 2019-12-26 2020-04-10 四川省银河化学股份有限公司 Method for producing chromium green by adopting basic chromium sulfate
CN113620318A (en) * 2021-07-31 2021-11-09 华南理工大学 Method for treating chromium-containing mirabilite waste salt by chlorination process
CN114212821A (en) * 2022-01-07 2022-03-22 重庆民丰化工有限责任公司 Method for producing chromium green by using chromic anhydride by-product
CN114436331A (en) * 2022-03-17 2022-05-06 衡水友谊新材料科技有限公司 Preparation method of chromium oxide green pigment with ultra-light, bright green and low hexavalent chromium content

Also Published As

Publication number Publication date
GB2012739B (en) 1982-09-29

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19990103