GB181132A - A process for bleaching earthy minerals that in native deposits are stained by colouring matters that render them useless for industrial purposes - Google Patents

A process for bleaching earthy minerals that in native deposits are stained by colouring matters that render them useless for industrial purposes

Info

Publication number
GB181132A
GB181132A GB789821A GB789821A GB181132A GB 181132 A GB181132 A GB 181132A GB 789821 A GB789821 A GB 789821A GB 789821 A GB789821 A GB 789821A GB 181132 A GB181132 A GB 181132A
Authority
GB
United Kingdom
Prior art keywords
bleaching
useless
stained
render
minerals
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
GB789821A
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.)
AUGUSTUS JOHN STUBBS
Original Assignee
AUGUSTUS JOHN STUBBS
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 AUGUSTUS JOHN STUBBS filed Critical AUGUSTUS JOHN STUBBS
Priority to GB789821A priority Critical patent/GB181132A/en
Publication of GB181132A publication Critical patent/GB181132A/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
    • C09C1/28—Compounds of silicon
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

Discoloured earthy minerals such as kaolin, barytes, feldspar, bauxite, &c. are decolorized by suspending the finely divided minerals in water to which are added pieces of platinum, iron or zinc. Sulphur dioxide is then introduced and is reduced by catalytic action to hyposulphurous acid, liberating oxygen, which renders the colouring-substances soluble in the hyposulphurous solvent. The colouring-substances can be precipitated by lime or an alkali for use as pigments. The sulphur dioxide may be prepared by the action of sulphuric acid on metallic copper.
GB789821A 1921-03-12 1921-03-12 A process for bleaching earthy minerals that in native deposits are stained by colouring matters that render them useless for industrial purposes Expired GB181132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB789821A GB181132A (en) 1921-03-12 1921-03-12 A process for bleaching earthy minerals that in native deposits are stained by colouring matters that render them useless for industrial purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB789821A GB181132A (en) 1921-03-12 1921-03-12 A process for bleaching earthy minerals that in native deposits are stained by colouring matters that render them useless for industrial purposes

Publications (1)

Publication Number Publication Date
GB181132A true GB181132A (en) 1922-06-12

Family

ID=9841916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB789821A Expired GB181132A (en) 1921-03-12 1921-03-12 A process for bleaching earthy minerals that in native deposits are stained by colouring matters that render them useless for industrial purposes

Country Status (1)

Country Link
GB (1) GB181132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536887A1 (en) * 1991-10-11 1993-04-14 Engelhard Corporation In situ method for producing hydrosulfite bleach

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536887A1 (en) * 1991-10-11 1993-04-14 Engelhard Corporation In situ method for producing hydrosulfite bleach
US5391526A (en) * 1991-10-11 1995-02-21 Engelhard Corporation Situ method for producing hydrosulfite bleach and use thereof
AU657778B2 (en) * 1991-10-11 1995-03-23 Engelhard Corporation In situ method for producing hydrosulfite bleach and use thereof

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