GB190923874A - Improvements in the Reduction of Indigo Colouring Matters. - Google Patents

Improvements in the Reduction of Indigo Colouring Matters.

Info

Publication number
GB190923874A
GB190923874A GB190923874DA GB190923874A GB 190923874 A GB190923874 A GB 190923874A GB 190923874D A GB190923874D A GB 190923874DA GB 190923874 A GB190923874 A GB 190923874A
Authority
GB
United Kingdom
Prior art keywords
indigo
reduction
ferrous oxide
iron
mixture
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
Inventor
James Yate Johnson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB190923874A publication Critical patent/GB190923874A/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
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
    • C09B67/0077—Preparations with possibly reduced vat, sulfur or indigo dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

23,874. Johnson, J. Y., [Badische Anilin & Soda Fabrik]. Oct. 18. Indigo and indigoid dyes.-The reduction of indigo and similar dyes, including homologues and halogen derivatives of indigo, indirubin, thioindigo, and derivatives thereof, is effected by means of ferrous oxide, or a mixture of ferrous oxide and iron, in presence of caustic alkali, or alkali carbonate. The ferrous oxide, or mixture thereof with iron, may be treated with a mineral or organic acid, before use in the reduction process. Specifications 25,889/04, 12,444/05, and 23,873/09, are referred to.
GB190923874D 1909-10-18 1909-10-18 Improvements in the Reduction of Indigo Colouring Matters. Expired GB190923874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190923874T 1909-10-18

Publications (1)

Publication Number Publication Date
GB190923874A true GB190923874A (en) 1910-08-04

Family

ID=32558484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190923874D Expired GB190923874A (en) 1909-10-18 1909-10-18 Improvements in the Reduction of Indigo Colouring Matters.

Country Status (1)

Country Link
GB (1) GB190923874A (en)

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