GB350862A - Manufacture of a stable reduction compound of a vat-dyestuff - Google Patents

Manufacture of a stable reduction compound of a vat-dyestuff

Info

Publication number
GB350862A
GB350862A GB3027530A GB3027530A GB350862A GB 350862 A GB350862 A GB 350862A GB 3027530 A GB3027530 A GB 3027530A GB 3027530 A GB3027530 A GB 3027530A GB 350862 A GB350862 A GB 350862A
Authority
GB
United Kingdom
Prior art keywords
dyestuff
solution
alcohol
vat
manufacture
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
GB3027530A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB3027530A priority Critical patent/GB350862A/en
Publication of GB350862A publication Critical patent/GB350862A/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)
  • Indole Compounds (AREA)

Abstract

Thioindigo series.-A stable reduction product, having properties similar to those of the products of the parent Specification, is obtained by treating 4 : 7 : 41 : 71 - tetramethyl - 5 : 51 - dichlorthioindigo with an alkali and a reducing agent other than a hydrosulphide, and causing an acid, such as carbonic acid or sulphurous acid, to act on the solution thus obtained. The reduction process is facilitated by the addition of an alcohol, such as ethyl alcohol. In an example, the dyestuff is reduced with sodium hydrosulphite solution and caustic soda in the presence of alcohol, and carbon dioxide is introduced into the solution in order to separate the reduction compound. Specification 6490/07, [Class 2, Acids and salts, Organic &c.], is referred to.
GB3027530A 1930-10-09 1930-10-09 Manufacture of a stable reduction compound of a vat-dyestuff Expired GB350862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3027530A GB350862A (en) 1930-10-09 1930-10-09 Manufacture of a stable reduction compound of a vat-dyestuff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3027530A GB350862A (en) 1930-10-09 1930-10-09 Manufacture of a stable reduction compound of a vat-dyestuff

Publications (1)

Publication Number Publication Date
GB350862A true GB350862A (en) 1931-06-18

Family

ID=10305054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3027530A Expired GB350862A (en) 1930-10-09 1930-10-09 Manufacture of a stable reduction compound of a vat-dyestuff

Country Status (1)

Country Link
GB (1) GB350862A (en)

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