GB220212A - Improvements in the manufacture and production of green vat dyestuffs - Google Patents
Improvements in the manufacture and production of green vat dyestuffsInfo
- Publication number
- GB220212A GB220212A GB3039023A GB3039023A GB220212A GB 220212 A GB220212 A GB 220212A GB 3039023 A GB3039023 A GB 3039023A GB 3039023 A GB3039023 A GB 3039023A GB 220212 A GB220212 A GB 220212A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitrodibenzanthrone
- hypochlorite
- violet
- product
- green
- 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
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
- C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
- C09B3/22—Dibenzanthrones; Isodibenzanthrones
- C09B3/30—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Nitrodibenzanthrone is purified by dissolving it in concentrated sulphuric acid and fractionally precipitating by addition of suitable diluents, such as dilute sulphuric acid, water, or acetic acid. The product dyes cotton blue shades from a hydrosulphite vat, becoming clear green on exposure to air, and violet-grey to violet-black on treatment with hypochlorite. The nitrodibenzanthrone used may be prepared by nitrating either crude or pure dibenzanthrone. The purified product heated to 180 DEG C. with aluminium chloride in nitrobenzene gives a product dyeing green shades, which become black on treatment with hypochlorite. Specifications 1818/05 and 12817/13 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3039023A GB220212A (en) | 1923-12-03 | 1923-12-03 | Improvements in the manufacture and production of green vat dyestuffs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3039023A GB220212A (en) | 1923-12-03 | 1923-12-03 | Improvements in the manufacture and production of green vat dyestuffs |
Publications (1)
Publication Number | Publication Date |
---|---|
GB220212A true GB220212A (en) | 1924-08-14 |
Family
ID=10306905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3039023A Expired GB220212A (en) | 1923-12-03 | 1923-12-03 | Improvements in the manufacture and production of green vat dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB220212A (en) |
-
1923
- 1923-12-03 GB GB3039023A patent/GB220212A/en not_active Expired
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