GB378942A - Improvements in and relating to the production of dibenzanthrone derivatives - Google Patents
Improvements in and relating to the production of dibenzanthrone derivativesInfo
- Publication number
- GB378942A GB378942A GB1481631A GB1481631A GB378942A GB 378942 A GB378942 A GB 378942A GB 1481631 A GB1481631 A GB 1481631A GB 1481631 A GB1481631 A GB 1481631A GB 378942 A GB378942 A GB 378942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dihydroxydibenzanthrone
- prepared according
- dyes
- paraformaldehyde
- class
- 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
Dibenzanthrone derivatives.--Blue and reddish-blue dyestuffs are obtained by treating a diacyl derivative of Bz2.Bz2<1>-dihydroxydibenzanthrone obtained by acylating according to Specification 193,431, [Class 2 (iii), Dyes &c.], or a dialkyl derivative of Bz2.Bz2<1>-dihydroxydibenzanthrone obtained by alkylating according to examples A and B (jointly) of Specification 181,304, (the Bz2: Bz2<1>-dihydroxydibenzanthnone obtained according to example 13 of Specification 203,533, [Class 2 (iii), Dyes &c.], being the parent material in each case), with an aliphatic aldehyde, or a p substance yielding such an aldehyde, in a sulphuric acid medium. Formaldehyde or paraformaldehyde is preferably employed in concentrated sulphuric acid, and in the case of the diacyl derivatives the acyl groups appear to be split off with formation of the methylene ethers. Similar alkylidene ethers appear to be formed when higher aldehydes are employed, and also when the dialkyl deriva ives are treated. In the latter case the dimethyl derivative is preferably employed, for example in the pure form of Caledon Jade Green. In examples: (1) Bz2 : Bz2<1>-diacetoxydibenzanthrone (prepared according to example 3 of Specification 193,431 from the Bz2 : Bz2<1>-dihydroxydibenzanthrone prepared according to example 13 of Specification 203,533) is treated with paraformaldehyde in sulphuric acid; cotton is dyed bright blue shades by the product: (2) Bz2 : Bz2<1>-dihydroxydibenzanthrone dibenzoate (prepared according to example 2 of Specification 193,431 from the Bz2 : Bz2<1>-dihydroxydibenzanthrone prepared according to example 13 of Specification 203,533) is treated as in (1) to give a similar product: (3) Bz2 : Bz2<1>-dimethoxydibenzanthrone (prepared according to example B of Specification 181,304, [Class 2 (iii), Dyes &c.], from the dihydroxydibenzanthrone obtained according to example 13 of Specification 203,533) is treated with paraformaldehyde in concentrated sulphuric acid to give a product dyeing reddish-blue shades; by replacing paraformaldehyde by paracetaldehyde a similar dyestuff is obtained. Specification 206,638, [Class 2 (iii), Dyes &c.], also is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1481631A GB378942A (en) | 1931-05-19 | 1931-05-19 | Improvements in and relating to the production of dibenzanthrone derivatives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1481631A GB378942A (en) | 1931-05-19 | 1931-05-19 | Improvements in and relating to the production of dibenzanthrone derivatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB378942A true GB378942A (en) | 1932-08-19 |
Family
ID=10047981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1481631A Expired GB378942A (en) | 1931-05-19 | 1931-05-19 | Improvements in and relating to the production of dibenzanthrone derivatives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB378942A (en) |
-
1931
- 1931-05-19 GB GB1481631A patent/GB378942A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB425450A (en) | Process for dyeing acetate artificial silk | |
| GB378942A (en) | Improvements in and relating to the production of dibenzanthrone derivatives | |
| US1976167A (en) | Nitrogenous derivatives of the anthraquinone series and process of making same | |
| US2623047A (en) | Acridone vat dyestuffs | |
| US2098782A (en) | Azo dyestuffs | |
| GB306963A (en) | Process for the manufacture of new anthraquinone derivatives | |
| GB299972A (en) | The manufacture of vat dyestuffs of the anthracene series | |
| US2729631A (en) | Vat dyestuff of the anthraquinone-acridone series | |
| US1638475A (en) | Process of obtaining fast-colored discharges on fast dyeings | |
| US1904815A (en) | of basel | |
| US2151634A (en) | Arylamino-aryloxy-hydroxy-anthraquinones | |
| GB263494A (en) | Improvements in the manufacture and production of vat dyestuffs of the anthraquinoneseries | |
| US1832236A (en) | Production of vat dyestuffs of the n-methyl acridine anthrone naphthoquinone series | |
| US1674168A (en) | Process of producing yellow dyeings on cellulose esters or cellulose ethers | |
| US1920426A (en) | Vat dyestuffs of the pyrazolanthrone series and process of making them | |
| US1804840A (en) | Manufacture of grey to black vat dyestuffs | |
| US1412038A (en) | Dyestuffs of the indigo series | |
| GB260588A (en) | Improvements in the manufacture and production of vat dyestuffs of the anthraquinone series | |
| GB379555A (en) | Manufacture of azo-dyestuffs on the fibre | |
| GB439885A (en) | Improvements in the manufacture and production of dyestuffs of the anthraquinone series | |
| GB337741A (en) | Improvements in the manufacture and production of vat dyestuffs | |
| GB347236A (en) | Improvements in the manufacture and production of vat dyestuffs | |
| GB347099A (en) | A process for manufacturing vat dye stuffs of the perylene series | |
| GB265232A (en) | Manufacture of vat-dyestuffs | |
| GB348661A (en) | Improvements in and relating to the production and use of anthraquinone derivatives |