GB189910054A - Manufacture of a New Rhodamine Dyestuff. - Google Patents
Manufacture of a New Rhodamine Dyestuff.Info
- Publication number
- GB189910054A GB189910054A GB189910054DA GB189910054A GB 189910054 A GB189910054 A GB 189910054A GB 189910054D A GB189910054D A GB 189910054DA GB 189910054 A GB189910054 A GB 189910054A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stuff
- dye
- dissolved
- sodium carbonate
- soluble
- 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
Landscapes
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Abstract
10,054. Imray, O., [Farbwerke vorm. Meister, Lucius, & Br³ning]. May 12. Dyes, artificial.-Symmetrical dichlorodiethylrhodamine, which is prepared as described in Specification No. 9600, A.D. 1888, is converted into a readily-soluble dye-stuff by sulphonation. For example, the basic dye-stuff is dissolved in sulphuric acid monohydrate at 40‹ C., and fuming sulphuric acid containing 20 per cent. of free anhydride is added gradually so as not to raise the temperature above 35‹-40‹ C. The mixture is stirred until a sample is soluble in sodium carbonate, and it is then poured into cold water, whereby the sulphonic acid is precipitated. This product is dissolved in sodium carbonate, and the solution is filtered and evaporated to dryness. The new dye-stuff dyes wool pink and vivid bluish-red tints.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB189910054T | 1899-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB189910054A true GB189910054A (en) | 1900-03-17 |
Family
ID=32617401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB189910054D Expired GB189910054A (en) | 1899-05-12 | 1899-05-12 | Manufacture of a New Rhodamine Dyestuff. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB189910054A (en) |
-
1899
- 1899-05-12 GB GB189910054D patent/GB189910054A/en not_active Expired
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