70956-30-8Relevant articles and documents
Disperse red 60 condensation process
-
Paragraph 0016-0019, (2020/06/04)
The invention relates to the technical field of dyes, in particular to a disperse red 60 condensation process. The process comprises the following steps: in a condensation kettle, firstly adding phenol and a 1-amino-2-bromo-4-hydroxyanthraquinone dry product, then adding sodium carbonate and a catalyst, heating to 140-160 DEG C, carrying out reactions at a constant temperature; after the reactionis finished, cooling to 90-100 DEG C, adding water within the temperature range, dropwise adding liquid caustic soda, cooling to 50-55 DEG C after dropwise adding is finished, filtering, cleaning, anddrying to obtain 1-amino-2-phenoxy-4-hydroxyanthraquinone, namely disperse red 60. According to the process, a condensed acid-binding agent (potassium carbonate) is directly substituted by sodium carbonate with a lower price, and a certain amount of a proper phase transfer catalyst is added, so that the contact probability and activity of condensation reactions are improved, the aims of improvingthe product quality and yield and reducing the production cost are fulfilled, and the cost of the disperse red 60 can be reduced by 1500 yuan/ton.
Order Parameters of β-Substituted Anthraquinone Dyes I: 1-Amino-4-Hydroxyanthraquinone Derivatives
Imazeki, Shuji,Ono, Hitoshi,Kaneko, Masaharu,Mukoh, Akio
, p. 249 - 262 (2007/10/02)
A study is presented of the optical order parameters and spectroscopic properties of 1-amino-4-hydroxyanthraquinone derivatives containing various substituents in the 2-position in a nematic liquid crystalline mixture composed of cyanophenylcyclohexane derivatives.The results are discussed in terms of the effects of the dye structure on the order parameters.By introducing a -SCH2- group into the 2-position, magneta dyes have been obtained which show high order parameters and solubilities.In addition, preliminary data on the solubility and photostability of the dyes are reported.