DIALKYL AMINO ANTHRAQUINONIC COMPOUNDS FOR COLOURING SOLUTIONS FOR PETROLEUM DISTILLATE

摘要

Ugo Marangelli, Giancarlo Ciocci and Sisto Sergio Papa CONCENTRATED COLOURING SOLUTIONS OF A BLUE TINGE BASED ON MIXTURE OF 1.4-DIALKYL+ANTHRAQUINONES FOR THE COLOURING OF PETROLIFEROUS PRODUCTS The present invention relates to concentrated solutions in organic solvents of special mixtures of 1-4-dialkyl-amino-anthraquinone dyes particularly useful for the colouring of hydrocarbons. The solutions of this invention are particularly useful for the colouring of hydrocarbons obtained by distillation of crude oil such, for example, as petrol kerosene and gas oil. The invention also includes the preparation of the aforementioned concentrated solutions, including direct preparation of the solutions during the synthesis phase of the anthraquinone dyes.