Comparative synthetic study of 1,4-dihydroxy anthraquinone (quinizarin) dye intermediate
1,4-Dihydroxy anthraquinone (quinizarin) has been synthesised with two different precursors' p-chlorophenol and hydroquinone by condensation of phthalic anhydride. It has been noticed that p-chlorophenol gave higher yield as compared to hydroquinone on reaction with phthalic anhydride at 200°C within 3:30 hours in a mixture of concentrated H2SO4 and boric acid. Three disperse dyes have been prepared from the quinizarin. The physical properties of three different colored dyes have also been discussed.
Bhatti, Khalid Pervez,Zuber, Muhammad
p. 758 - 763
(2012/07/28)
More Articles about upstream products of 6737-68-4