Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by îNTREPRINDEREA DE COLORANTI "COLOROM"filedCriticalîNTREPRINDEREA DE COLORANTI "COLOROM"
Priority to RO118815ApriorityCriticalpatent/RO92446B1/en
Publication of RO92446A2publicationCriticalpatent/RO92446A2/en
Publication of RO92446B1publicationCriticalpatent/RO92446B1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Inventia se refera la un procedeu de preparare a indantrenului prin topirea alcalina a 2-amino-antrachinonei cu un amestec de alcalii, constituit din hidrohid de potasiu si hidroxid de sodiu, în prezenta de acetat de sodiu urmata de oxigenarea dihidroderivatului de colorant prin adaugare de azotat de sodiu în prezenta unui catalizator pentru îmbunatatirea randamentului de reactie.The invention relates to a process for the preparation of indantrene by the alkaline melting of 2-amino-anthraquinone with a mixture of alkali consisting of potassium hydroxide and sodium hydroxide in the presence of sodium acetate followed by the oxygenation of the dihydric dye by adding sodium nitrate in the presence of a catalyst to improve the yield of the reaction.
RO118815A1985-05-211985-05-21Process for preparing indanthrene
RO92446B1
(en)