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Priority to RO122156ApriorityCriticalpatent/RO92960B1/en
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Publication of RO92960B1publicationCriticalpatent/RO92960B1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Inventia se refera la un procedeu de obtinere a 2-hidroxi-1-naftaldehidei prin reactia beta -naftolului cu hexametilentetramina în mediu de acid acetic si acid sulfuric la temperatura de 90...100 degree C, dupa care masa de reactie se dilueaza cu apa, constînd în aceea ca acidul sulfuric utilizat are concentratie 50%, iar dupa diluarea masei de reactie obtinute, se neutralizeaza cu o solutie de NaOH 25...30/% pîna la ph = 2,5...3.The invention relates to a process for the preparation of 2-hydroxy-1-naphthaldehyde by reacting beta-naphthol with hexamethylenetetramine in acetic acid and sulfuric acid medium at a temperature of 90-100 ° C, after which the reaction mass is diluted with water, in that the sulfuric acid used is 50% concentration, and after dilution of the reaction mass, it is neutralized with a NaOH solution of 25 ... 30% to pH = 2.5 ... 3.
RO122156A1986-02-071986-02-07Process for obtaining 2-hydroxy-1-naphthaldehyde
RO92960B1
(en)